util

Map attibutes = ActionContext.getContext().getSession();1.date

private static DateFormat DF = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM);

2.在页面显示日期：

<s:date name="#myDate.now" format="yyyy/MM/dd hh:mm:ss" />(struts2) myDate是Action,now是属性
<s:date name="#myDate.future" nice="true"/

 

2. <s:iterator value="new int[3]" status="stat">

 

3.List<OperationsEnum>   list= Arrays.asList(OperationsEnum.values());

 

4.在页面中调用一个方法：（这个方法在Action中。由action转发到的页面）

<s:checkboxlist label="Operations"
      name="selectedOperations"
      list="%{availableOperations}"     //getAvailableOperations这个是action里的方法，获取list的值。
      listKey="name()"
      listValue="name()"
      />

5    String str = String.format("%04d", youNumber);

---------------------------

 

6 struts2:   HttpSession se=ServletActionContext.getRequest().getSession();

 

7.Map attibutes = ActionContext.getContext().getSession(); 它里面的值和session中的值相同(ThreadLocal)

 

 8.Map<String, ResultConfig> resultsMap = invocation.getProxy().getConfig().getResults();

               //在自定义的interceptor中获取result

9.invocation.addPreResultListener(new PreResultListener() {

         public void beforeResult(ActionInvocation invocation, String resultCode) {
           Map resultsMap = invocation.getProxy().getConfig().getResults();
           ResultConfig finalResultConfig = (ResultConfig)resultsMap.get(resultCode);
            System.out.println(finalResultConfig.getName());
             // do something interesting with the 'to-be' executed result

           }

         });

 

10.7.How can we force the Action Mappings (struts.xml) to reload
devMode=true或者struts.configuration.xml.reload=true

 

11.运行时获取request
HttpServletRequest request = ServletActionContext.getRequest();
或者实现ServletRequestAware并且加入servlet-config拦截器.
13.获取提交的request parameters
Map parameters = ActionContext.getContext().getParameters();
实现ParameterAware并且加入servlet-config拦截器

12.运行时获取response
HttpServletResponse response = ServletActionContext.getResponse()
或者实现ServletResponseAware并且加入servlet-config拦截器.

14.访问action配置中定义的参数
直接在action中定义对应action中参数名的settermethod,或者定义setParams(Map)来实现.

 

15.Prepare 拦截器最好在validation拦截器之前,否则可能被打断.

 

24.如何定义全局properties文件
struts.custom.i18n.resources=global-messages, image-messages

 

http://myoldman.iteye.com/blog/176670

29.为jsp页面添加jsp标签的支持
在web.xml中添加如下定义

<servlet>
    <servlet-name>jspSupportServlet</servlet-name>
     <servlet-class>org.apache.struts2.views.JspSupportServlet</servlet-class>
     <load-on-startup>10</load-on-startup>
</servlet>