文本儀一個實例講述了struts2+jquery實現ajax登陸的實現方法，具體步驟如下：
一、新建一個web項目，取名test。配置好struts2的環境,并導入Jquery的js文件到該項目。
二、在com.action包下，新建一個loginAction.java
loginAction.java的代碼如下
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("用戶名不能為空");
return SUCCESS;
} else if (getPassword() == null || getPassword().trim().equals("")) {
setFlag("密碼不能為空");
return SUCCESS;
} else if (getUsername().trim().equals("admin")
getPassword().equals("admin")) {
setFlag("登陸成功");
return SUCCESS;
} else {
setFlag("用戶名或密碼錯誤");
return SUCCESS;
}
} catch (Exception e) {
e.printStackTrace();
setFlag("登陸異常");
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目錄下新建index.jsp和success.jsp
index.jsp為登陸界面，success.jsp為登陸成功后跳轉的界面。
index.jsp內容如下：
%@ 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%>" rel="external nofollow" >
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();//獲取登陸用戶名
var password = $("#password").val(); //獲取登陸密碼
$.post("login", {
username : name,
password : password
}, callback, "json");
});
function callback(data) {
var value=data.flag;
if(value=="登陸成功"){
location.href="./success.jsp" rel="external nofollow" ;
}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">登陸/button>
/body>
/html>
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