struts actionerror

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web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee           http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><display-name>StrutsTutorial</display-name><filter><filter-name>struts2</filter-name><filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class></filter><filter-mapping><filter-name>struts2</filter-name><url-pattern>/*</url-pattern></filter-mapping><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>      <!DOCTYPE struts PUBLIC          "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"          "http://struts.apache.org/dtds/struts-2.0.dtd"><struts><package name="login" extends="struts-default"><action name="test" class="action.TestAction"><result name="success">/show.jsp</result></action></package></struts>

java

package action;import com.opensymphony.xwork2.ActionSupport;public class TestAction extends ActionSupport{@Overridepublic String execute(){   addActionError("第一条错误消息！");    addActionError("第二条错误消息！");    return SUCCESS;}}

jsp

<%@ page contentType="text/html; charset=utf-8" language="java"%><%@taglib prefix="s" uri="/struts-tags"%><html><head></head><body><s:actionerror /></body></html>