struts2捕获action类异常

首先是STRUTS.XML的配置。重点在于配置文件：

<!-- struts2捕获action类异常 -->

        <global-results>

<result name="error">/error.jsp</result>

</global-results>

<global-exception-mappings>

<exception-mapping result="error" exception="java.lang.Exception"></exception-mapping>

</global-exception-mappings>

这样一块。

<?xml version="1.0" encoding="UTF-8" ?
 
>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">
 
<struts>
 
  <!--   採用注解的方式 -->
 
  	<constant name="struts.enable.DynamicMethodInvocation" value="true" />
    <constant name="struts.devMode" value="true" /> 
 
    <package name="default" namespace="" extends="struts-default">
        <!-- struts2捕获action类异常 -->
        <global-results>
			<result name="error">/error.jsp</result>
		</global-results>
		<global-exception-mappings>
			<exception-mapping result="error" exception="java.lang.Exception"></exception-mapping>
		</global-exception-mappings>
    	<action name="link" class="com.test.action.LoginAction">
    	    <result>/result.jsp</result>
    	</action>
    	<action name="linkIOC" class="com.test.action.LoginActionIOC">
    	    <result>/result.jsp</result>
    	</action>
    </package>
 
    <!-- Add packages here -->
 
</struts>

測试类

package com.test.action;
 
import java.util.Map;
 
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
 
public class LoginAction extends ActionSupport{
 
	/**
	 *
	 */
	private static final long serialVersionUID = 1L;
 
	private Map request;
	private Map session;
	private Map application;
 
	public LoginAction()
	{
		System.out.println("loginaction构造函数！");
		request=(Map) ActionContext.getContext().get("request");
		session=ActionContext.getContext().getSession();
		application=ActionContext.getContext().getApplication();
	}
 
	public String execute()
	{
		//System.out.println(request);
		//System.out.println(session);
		//System.out.println(application);
 
		int i=100/0;/*这个地方会抛出异常，默认情况下struts2是不会捕获异常，直接抛出*/
 
		request.put("msg", "欢迎你！");
		return SUCCESS;
	}
 
}

输出结果