Ajax的简单封装应用
Ajax已经是很古老的话题了,可对于我这类的菜鸟来说"车轮"还是很有必要来造的,通过几个月来的工作体验,让我深深的感受到了基础的重要性,有一个人之前跟我说过这样一句话"当你有一天真正感受到基础的重要性时,那么你就逐步在走向更高层次的迈进",那会我是不以为然,而今让我深受体会,也在其中栽了大跟头,......今天这里就来做一下简单的Ajax封装类的应该!!!
这是Servlet代码:
package com.huawei.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;/** * * @name 何枫 * @date 2011-3-23 * @action AjaxServlet.java * @time 下午11:47:06 * @package_name com.huawei.servlet * @project_name ajaxTest */public class AjaxServlet extends HttpServlet {private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {System.out.println("doGet方式来请求");process(request, response);}//抽取方法()private void process(HttpServletRequest request,HttpServletResponse response) throws IOException {String v1 = request.getParameter("v1");String v2 = request.getParameter("v2");System.out.println("v1=" + v1 +", v2=" + v2);String v3 =String.valueOf(Integer.valueOf(v1)+Integer.valueOf(v2));PrintWriter out = response.getWriter();//try {//Thread.sleep(5000);//} catch (InterruptedException e) {//// TODO Auto-generated catch block//e.printStackTrace();//}//System.out.println("doGet方法调用!!!");//清空缓存的小技巧response.setHeader("pragma", "no-cache");response.setHeader("cache-control", "no-cache;");out.print(v3);out.flush();}/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */protected void doPost(HttpServletRequest request, HttpServletResponseresponse) throws ServletException, IOException {System.out.println("doPost方式来请求");this.process(request, response);}}<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><html><head><meta http-equiv="pragma" content="no-cache; charset=ISO-8859-1"><meta http-equiv="cache-control" content="no-cache; charset=ISO-8859-1"><title>Insert title here</title><script type="text/javascript">//var xmlHttpRequest = null; //声明一个空对象以接收XMLHttpRequest对象/*function Ajax(){ if(window.ActiveXObject) //IE浏览器{xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");}else if(window.XMLHttpRequest) //除IE外的其他浏览器实现{xmlHttpRequest = new XMLHttpRequest();} //xmlHttpRequest = window.XMLHttpRequest ? new ActiveXObject("Microsoft.XMLHTTP"):new XMLHttpRequest() ;if(null != xmlHttpRequest){v1 = document.getElementById("value1ID").value;v2 = document.getElementById("value2ID").value;//Servlet doGet方式来请求//xmlHttpRequest.open("GET","AjaxServlet?v1=" + v1 + "&v2=" + v2,true);xmlHttpRequest.open("POST","AjaxServlet",true);//关联好ajax的回调函数xmlHttpRequest.onreadystatechange = ajaxCallback;//真正向服务器端发送数据//xmlHttpRequest.send(null);//Servlet doPost方式来请求//用doPost提交必须加上如下一行xmlHttpRequest.setRequestHeader("Content-Type","application/x-www-form-urlencoded");xmlHttpRequest.send("v1=" + v1 + "&v2=" + v2);} }*/ function ajax(getorpost,url,data){ var xmlHttpRequest; if(window.ActiveXObject){ //IE浏览器 xmlHttpRequest=new ActiveXObject("Microsoft.XMLHTTP"); } else{//除IE外的其他浏览器实现 xmlHttpRequest = new XMLHttpRequest(); } var statechange = function(){ if(xmlHttpRequest.readyState == 4){if(xmlHttpRequest.status == 200){var responseText = xmlHttpRequest.responseText;document.getElementById("div1").innerHTML=responseText;}} }; //关联好ajax的回调函数 xmlHttpRequest.onreadystatechange = statechange; if(getorpost=="post"){ xmlHttpRequest.open(getorpost,"AjaxServlet ",true); //用doPost提交必须加上如下一行 xmlHttpRequest.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); xmlHttpRequest.send("v1=" + v1 + "&v2=" + v2); } //Servlet doGet方式来请求 else if(getorpost=="get"){ xmlHttpRequest.open(getorpost,url,true); //真正向服务器端发送数据 xmlHttpRequest.send(null); } }function test(){ v1 = document.getElementById("value1ID").value;v2 = document.getElementById("value2ID").value;var URL= "AjaxServlet?v1=" + v1 + "&v2=" + v2; new ajax("get",URL,true);} </script></head><body><input type="button" value="get content from server" onclick="test();"><br/><input type="text" name="value1" id="value1ID"><br/><input type="text" name="value2" id="value2ID"><br/><div id="div1"></div> </body></html>servlet的dopost方法/* * 清除页面缓存!!! */response.setHeader("pragma", "no-cache");response.setHeader("cache-control", "no-cache");int parm1 = Integer.parseInt(request.getParameter("parm1"));int parm2 = Integer.parseInt(request.getParameter("parm2"));PrintWriter out = response.getWriter();out.print(String.valueOf(parm1+parm2));out.flush();======================================================<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><%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 'index.jsp' starting page</title><script type="text/javascript" src="javascript/jquery-1.4.3.js"></script> <script type="text/javascript">$(document).ready(function(){$("#button1").click(function(){//alert("EEE");$.ajax({url: "jsonServlet",type: "GET",dateType: "html",data: {'parm1':$("#parm1").val(), 'parm2':$("#parm2").val()},success: function(returnedData){$("#text1").val(returnedData);}});});});</script> </head> <body> <input type="text" id="parm1"/>+ <input type="text" id="parm2"/>= <input type="text" id="text1" /> <input type="button" id="button1" value="ckick Servlet"> </body></html>