用ajax作的HelloWorld
日期：2014-05-16 浏览次数：20833 次
用ajax做的HelloWorld
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'ajax.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">
<script type="text/javascript">
function ajaxSubmit()
{
var xmlHttpRequest = null;//声明一个对象以接受XmlHttpRequest对象
if(window.ActiveXObject)//IE浏览器
{
xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest)//除IE外的其它浏览器
{
xmlHttpRequest = new XMLHttpRequest();
}
if(null != xmlHttpRequest)
{
xmlHttpRequest.open("GET","AjaxServlet",true);
//关联好ajax的回调函数
xmlHttpRequest.onreadystatechange = ajaxCallback;
//真正向服务器发送数据
xmlHttpRequest.send(null);
}
function ajaxCallback()
{
if(xmlHttpRequest.readyState==4){
if(xmlHttpRequest.status==200){
var responseText = xmlHttpRequest.responseText;
document.getElementById("div1").innerHTML = responseText;
}
}
}
}
</script>
</head>
<body>
<input type="button" value="返回值" onclick="ajaxSubmit();">
<div id="div1"></div>
</body>
</html>
?
package com.javasky.servlet;
import java.io.IOException;
import java.io.PrintWriter;
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;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out = response.getWriter();
System.out.println("doGet invoked!");
out.println("Hello World");
out.flush();
}
}
?
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