日期:2014-05-16 浏览次数:20553 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;