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ajax和servlet的整合配置

Posted on 2010-10-05 00:29 石子路口 阅读(1874) 评论(0)  编辑  收藏 所属分类: 网页制作网络教学资源平台
   刚开始学习ajax,选择了ajax和servlet的整合,初学者可参考,下面上代码。
ajax.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    
<head>
        
<title>ajax测试</title>
    
</head>

    
<body>

        
<script type="text/javascript">
            
function ajaxFunction()
            
{
                
var xmlHttp;
                
try
                
{
                    
//Fiexfox, Opera 8.0+, safari
                    xmlHttp = new XMLHttpRequest();
                }

                
catch(e)
                
{
                    
//ie
                    try
                    
{
                        xmlHttp 
= new ActiveXObject("Msxm12.XMLHTTP");
                    }

                    
catch(e)
                    
{
                        
try
                        
{
                            xmlHttp 
= new ActiveXObject("Microsoft.XMLHTTP");
                        }

                        
catch(e)
                        
{
                            alert(
"您的浏览器不支持AJAX! ");
                            
return false;
                        }

                    }

                }

                
                xmlHttp.onreadystatechange 
= function()
                
{
                    
if(xmlHttp.readyState == 4)
                    
{
                        
//document.myForm.time.value = xmlHttp.responseText;
                        
                        
var text = xmlHttp.responseText;
                        
var strings = text.split(",");
                        
var name = strings[0];
                        
var number = strings[1];
                        document.myForm.name.value 
= name;
                        document.myForm.time.value 
= number;
                        setTimeout(
"load()"1000);
                    }

                }

                
                xmlHttp.open(
"GET","servlet/getInfo",true);
                xmlHttp.send(
null);
            }

            
        
</script>
        
        
<form name="myForm">
        
<table align="center">
            
<tr><td colspan="2"><input type="text" onblur="ajaxFunction();" value="从本文本框失去焦点则触发ajax" size="30" style="color:red;"/> </td></tr>
            
<tr>
            
<td>名称: </td>
            
<td><input type="text" name="name" /></td>
            
</tr>
            
<tr>
            
<td>数量: </td>
            
<td><input type="text" name="time" /></td>
            
</tr>
        
</table>
        
</form>
    
</body>
</html>

GetInfo.java(servlet):
 1package servlet;
 2
 3import java.io.IOException;
 4import java.util.Random;
 5
 6import javax.servlet.ServletException;
 7import javax.servlet.http.HttpServlet;
 8import javax.servlet.http.HttpServletRequest;
 9import javax.servlet.http.HttpServletResponse;
10
11public class GetInfo extends HttpServlet
12{
13    @Override
14    public void doGet(HttpServletRequest req, HttpServletResponse resp)
15            throws ServletException, IOException
16    {
17        resp.setContentType("text/xml;charset=utf-8");
18        resp.setCharacterEncoding("utf-8");
19        resp.setHeader("Cache-Control""no-cache");
20        String name[] = {"java程序设计","数据库基础","软件工程"};
21        
22        String str = name[new Random().nextInt(name.length)] + "," + new Random().nextInt(1000);
23        System.out.println("字符串: " + str);
24        
25        resp.getWriter().write(str);
26        resp.getWriter().flush();
27    }

28    
29    @Override
30    public void doPost(HttpServletRequest req, HttpServletResponse resp)
31            throws ServletException, IOException
32    {
33        // TODO Auto-generated method stub
34        doGet(req, resp);
35    }

36}

37
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi
="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation
="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
>

    
<servlet>
        
<servlet-name>getInfo</servlet-name>
        
<servlet-class>servlet.GetInfo</servlet-class>
    
</servlet>
    
    
<servlet-mapping>
        
<servlet-name>getInfo</servlet-name>
        
<url-pattern>/servlet/getInfo</url-pattern>
    
</servlet-mapping>

    
<welcome-file-list>
        
<welcome-file>index.jsp</welcome-file>
    
</welcome-file-list>
</web-app>
运行结果截图:


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