Posted on 2009-05-14 03:15
H2O 阅读(778)
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ajax
js文件(yizhi_ajax.js)
1
/**//*** 仅作为学习交流之用
2
* 请您勿用于商业用途
3
*/
4 var yizhi_ajax =
{
5 xhr:false,
6 url:"",
7 method:"post",
8 toString:Object.prototype.toString,
9
isArray:function( obj ) {
10 return this.toString.call(obj) === "[object Array]";
11
},
12 isFunction:function( obj ) {
13 return this.toString.call(obj) === "[object Function]";
14 },
15 each:function( object, callback, args ) {
16 var name, i = 0, length = object.length;
17 if ( args ) {
18 if ( length === undefined ) {
19 for ( name in object )
20 if ( callback.apply( object[ name ], args ) === false )
21 break;
22 } else
23 for ( ; i < length; )
24 if ( callback.apply( object[ i++ ], args ) === false )
25 break;
26 } else {
27 if ( length === undefined ) {
28 for ( name in object )
29 if ( callback.call( object[ name ], name, object[ name ] ) === false )
30 break;
31 } else
32 for ( var value = object[0];
33 i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
34 }
35
36 return object;
37 },
38 param:function(a){
39 var s = [ ];
40 function add( key, value ){
41 s[ s.length ] = encodeURIComponent(key) + '=' + encodeURIComponent(value);
42 };
43 if ( this.isArray(a))
44 this.each( a, function(){
45 add( this.name, this.value );
46 });
47
48 else
49 for ( var j in a )
50 if ( this.isArray(a[j]) )
51 this.each( a[j], function(){
52 add( j, this );
53 });
54 else
55 add( j, this.isFunction(a[j]) ? a[j]() : a[j] );
56 return s.join("&").replace(/%20/g, "+");
57 },
58 showMsg:true,
59 getXhr:function(){
60 if(this.xhr==false){
61 try{
62 this.xhr = new ActiveXObject("Microsoft.XMLHTTP");
63 }catch(e){
64 try{
65 this.xhr = new ActiveXObject("Msxml2.XMLHTTP");
66 }catch(e){
67 alert("xhr对象创建失败！");
68 }
69 }
70 }
71 return this.xhr;
72 },
73 send:function(requestUrl,parameters,callBack){
74 if(this.xhr==false){
75 this.getXhr();
76 requestUrl+=("?"+new Date().getTime()); //利用随即生成的时间解决缓存问题
77 this.xhr.open(this.method,requestUrl,true);
78 this.xhr.setRequestHeader('Content-type','application/x-www-form-urlencoded;charset=UTF-8;');
79 this.xhr.send(this.param(parameters));
80 this.xhr.onreadystatechange=function(){
81 if(yizhi_ajax.xhr.readyState ==4){
82 if(this.showMsg){
83 alert("发送完毕");
84 }
85 if(yizhi_ajax.xhr.status==200){
86 if(this.showMsg){
87 alert("请求成功并完成！");
88 }
89 callBack(yizhi_ajax.xhr);
90 yizhi_ajax.xhr=false;
91 }else{
92 if(this.showMsg){
93 alert("服务端返回状态" + yizhi_ajax.xhr.statusText);
94 }
95 }
96 }
97 }
98 }
99 }
100
101 }
index.jsp
1
2
3<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
4<html>
5 <head>
6
7 <title>无聊就要涮锅子</title>
8 <meta http-equiv="content-type" content="text/html;charset=UTF-8">
9 <meta http-equiv="pragma" content="no-cache">
10 <meta http-equiv="cache-control" content="no-cache">
11 <meta http-equiv="expires" content="0">
12 </head>
13 <script type="text/javascript" src="js/yizhi_ajax.js"></script>
14 <script type="text/javascript">
15 var check=function(){
16 var param={
17 name:document.getElementById("uname").value
18 }
19 yizhi_ajax.send("http://127.0.0.1:8080/test/servlet/test",param,function(xhr)
20 {
21 try{
22 var response =eval("(" + xhr.responseText + ")");
23 if(response.is=="yes"){
24 alert("果然你是死锅子，唰，刷刷刷！！！！！！！！！！！！！唰锅子就是爽 O(∩_∩)O哈哈~");
25 }else{
26 alert("你真TMD太令我失望了。。。╮(╯▽╰)╭哎。。。");
27 }
28 }catch(e){
29 }
30 }
31 );
32
33 }
34 </script>
35 <body>
36 请输入您的姓名：<input id="uname">
37 <input type="button" value="你是死锅子吗？" onclick="check();">
38
39 </body>
40</html>
41
servlet文件(test.java URL映射为:/servlet/test 本例子用了json2.3，如需相关jar包请自行搜索过着去官网下载)
package com.yz.test;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONObject;
public class test extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request,response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
Map map = new HashMap();
if("郭照友".equals(URLDecoder.decode(request.getParameter("name")))){
map.put("is","yes");
}else{
map.put("is","no");
}
JSONObject json = JSONObject.fromObject(map);
out.println(json);
} catch (Exception e) {
}
out.flush();
out.close();
}
}