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struts(17)注释

正如前面提到的，Struts提供了两种形式的配置。传统的方式是使用对所有配置struts.xml文件。到目前为止，我们已经看到了这样的例子很多。 Struts配置的另一种方法是使用Java5注释功能。使用Struts 注解，我们可以实现零配置。

要开始在你的项目中使用注释，确保WebContent/WEB-INF/lib文件夹中的jar文件包括以下：  

  • struts2-convention-plugin-x.y.z.jar

  • asm-x.y.jar

  • antlr-x.y.z.jar

  • commons-fileupload-x.y.z.jar

  • commons-io-x.y.z.jar

  • commons-lang-x.y.jar

  • commons-logging-x.y.z.jar

  • commons-logging-api-x.y.jar

  • freemarker-x.y.z.jar

  • javassist-.xy.z.GA

  • ognl-x.y.z.jar

  • struts2-core-x.y.z.jar

  • xwork-core.x.y.z.jar

现在，让我们看看你如何能做到配置在struts.xml文件，取而代之的是注解。

Struts2注释的概念的解释，我们需要重新考虑我们的验证为例说明在 Struts2的验证 一章中。

在这里，我们将采取一个例子，雇员Employee 将被捕获的姓名和年龄使用一个简单的页面，我们将会把两个验证，以确保使用总是进入一个名字和年龄应该是在28和65之间。所以，让我们先从主JSP页面的例子。

创建主页：

让我们写主JSP页面文件index.jsp，这将被用来收集上述员工的相关信息。

<span class="pun" style="margin: 0px; padding: 0px;"><%@</span><span class="pln" style="margin: 0px; padding: 0px;"> page language</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"java"</span><span class="pln" style="margin: 0px; padding: 0px;"> contentType</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"text/html; charset=ISO-8859-1"</span><span class="pln" style="margin: 0px; padding: 0px;">
   pageEncoding</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"ISO-8859-1"</span><span class="pln" style="margin: 0px; padding: 0px;">%>
</span><span class="pun" style="margin: 0px; padding: 0px;"><%@</span><span class="pln" style="margin: 0px; padding: 0px;"> taglib prefix</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"s"</span><span class="pln" style="margin: 0px; padding: 0px;"> uri</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/struts-tags"</span><span class="pln" style="margin: 0px; padding: 0px;">%>
</span><span class="dec" style="margin: 0px; padding: 0px;"><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd"></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><html></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><head></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><title></span><span class="pln" style="margin: 0px; padding: 0px;">Employee Form</span><span class="tag" style="margin: 0px; padding: 0px;"></title></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></head></span><span class="pln" style="margin: 0px; padding: 0px;">

</span><span class="tag" style="margin: 0px; padding: 0px;"><body></span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="tag" style="margin: 0px; padding: 0px;"><s:form</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">action</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"empinfo"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">method</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"post"</span><span class="tag" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><s:textfield</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"name"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">label</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"Name"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">size</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"20"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="tag" style="margin: 0px; padding: 0px;">/></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><s:textfield</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"age"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">label</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"Age"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">size</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"20"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="tag" style="margin: 0px; padding: 0px;">/></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><s:submit</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"submit"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">label</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"Submit"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">align</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"center"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="tag" style="margin: 0px; padding: 0px;">/></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"></s:form></span><span class="pln" style="margin: 0px; padding: 0px;">

</span><span class="tag" style="margin: 0px; padding: 0px;"></body></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></html></span>

在index.jsp使用Struts的标签，我们还没有覆盖，但我们将研究这些标签相关的章节。但现在，假设s:textfield 标签打印一个输入字段 s:submit 打印一个提交按钮。我们已经使用label属性标签，每个标签每个标签创建。

创建视图：

我们将使用JSP文件的success.jsp将调用的情况下定义的动作返回SUCCESS。

<span class="pun" style="margin: 0px; padding: 0px;"><%@</span><span class="pln" style="margin: 0px; padding: 0px;"> page language</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"java"</span><span class="pln" style="margin: 0px; padding: 0px;"> contentType</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"text/html; charset=ISO-8859-1"</span><span class="pln" style="margin: 0px; padding: 0px;">
	pageEncoding</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"ISO-8859-1"</span><span class="pln" style="margin: 0px; padding: 0px;">%>
</span><span class="pun" style="margin: 0px; padding: 0px;"><%@</span><span class="pln" style="margin: 0px; padding: 0px;"> taglib prefix</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"s"</span><span class="pln" style="margin: 0px; padding: 0px;"> uri</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/struts-tags"</span><span class="pln" style="margin: 0px; padding: 0px;">%>
</span><span class="dec" style="margin: 0px; padding: 0px;"><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd"></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><html></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><head></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><title></span><span class="pln" style="margin: 0px; padding: 0px;">Success</span><span class="tag" style="margin: 0px; padding: 0px;"></title></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></head></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><body></span><span class="pln" style="margin: 0px; padding: 0px;">
   Employee Information is captured successfully.
</span><span class="tag" style="margin: 0px; padding: 0px;"></body></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></html></span>

