struts 2.0 hello world demo

╰半橙微兮° 2022-06-18 01:24 171阅读 0赞

1. 在 web.xml 加入以下代码：

<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>

2. 在scr 目录下创建名为struts 的xml 文件：

**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>  
<include file="/struts-basic.xml"></include>  
<include file="/com/itcast/test/config/test-struts.xml"></include>  
</struts>

3.对struts.xml进行扩展，struts-basic.xml存放一些基本配置信息（如：异常处理）, \*-struts.xml存放具体的处理信息：

**struts-basic.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="basic" extends="struts-default">  
<global-results>  
<result name="exception">/jsp/common/exception.jsp</result>  
</global-results>  
  
<global-exception-mappings>  
<exception-mapping result="exception" exception="java.lang.RuntimeException"></exception-mapping>  
</global-exception-mappings>  
</package>  
</struts>  
  
**test-struts.xml**

4.创建具体的处理文件：

**LoginAction.java**

package com.itcast.test.action;  
  
import com.opensymphony.xwork2.ActionSupport;  
  
public class LoginAction extends ActionSupport \{  
  
private static final long serialVersionUID = 1L;  
  
@Override  
public String execute() throws Exception \{  
return "TEST\_SUCCESS";  
\}  
\}

5. jsp 文件：

**test1.jsp**

<%@ 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>test</title>  
</head>  
<body>  
  
<a href="http://localhost:8088/alex\_shop2/test/login.action">login</a>  
  
</body>  
</html>

**test2.jsp**

<%@ 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>test2</title>  
</head>  
<body>  
hello world  
</body>  
</html>

页面流为: test1.jsp -> click "login" -> test2.jsp(show "hello world")