原来struts2的和是有顺序的

1.在strtus.xml中配置如下 ~~~~~

```一定要注意```<global-results>要放在<global-exception-mappings>前面`

<global-results>
<result name="unhandledException">/common/systemFail.jsp</result>
<result name="input">/common/headerMsg.jsp</result>
</global-results>
<global-exception-mappings>
<exception-mapping exception="java.lang.Exception" result="unhandledException"/>
<exception-mapping exception="com.xxxx.exception.GuiException" result="input"/>
</global-exception-mappings>

 

GuiException是自定义的Exception

2.完成systemFail.jsp和headerMsg.jsp，headerMsg显示的是知道的Exception,systemFail.jsp显示 unhandle的Exception

systemFail.jsp

<%@ include file="../common/header.jsp" %>
<div style="padding-top:30px">
</div>
<div id="systemFailed" style="text-align:left; padding-left:80px; padding-right:80px;">
<s:property value="exception"/>
</div>
<br/>
<div style="text-align:left; padding-left:80px; padding-right:80px;">
<s:property value="exceptionStack"/>
</div>
<%@ include file="../common/footer.jsp" %>
headerMsg.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<div id="errorMessage" class="errorMessageText">
<s:actionerror/>
<s:actionmessage/>
<s:if test="exception != null">
<s:if test="exception.errorCode != null">
<s:set name="errorCode" value="exception.errorCode"/>
<s:set name="args" value="exception.args"/>
<s:text name="${errorCode}">
<c:forEach var="arg" items="${args}">
<s:param>${arg}</s:param>
</c:forEach>
</s:text>
</s:if>
<s:else>
<s:property value="exception.message"/>
</s:else>
</s:if>
</div>

 

这里的Exception已经是自定义的GUIException(在struts.xml中配置过了),所以直接从里面取信息 (args,errCode...)

3. 在Action中trhows GuiException,然后strtus2会默认使用exception的interceptor将Action中抛 出的GUIException拦截,然后匹配xml文件,这样就完成了错误处理.

总结：
还是利用了struts2的interceptor机制，方便的拦截了异常.