AJAX案例三：处理XML响应 

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
 3 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 4 <html>
 5   <head>
 6     <meta http-equiv="pragma" content="no-cache">
 7     <meta http-equiv="cache-control" content="no-cache">
 8     <meta http-equiv="expires" content="0">    
 9     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
10     <meta http-equiv="description" content="This is my page">
11 <script type="text/javascript">
12 function createXMLHttpRequest() {
13     try {
14         return new XMLHttpRequest();
15     } catch (e) {
16         try {
17             return ActvieXObject("Msxml2.XMLHTTP");
18         } catch (e) {
19             try {
20                 return ActvieXObject("Microsoft.XMLHTTP");
21             } catch (e) {
22                 alert("用的是什么浏览器啊？");
23                 throw e;
24             }
25         }
26     }
27 }
28 window.onload = function() {
29     var btn = document.getElementById("btn");
30     btn.onclick = function() {
31         var xmlHttp = createXMLHttpRequest();
32         xmlHttp.open("GET", "<c:url value='/AServlet'/>", true);
33         xmlHttp.send(null);
34         xmlHttp.onreadystatechange = function() {
35             if(xmlHttp.readyState == 4 && xmlHttp.status == 200) {
36                 //改成XML
37                 var doc = xmlHttp.responseXML;
38                 var age,name;
39                 //DOM解析
40                 var stu=doc.getElementsByTagName("student")[0];
41                 if(window.addEventListener) {
42                     name=stu.getElementsByTagName("name")[0].textContent;//其他浏览器
43                     age=stu.getElementsByTagName("age")[0].textContent;
44                 } else {
45                     name=stu.getElementsByTagName("name")[0].text;//IE支持
46                     age=stu.getElementsByTagName("age")[0].text;
47                 }
48                 var text = "姓名："+name+",年龄:"+age;
49                 var h1=document.getElementById("h1");
50                 h1.innerHTML = text;
51             }
52         };
53     };
54 };
55 </script>
56 </head>
57     <body>
58         <button id="btn">点击这里</button>
59         <h1 id="h1"></h1>
60     </body>
61 </html>
 1 import java.io.IOException;
 2 import javax.servlet.ServletException;
 3 import javax.servlet.http.HttpServlet;
 4 import javax.servlet.http.HttpServletRequest;
 5 import javax.servlet.http.HttpServletResponse;
 6 public class AServlet extends HttpServlet {
 7     public void doGet(HttpServletRequest request, HttpServletResponse response)
 8             throws ServletException, IOException {
 9         //改成xml
10         response.setContentType("text/xml;charset=utf-8");
11         request.setCharacterEncoding("UTF-8");
12         String s= "<student>" +
13                     "<name>张三</name>" +
14                     "<age>18</age>" + 
15                   "</student>";
16         response.getWriter().print(s);
17     }
18 }

 

posted @ 2016-11-20 22:10  凌晨。。。三点  阅读(279)  评论(0)    收藏  举报