创建动作：

这是将用于注释的地方。让我们重新定义行动Employee类的注释，然后添加一个方法称为validate() ，如下所示在Employee.java文件。请确保操作类扩展ActionSupport类，否则validate方法将不会被执行。

<span class="kwd" style="margin: 0px; padding: 0px;">package</span><span class="pln" style="margin: 0px; padding: 0px;"> com</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">yiibai</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">struts2</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">

</span><span class="kwd" style="margin: 0px; padding: 0px;">import</span><span class="pln" style="margin: 0px; padding: 0px;"> com</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">opensymphony</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">xwork2</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">import</span><span class="pln" style="margin: 0px; padding: 0px;"> org</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">apache</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">struts2</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">convention</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">annotation</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">Action</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">import</span><span class="pln" style="margin: 0px; padding: 0px;"> org</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">apache</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">struts2</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">convention</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">annotation</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">Result</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">import</span><span class="pln" style="margin: 0px; padding: 0px;"> org</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">apache</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">struts2</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">convention</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">annotation</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">Results</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">import</span><span class="pln" style="margin: 0px; padding: 0px;"> com</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">opensymphony</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">xwork2</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">validator</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">annotations</span><span class="pun" style="margin: 0px; padding: 0px;">.*;</span><span class="pln" style="margin: 0px; padding: 0px;">

</span><span class="lit" style="margin: 0px; padding: 0px;">@Results</span><span class="pun" style="margin: 0px; padding: 0px;">({</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="lit" style="margin: 0px; padding: 0px;">@Result</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"success"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> location</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/success.jsp"</span><span class="pun" style="margin: 0px; padding: 0px;">),</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="lit" style="margin: 0px; padding: 0px;">@Result</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"input"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> location</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/index.jsp"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">})</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">private</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">private</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">int</span><span class="pln" style="margin: 0px; padding: 0px;"> age</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="lit" style="margin: 0px; padding: 0px;">@Action</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">value</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/empinfo"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> execute</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> SUCCESS</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="lit" style="margin: 0px; padding: 0px;">@RequiredFieldValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"The name is required"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getName</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">void</span><span class="pln" style="margin: 0px; padding: 0px;"> setName</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">this</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">name </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="lit" style="margin: 0px; padding: 0px;">@IntRangeFieldValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Age must be in between 28 and 65"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;">
                                      min </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"29"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> max </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"65"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">int</span><span class="pln" style="margin: 0px; padding: 0px;"> getAge</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> age</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">void</span><span class="pln" style="margin: 0px; padding: 0px;"> setAge</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="kwd" style="margin: 0px; padding: 0px;">int</span><span class="pln" style="margin: 0px; padding: 0px;"> age</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">this</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">age </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> age</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

在这个例子中，我们已经使用了一些注解。让我逐个说明：

  • 首先，我们已经Result注解。结果注解的结果是一个集合。结果注解下，我们有两个结果注释。结果注释的名称对应的执行方法的结果。它们还含有一个视图应担任相应的execute() 返回值的位置。

