servlet+ajax

fhqiwcw · 发表于 2013-2-7 22:22:47

点击后

servlet代码：
package com.fhqiwcw.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;/** * Servlet implementation class AjaxServlet */public class AjaxServlet extends HttpServlet {private static final long serialVersionUID = 1L;/** * @see HttpServlet#HttpServlet() */public AjaxServlet() {super();// TODO Auto-generated constructor stub}/** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse * response) */protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/xml");response.setHeader("Cache-Control", "no-cache");PrintWriter out = response.getWriter();out.write("<class>");out.write("<student>");out.write("<name>fhqiwcw</name>");out.write("<age>20</age>");out.write("</student>");out.write("<student>");out.write("<name>zhaojun</name>");out.write("<age>20</age>");out.write("</student>");out.write("</class>");}/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse * response) */protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stub}}
页面代码：
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%><%String path = request.getContextPath();String basePath = request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ path + "/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><base href="<%=basePath%>"><title>My JSP 'MyJsp.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"><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><script type="text/javascript">var xmlhttp;function loadXMLDoc(url) {xmlhttp = null;if (window.XMLHttpRequest) {// code for Firefox, Opera, IE7, etc.xmlhttp = new XMLHttpRequest();} else if (window.ActiveXObject) {// code for IE6, IE5xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");}if (xmlhttp != null) {xmlhttp.onreadystatechange = state_Change;xmlhttp.open("GET", url, true);xmlhttp.send(null);} else {alert("Your browser does not support XMLHTTP.");}}function state_Change() {if (xmlhttp.readyState == 4) {// 4 = "loaded"if (xmlhttp.status == 200) {// 200 = "OK"var xmlRoot = xmlhttp.responseXML;document.getElementById('T1').innerHTML = xmlRoot.getElementsByTagName("name")[0].text;} else {alert("Problem retrieving data:" + xmlhttp.statusText);}}}</script></head><body><div id="T1"style="border: 1px solid black; height: 40; width: 300; padding: 5"></div><br /><button >Click</button><a href="AjaxServlet">submit </a></body></html> web.xml
<servlet> <description></description> <display-name>AjaxServlet</display-name> <servlet-name>AjaxServlet</servlet-name> <servlet-class>com.fhqiwcw.servlet.AjaxServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>AjaxServlet</servlet-name> <url-pattern>/AjaxServlet</url-pattern> </servlet-mapping>

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servlet+ajax

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