本篇内容主要讲解“jquery怎么访问servlet并返回数据到页面”,感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷,实用性强。下面就让小编来带大家学习“jquery怎么访问servlet并返回数据到页面”吧!
本文实例讲述了jquery访问servlet并返回数据到页面的方法。分享给大家供大家参考。具体实现方法如下:
1. servlet:AjaxServlet.java如下:
复制代码 代码如下:
package com.panlong.servlet;
import java.io.IOException; import java.io.PrintWriter; import java.net.URLDecoder;
import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;
public class AjaxServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { Integer total = (Integer) req.getSession().getAttribute("total"); int temp = 0; if(total == null ){ temp = 1; }else{ temp = total.intValue() + 1; } req.getSession().setAttribute("total",temp); try { //1.取参数 resp.setContentType("text/html;charset=GBK"); PrintWriter out = resp.getWriter(); String old = req.getParameter("name"); //2.检查参数是否有问题 //String name = new String(old.getBytes("iso8859-1"),"UTF-8"); String name = URLDecoder.decode(old,"UTF-8"); if("".equals(old) || old == null){ out.println("用户名必须输入"); }else{ if("liling".equals(name)){ out.println("恭喜登录成功"); return; }else{ out.println("该用户名未注册,您可以注册["+name+"]这个用户名"+temp); } } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } //3.检验操作 } protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); } }
2. verify.js如下:
复制代码 代码如下:
function verify(){
//解决中文乱码问题的方法1,页面端发出的数据作一次encodeURI,服务端使用new String(old.getBytes("iso8859-1"),"UTF-8");
//解决中文乱码问题的方法2,页面端发出的数据作两次encodeURI,服务端使用String name = URLDecoder.decode(old,"UTF-8");
var url = "servlet/AjaxServlet?name="+encodeURI(encodeURI($("#userName").val()));
url = convertURL(url);
$.get(url,null,function(data){
$("#result").html(data);
});
}
//给url地址增加时间蒫,难过浏览器,不读取缓存
function convertURL(url){
//获取时间戳
var timstamp = (new Date()).valueOf();
//将时间戳信息拼接到url上
if(url.indexOf("?") >=0){
url = url + "&t=" + timstamp;
}else{
url = url + "?t=" + timstamp;
}
return url;
}
3. 前台页面如下:
复制代码 代码如下:
<!DOCTYPE html>
<html>
<head>
<title>AJAX实例</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=GBK">
<script type="text/javascript" src="js/verify.js"></script>
<script type="text/javascript" src="js/jquery.js"></script>
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head>
<body>
<font color="blue" size="2">请输入用户名:</font>
<input type="text" id="userName" /><font color="red" size="2"><span id="result" >*</span></font><br/><br/>
<!-- <div id="result"></div> -->
<input type="submit" name="提交" value="提交" onclick="verify()"/>
</body>
</html>
到此,相信大家对“jquery怎么访问servlet并返回数据到页面”有了更深的了解,不妨来实际操作一番吧!这里是编程网网站,更多相关内容可以进入相关频道进行查询,关注我们,继续学习!