  • 下一个注解是行动注解。这是用来修饰 execute()方法。操作方法也需要一个值，该URL上调用操作。

  • 最后，使用两个验证的注解。已经配置了所需的字段验证的年龄字段"name“字段和整数范围验证。也指定了自定义验证消息。

配置文件：

我们不需要struts.xml 配置文件，让我们删除该文件，并让我们检查web.xml文件中的内容：

<span class="pun" style="margin: 0px; padding: 0px;"><?</span><span class="pln" style="margin: 0px; padding: 0px;">xml version</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"1.0"</span><span class="pln" style="margin: 0px; padding: 0px;"> encoding</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"UTF-8"</span><span class="pun" style="margin: 0px; padding: 0px;">?></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><web-app</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">xmlns:xsi</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"http://www.w3.org/2001/XMLSchema-instance"</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="atn" style="margin: 0px; padding: 0px;">xmlns</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"http://java.sun.com/xml/ns/javaee"</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="atn" style="margin: 0px; padding: 0px;">xmlns:web</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="atn" style="margin: 0px; padding: 0px;">xsi:schemaLocation</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"http://java.sun.com/xml/ns/javaee
   http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="atn" style="margin: 0px; padding: 0px;">id</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"WebApp_ID"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">version</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"3.0"</span><span class="tag" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="tag" style="margin: 0px; padding: 0px;"><display-name></span><span class="pln" style="margin: 0px; padding: 0px;">Struts 2</span><span class="tag" style="margin: 0px; padding: 0px;"></display-name></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"><welcome-file-list></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><welcome-file></span><span class="pln" style="margin: 0px; padding: 0px;">index.jsp</span><span class="tag" style="margin: 0px; padding: 0px;"></welcome-file></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"></welcome-file-list></span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="tag" style="margin: 0px; padding: 0px;"><filter></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><filter-name></span><span class="pln" style="margin: 0px; padding: 0px;">struts2</span><span class="tag" style="margin: 0px; padding: 0px;"></filter-name></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><filter-class></span><span class="pln" style="margin: 0px; padding: 0px;">
         org.apache.struts2.dispatcher.FilterDispatcher
      </span><span class="tag" style="margin: 0px; padding: 0px;"></filter-class></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><init-param></span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="tag" style="margin: 0px; padding: 0px;"><param-name></span><span class="pln" style="margin: 0px; padding: 0px;">struts.devMode</span><span class="tag" style="margin: 0px; padding: 0px;"></param-name></span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="tag" style="margin: 0px; padding: 0px;"><param-value></span><span class="pln" style="margin: 0px; padding: 0px;">true</span><span class="tag" style="margin: 0px; padding: 0px;"></param-value></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"></init-param></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"></filter></span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="tag" style="margin: 0px; padding: 0px;"><filter-mapping></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><filter-name></span><span class="pln" style="margin: 0px; padding: 0px;">struts2</span><span class="tag" style="margin: 0px; padding: 0px;"></filter-name></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><url-pattern></span><span class="pln" style="margin: 0px; padding: 0px;">/*</span><span class="tag" style="margin: 0px; padding: 0px;"></url-pattern></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"></filter-mapping></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></web-app></span>

现在，右键点击项目名称，并单击 Export > WAR File创建一个WAR文件。然后部署此WAR在Tomcat的webapps目录下。最后，启动Tomcat服务器和尝试访问URL http://localhost:8080/HelloWorldStruts2/index.jsp。这会给出以下画面：

struts(17)注释_第1张图片

现在不输入任何所需信息，只需点击“Submit ”按钮。将看到以下结果： 

struts(17)注释_第2张图片

输入所需的信息，但输入了错误的“From ”字段，让我们说“test”和年龄为30名，最后点击“Submit ”按钮。将看到以下结果：

struts(17)注释_第3张图片

Struts 2 应用程序可以使用Java5注释作为替代XML和Java属性配置。这里是清单的不同的类别有关的最重要的注解：

命名空间注释（动作注释）：

@ Namespace注释允许在Action类中，而不是基于零配置的约定动作的命名空间的定义。

<span class="lit" style="margin: 0px; padding: 0px;">@Namespace</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="str" style="margin: 0px; padding: 0px;">"/content"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
  </span><span class="pun" style="margin: 0px; padding: 0px;">...</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

结果注释 - （动作译注）：

@ Result注解允许在Action类中，而不是一个XML文件中定义的动作结果。

<span class="lit" style="margin: 0px; padding: 0px;">@Result</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"success"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> value</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/success.jsp"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
 </span><span class="pun" style="margin: 0px; padding: 0px;">...</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

结果注释 - （动作译注）：

@ Results注解定义了一套动作的结果。

<span class="lit" style="margin: 0px; padding: 0px;">@Results</span><span class="pun" style="margin: 0px; padding: 0px;">({</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="lit" style="margin: 0px; padding: 0px;">@Result</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"success"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> value</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/success.jsp"</span><span class="pun" style="margin: 0px; padding: 0px;">),</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="lit" style="margin: 0px; padding: 0px;">@Result</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"error"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> value</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/error.jsp"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">})</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
 </span><span class="pun" style="margin: 0px; padding: 0px;">...</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

