struts2+jquery 实现ajax登陆

一、新建一个web项目：test,配置好struts2的环境(详细配置见：http://www.cnblogs.com/wuweidu/p/3841297.html)

导入Jquery的js文件到项目

二、在com.action包下，新建一个loginAction.java

loginAction.java的代码如下

package com.action;import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;import com.opensymphony.xwork2.ActionSupport;@Action("login")
@ParentPackage(value = "json-default")
@Results({ @Result(name = "success", type = "json", params = { "data", "flag" }), })
public class LoginAction extends ActionSupport {/*** */private static final long serialVersionUID = 1751244794407005783L;private String flag;private String username;private String password;public String execute() {try {if (getUsername() == null || getUsername().trim().equals("")) {setFlag("用户名不能为空");return SUCCESS;} else if (getPassword() == null || getPassword().trim().equals("")) {setFlag("密码不能为空");return SUCCESS;} else if (getUsername().trim().equals("admin")&& getPassword().equals("admin")) {setFlag("登陆成功");return SUCCESS;} else {setFlag("用户名或密码错误");return SUCCESS;}} catch (Exception e) {e.printStackTrace();setFlag("登陆异常");return SUCCESS;}}public String getFlag() {return flag;}public void setFlag(String flag) {this.flag = flag;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}}

三、在WebRoot目录下新建index.jsp和success.jsp

index.jsp登陆界面 success.jsp登陆成功后跳转的界面

index.jsp内容如下

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%String path = request.getContextPath();String basePath = request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ path + "/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"><title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="./resource/js/jquery.min.js"></script>
</head>
<script type="text/javascript">$(document).ready(function() {$(".loginButton").click(function() {var name = $("#username").val();//获取登陆用户名var password = $("#password").val(); //获取登陆密码$.post("login", {username : name,password : password}, callback, "json");});function callback(data) {var value=data.flag;if(value=="登陆成功"){location.href="./success.jsp";}else{
             alert(value);}});
</script>
<body><input name="username" id="username" type="text" /><input name="password" id="password" type="password" /><button class="loginButton" class="btn btn-inverse">登陆</button>
</body>
</html>