第一種絕對路徑
<form action="${pageContext.request.contextPath }/user/login.action" method="post">第二種
<form action="<%=request.getContextPath() %>/user/login.action" method="post">
第三種 頁面中直接寫以下代碼
<% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";%><base href="<%=basePath%>"><meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<form action="user/login.action" method="post">
提交地址不用改變
五、異常機制
局部異常
package com.pb.web.action;import java.sql.SQLException;import java.util.InputMismatchException;import com.opensymphony.xwork2.ActionSupport;public class HourseAction extends ActionSupport { /** * */ PRivate static final long serialVersionUID = 1L; public String add() throws InputMismatchException{ System.out.println("執行添加操作！"); if(1==1){ //調用service的方法 throw new InputMismatchException(); } return "success"; } public String update() throws NullPointerException{ System.out.println("執行更新操作！"); if(1==1){ //調用service的方法 throw new NullPointerException(); } return "success"; } public String delete() throws SQLException{ System.out.println("執行刪除操作！"); if(1==1){ //調用service的方法 throw new SQLException(); } return "success"; } }
頁面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><form action="hourse_add"><input type="submit" value="添加"/></form><form action="hourse_update"><input type="submit" value="更新"/></form><form action="hourse_delete"><input type="submit" value="刪除"/></form></body></html>
error頁面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags" %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>error.jsp<s:property value="exception"/><s:property value="exceptionStack"/></body></html>
struts.xml
<global-results> <result name="error">/error.jsp</result> </global-results><action name="hourse_add" class="com.pb.web.action.HourseAction" method="add"> <result name="success" type="dispatcher"> /loginSuccess.jsp </result> <exception-mapping result="error" exception="java.util.InputMismatchException"></exception-mapping> </action> <action name="hourse_update" class="com.pb.web.action.HourseAction" method="update"> <result name="success" type="dispatcher"> /loginSuccess.jsp </result> <exception-mapping result="error" exception="java.lang.NullPointerException"></exception-mapping> </action> <action name="hourse_delete" class="com.pb.web.action.HourseAction" method="delete"> <result name="success" type="dispatcher"> /loginSuccess.jsp </result> <exception-mapping result="error" exception="java.sql.SQLException"></exception-mapping> </action>
全局異常更改struts.xml
<?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> <!-- <package name="default" namespace="/" extends="struts-default"> <default-action-ref name="index" /> <global-results> <result name="error">/error.jsp</result> </global-results> <global-exception-mappings> <exception-mapping exception="java.lang.Exception" result="error"/> </global-exception-mappings> <action name="index"> <result type="redirectAction"> <param name="actionName">HelloWorld</param> <param name="namespace">/example</param> </result> </action> </package> <include file="example.xml"/> --> <!-- Add packages here --> <constant name="struts.enable.DynamicMethodInvocation" value="false" /> <constant name="struts.devMode" value="true" /> <package name="base" namespace="/base" extends="struts-default"> <global-results> <result name="error">error.jsp</result> </global-results> <global-exception-mappings> <exception-mapping result="error" exception="java.util.InputMismatchException"></exception-mapping> <exception-mapping result="error" exception="java.lang.NullPointerException"></exception-mapping> <exception-mapping result="error" exception="java.sql.SQLException"></exception-mapping> </global-exception-mappings> </package> <!-- 繼承base包--> <package name="user" extends="base"> <action name="login" class="com.pb.web.action.LoginAction" method="login"> <result name="success" type="dispatcher"> /loginSuccess.jsp<!-- http://www.baidu.com/ --> </result> <result name="input" type="dispatcher"> /login.jsp </result> </action> <action name="hourse_add" class="com.pb.web.action.HourseAction" method="add"> <result name="success" type="dispatcher"> /loginSuccess.jsp </result> </action> <action name="hourse_update" class="com.pb.web.action.HourseAction" method="update"> <result name="success" type="dispatcher"> /loginSuccess.jsp </result> </action> <action name="hourse_delete" class="com.pb.web.action.HourseAction" method="delete"> <result name="success" type="dispatcher"> /loginSuccess.jsp </result> </action> </package></struts>
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