注释后（拦截注释）：

@After注解标志着一个需要调用后的主要操作方法和执行结果的操作方法。返回值将被忽略。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="lit" style="margin: 0px; padding: 0px;">@After</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">void</span><span class="pln" style="margin: 0px; padding: 0px;"> isValid</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">throws</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ValidationException</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="com" style="margin: 0px; padding: 0px;">// validate model object, throw exception if failed</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> execute</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="com" style="margin: 0px; padding: 0px;">// perform secure action</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> SUCCESS</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

注释之前（拦截注释）：

@ Before注释标记需要一个操作方法的主要操作方法之前被调用执行结果。返回值将被忽略。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="lit" style="margin: 0px; padding: 0px;">@Before</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">void</span><span class="pln" style="margin: 0px; padding: 0px;"> isAuthorized</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">throws</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">AuthenticationException</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="com" style="margin: 0px; padding: 0px;">// authorize request, throw exception if failed</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> execute</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="com" style="margin: 0px; padding: 0px;">// perform secure action</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> SUCCESS</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

BeforeResult注释 - （拦截注释）：

@ BeforeResult注解标志着一个结果之前需要执行的操作方法。返回值将被忽略。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="lit" style="margin: 0px; padding: 0px;">@BeforeResult</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">void</span><span class="pln" style="margin: 0px; padding: 0px;"> isValid</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">throws</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ValidationException</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
    </span><span class="com" style="margin: 0px; padding: 0px;">// validate model object, throw exception if failed</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> execute</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="com" style="margin: 0px; padding: 0px;">// perform action</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> SUCCESS</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

ConversionErrorFieldValidator注释 - （验证译注）：

此验证注解如果有任何转换错误进行了实地检查，并适用于他们，如果他们存在。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="lit" style="margin: 0px; padding: 0px;">@ConversionErrorFieldValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Default message"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
                        key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"i18n.key"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> shortCircuit </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getName</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

DateRangeFieldValidator注释 - （验证译注）：

这验证注解检查日期字段的值在指定范围内。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="lit" style="margin: 0px; padding: 0px;">@DateRangeFieldValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Default message"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"i18n.key"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> shortCircuit </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   min </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"2005/01/01"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> max </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"2005/12/31"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getDOB</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> dob</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

DoubleRangeFieldValidator注释 - （验证译注）：

此验证注解检查双字段有一个值，该值在指定范围内。如果既不最小或最大，什么都不会做的。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="lit" style="margin: 0px; padding: 0px;">@DoubleRangeFieldValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Default message"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"i18n.key"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> shortCircuit </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   minInclusive </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"0.123"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> maxInclusive </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"99.987"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getIncome</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> income</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

EmailValidator注释 - （验证译注）：

这验证注解检查一个字段是一个有效的E-mail地址，如果它包含一个非空的字符串。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="lit" style="margin: 0px; padding: 0px;">@EmailValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Default message"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"i18n.key"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> shortCircuit </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getEmail</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> email</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

ExpressionValidator注释 - （验证译注）：

这种非字段级验证验证所提供的正则表达式。

<span class="lit" style="margin: 0px; padding: 0px;">@ExpressionValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Default message"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"i18n.key"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
shortCircuit </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> expression </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"an OGNL expression"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">)</span>

IntRangeFieldValidator注释 - （验证译注）：

这验证注解检查一个数字字段的值在指定的范围内。如果既不最小或最大，什么都不会做的。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="lit" style="margin: 0px; padding: 0px;">@IntRangeFieldValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Default message"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"i18n.key"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> shortCircuit </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   min </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"0"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> max </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"42"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getAge</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> age</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

RegexFieldValidator 注释 - （验证译注）：

这个注解验证一个字符串字段，使用正则表达式。

<span class="lit" style="margin: 0px; padding: 0px;">@RegexFieldValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"regex.field"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> expression </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"yourregexp"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span>

RequiredFieldValidator 注释 - （验证译注）：

这验证注解检查一个字段不为空。标注必须被应用在方法层面。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="lit" style="margin: 0px; padding: 0px;">@RequiredFieldValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Default message"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"i18n.key"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> shortCircuit </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getAge</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> age</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

RequiredStringValidator注释 - （验证译注）：

这验证注解检查一个字符串字段不为空（即非空，长度> 0）。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="lit" style="margin: 0px; padding: 0px;">@RequiredStringValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Default message"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"i18n.key"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> shortCircuit </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> trim </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getName</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

StringLengthFieldValidator注释 - （验证译注）：

这个验证检查字符串字段是合适的长度。假定该字段是一个字符串。如果设置既不是minLength 也不是最大长度，什么都不会做。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="lit" style="margin: 0px; padding: 0px;">@StringLengthFieldValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Default message"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"i18n.key"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> shortCircuit </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   trim </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> minLength </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"5"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;">  maxLength </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"12"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getName</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

