SSH快速进阶——Struts2简单实例

时间：2015-07-29 09:08:48 阅读：167 评论：0 收藏：0 [点我收藏+]

标签：struts struts2 ssh struts2实例

最近刚刚入门struts2，这里做一个简单的struts2实例来跟大家一起学习一下。

本例实现最简单的登陆，仅包含两个页面：login.jsp 用来输入用户名和密码；success.jsp 为登陆成功页面；error.jsp为登陆失败页面。

1、新建web项目“struts2”

2、引入jar包

下载struts2所需jar包 struts-2.3.24-all.zip

解压后将如下最基本的jar包导入到WebRoot/WEB-INF/lib下

技术分享

3、在WebRoot下建立页面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>  
  <body>
  <form action="login">
    username:<input type="text" name="username" /><br>
    password:<input type="password" name="password" /><br>
    <input type="submit" value="submit" /><br>
  </form>   
  </body>
</html>

success.jsp：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>
  <body>
  恭喜您：${requestScope.username} 登陆成功<br/>
  </body>
</html>

error.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head> 
  <body>
    登陆失败
  </body>
</html>

3、配置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></display-name> 
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>

  <!-- 此Filter目的是设置所有的请求都由Struts2来处理 -->
  <filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern><!-- 所有请求都由Struts2来处理 -->
  </filter-mapping>
</web-app>

4、建立action

package com.danny.user.action;

public class LoginAction {
    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;
    }

    public String execute() {
        if("admin".equals(username) && "admin".equals(password))
        {
            return "success";
        }else{
            return "error";
        }
    }
}

5、配置struts.xml

在src目录下建立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="struts2" extends="struts-default">
        <!-- extends是继承的意思，struts-default位于struts2-core-2.3.24.jar.struts-default.xml -->
            <action name="login" class="com.danny.user.action.LoginAction">
            <result name="success">/success.jsp</result>
            <result name="error">/error.jsp</result>
            </action>
        </package>          
    </struts>