第一次使用Struts2框架实现的Java web程序 -

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第一次使用Struts2框架实现的Java web程序

Web Java 框架 Struts JSP

各文件所在位置截图

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">
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>
  <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>
</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="default" extends="struts-default">
	    <!-- for LoginAction.class lies in package demo, so has demo.LoginAction -->
		<action name="login" class="demo.LoginAction"> 
			<result name="error">/error.jsp</result>
            <result name="success">/welcome.jsp</result>
		</action>
	</package>
</struts>

LoginAction.java

package demo;
import com.opensymphony.xwork2.ActionSupport;  //use ActionSupport.class in this package

public class LoginAction extends ActionSupport{
	private String username;
	private String password;
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	
	//Define method execute()
	public String execute(){
		if(getUsername().equals("admin")&&getPassword().equals("admin")){
			return "success";
		}
		else{
			return "error";
		}
		
	}

}

login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
  <head>
    <title>登录页面</title>
  </head>
  <body>
    <form action="login.action" method="post">
        用户：<input type="text" name="username"><br>
        密码：<input type="text" name="password"><br>
        <input type="submit" value="登录">
        <input type="reset" value="取消">
    </form><br>
  </body>
</html>

error.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<html>
<head><title>登录失败！</title></head>
<body>
    登录失败！
</body>
</html>

welcome.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head><title>登录成功！</title></head>
<body>
    <s:property value="username"/>已经登录成功!
</body>
</html>