頁面：getAndPostExample.Html
<%@ page contentType="text/Html; charset=GBK" %>
<Html>
<head>
<title>
用GET和POST發送頁面請求
</title>
<script type="text/Javascript">
//XMLHttpRequest對象
var XMLHttp;
//創建XMLHttpRequest對象
function createXMLHttpRequest(){
if (window.ActiveXObject){
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest){
xmlHttp = new XMLHttpRequest();
}
}
//發送參數字符串
function createQueryString(){
//得到姓
var firstName = document.getElementById("firstName").value;
//得到中間名
var middleName = document.getElementById("middleName").value;
//得到生日
var birthday = document.getElementById("birthday").value;
//構造請求字符串
var quertString = "firstName=" + firstName + "&middleName=" + middleName
+ "&birthday=" + birthday;
return quertString;
}
//處理GET請求
function doRequestUsingGET(){
createXMLHttpRequest();
var queryString = "GetAndPostExample?";
queryString = queryString + createQueryString() + "&timeStamp=" + new Date().getTime();
XMLHttp.onreadystatechange = handleStateChange;
XMLHttp.open("GET",queryString,true);
XMLHttp.send(null);
}
//處理POST請求
function doRequestUsingPOST(){
createXMLHttpRequest();
var url = "GetAndPostExample?timeStamp=" + new Date().getTime();
var queryString = createQueryString();
XMLHttp.open("POST",url,true);
XMLHttp.onreadystatechange = handleStateChange;
XMLHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
XMLHttp.send(queryString);
}
//回調方法
function handleStateChange(){
if (XMLHttp.readyState == 4){
if (XMLHttp.status == 200){
//解析返回結果
parseResults();
}
}
}
//解析返回結果
function parseResults(){
var responseDiv = document.getElementById("serverResponse");
if (responseDiv.hasChildNodes()){
responseDiv.removeChild(responseDiv.childNodes[0]);
}
//返回文本構造一個文本節點
var responseText = document.createTextNode(XMLHttp.responseText);
responseDiv.appendChild(responseText);
}
</script>
</head>
<body>
<h1>
輸入你的姓，中間名，和生日:
</h1>
<table>
<tbody>
<tr>
<td>姓:</td>
<td><input type="text" id="firstName"/>
</tr>
<tr>
<td>中間名:</td>
<td><input type="text" id="middleName"/>
</tr>
<tr>
<td>生日：</td>
<td><input type="text" id="birthday"/>
</tr>
</tbody>
</table>
<form action="#">
<input type="button" value="發送GET請求" />
<br /><br />
<input type="button" value="發送POST請求" />
</form>
<br />
<h2>
服務器響應：
</h2>
<div id="serverResponse">
</div>
</body>
</Html>
服務器端處理
GetAndPostExample.Java
import Javax.servlet.*;
import Javax.servlet.http.*;
import Java.io.*;
import Java.util.*;
public class GetAndPostExample
extends HttpServlet {
private static final String CONTENT_TYPE = "text/Html; charset=GBK";
//處理方法
protected void processRequest(HttpServletRequest request,
HttpServletResponse response, String method) throws
ServletException, IOException {
//設置響應內容類別
response.setContentType(CONTENT_TYPE);
//得到參數
String firstName = request.getParameter("firstName");
String middleName = request.getParameter("middleName");
String birthday = request.getParameter("birthday");
//創建響應文本
String responseText = "您好 " + firstName + " " + middleName + ". 您的生日是" + birthday
+ "." + " [傳參方法: " + method + "]";
//傳回浏覽器
PrintWriter out = response.getWriter();
out.println(responseText);
//關閉寫出流
out.close();
}
//Initialize global variables
public void init() throws ServletException {
}
//處理GET方法
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
processRequest(request,response,"GET");
}
//處理POST方法
public void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
processRequest(request,response,"POST");
}
//Clean up resources
public void destroy() {
}
}