日期:2014-05-16 浏览次数:20482 次
最近学习了ajax的异步调用和刷新技术,就实践了一把。也借鉴了别人的方法,再加入自己的思路,就有了下面的东东```有任何疑问,就留言吧````
首先是前台的jsp页面
关于jquery的post方法大家可以去看看这个,写的很详细:http://www.itivy.com/jquery/archive/2011/7/6/jquery-get-post-getjson-ajax.html
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@taglib uri="/struts-tags" prefix="s"%> <% 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 'register.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="jquery-1.9.1.js"></script>//引进Jquery库 <script type="text/javascript"> jQuery(function() { $("#username").blur(function() { var username= $.trim($("#username").val()); $.post("checkusername.action",{username:username},function(date,state) { if(date.result=="ok") { $("#span1").html("<font color=\"red\">用户名可以使用</font>"); document.getElementById("submit").removeAttribute("disabled"); }else { $("#span1").html("<font color=\"red\">用户名不可以使用</font>"); document.getElementById("submit").disabled = "true"; } //alert(date.result);警告不好看,太吓人了 return false;},'json'); }); }); </script> </head> <body> <form action="savePerson.action" method="post" > username:<input type="text" name="username" size="20" id="username"> <span id="span1"></span> <br> password:<input type="password" name="password" size="20"><br> age: <input type="text" name="age" size="20"><br> <input type="submit" value="提交" id="submit" disabled="disabled"> </form> </body> </html>因为是使用的是struts2框架所以struts2里面加上如下代码:因为数据是采用接送传输的所以要写成extends="json-default"
<package name="strutsjson" extends="json-default"> <action name="checkusername" class="com.liumin.action.CheckUsername" method="CheckPerson"> <result type="json"></result> </action> </package>action里面的代码如下
package com.liumin.action; import java.util.List; import com.liumin.model.Person; import com.liumin.service.impl.CheckService; import com.opensymphony.xwork2.ActionSupport; public class CheckUsername extends ActionSupport { private String username;//前台传来的数据username public String getUsername() { return username;