UrlValidator注释 - （验证译注）：

这个验证检查一个字段是一个有效的URL。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="lit" style="margin: 0px; padding: 0px;">@UrlValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"Default message"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   key </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"i18n.key"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> shortCircuit </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getURL</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> url</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

验证注释 - （验证译注）：

如果想使用多个相同类型的注释，这些注释必须嵌套在@Validations() 注释。

<span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Employee</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">

  </span><span class="lit" style="margin: 0px; padding: 0px;">@Validations</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">
   requiredFields </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="lit" style="margin: 0px; padding: 0px;">@RequiredFieldValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">type </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ValidatorType</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">SIMPLE</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
      fieldName </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"customfield"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
      message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"You must enter a value for field."</span><span class="pun" style="margin: 0px; padding: 0px;">)},</span><span class="pln" style="margin: 0px; padding: 0px;">
   requiredStrings </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="lit" style="margin: 0px; padding: 0px;">@RequiredStringValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">type </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ValidatorType</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">SIMPLE</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
      fieldName </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"stringisrequired"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
      message </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"You must enter a value for string."</span><span class="pun" style="margin: 0px; padding: 0px;">)}</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getName</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
       </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

CustomValidator注释 - （验证译注）：

这个注解可以用于自定义验证。使用ValidationParameter的注释，以提供额外的 params.

<span class="lit" style="margin: 0px; padding: 0px;">@CustomValidator</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">type </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"customValidatorName"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> fieldName </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"myField"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span>

转换注释 - （类型转换注释）：

这是一个标记注释类型转换类型级别。转换注释必须应用在类型级别。

<span class="lit" style="margin: 0px; padding: 0px;">@Conversion</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ConversionAction</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">implements</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Action</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

CreateIfNull注释 - （类型转换注释）：

这个注解设置类型转换CreateIfNull。必须应用在域或方法级CreateIfNull注解。

<span class="lit" style="margin: 0px; padding: 0px;">@CreateIfNull</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> value </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">true</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">private</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">List</span><span class="pun" style="margin: 0px; padding: 0px;"><</span><span class="typ" style="margin: 0px; padding: 0px;">User</span><span class="pun" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;"> users</span><span class="pun" style="margin: 0px; padding: 0px;">;</span>

元素注释 - （类型转换注释）：

这个注解设置元素进行类型转换。必须应用在字段域或方法级元素的注解。

<span class="lit" style="margin: 0px; padding: 0px;">@Element</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> value </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> com</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">acme</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">User</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">private</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">List</span><span class="pun" style="margin: 0px; padding: 0px;"><</span><span class="typ" style="margin: 0px; padding: 0px;">User</span><span class="pun" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;"> userList</span><span class="pun" style="margin: 0px; padding: 0px;">;</span>

关键注释 - （类型转换注释）：

这个注解设置进行类型转换的关键。必须应用在域或方法级的关键注解。

<span class="lit" style="margin: 0px; padding: 0px;">@Key</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> value </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> java</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">lang</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">Long</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">private</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">Map</span><span class="pun" style="margin: 0px; padding: 0px;"><</span><span class="typ" style="margin: 0px; padding: 0px;">Long</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">User</span><span class="pun" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;"> userMap</span><span class="pun" style="margin: 0px; padding: 0px;">;</span>

KeyProperty注释 - （类型转换注释）：

这个注解设置类型转换KeyProperty。必须应用在域或方法级KeyProperty注解。

<span class="lit" style="margin: 0px; padding: 0px;">@KeyProperty</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> value </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"userName"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">protected</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">List</span><span class="pun" style="margin: 0px; padding: 0px;"><</span><span class="typ" style="margin: 0px; padding: 0px;">User</span><span class="pun" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;"> users </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">null</span><span class="pun" style="margin: 0px; padding: 0px;">;</span>

TypeConversion注释 - （类型转换注释）：

这个注解的注解是用于类和应用程序的转换规则。注解可以应用于TypeConversion在属性和方法的级别。

<span class="lit" style="margin: 0px; padding: 0px;">@TypeConversion</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">rule </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ConversionRule</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">COLLECTION</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> 
converter </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"java.util.String"</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">void</span><span class="pln" style="margin: 0px; padding: 0px;"> setUsers</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">List</span><span class="pln" style="margin: 0px; padding: 0px;"> users </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">this</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">users </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> users</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

 

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