用AJAX的Get和Post调用Servlet的简单示例。
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***************************************AJAX网页代码****************
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script language="javascript">
var xmlHttp;
function createXMLHttpRequest()
if(window.ActiveXObject)
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
else if(window.XMLHttpRequest)
xmlHttp=new XMLHttpRequest();
function createQueryString()
var firstName=document.getElementById("firstname").value;
var middleName=document.getElementById("middleName").value;
var birthday=document.getElementById("birthday").value;
var queryString="firstName=" + firstName + "&middleName=" + middleName + "&birthday=" + birthday;
return queryString;
function doRequestUsingGET()
createXMLHttpRequest();
var queryString="../GetAndPost?";
queryString=queryString+createQueryString() + "&timeStamp=" + new Date().getTime();
xmlHttp.onreadystatechange=handleStateChange;
xmlHttp.open("GET",queryString,true);
xmlHttp.send(null);
function doRequestUsingPost()
createXMLHttpRequest();
var url="../GetAndPost?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);
function handleStateChange()
if(xmlHttp.readyState==4)
if(xmlHttp.status==200)
parseResults();
function parseResults()
var responseDiv=document.getElementById("serverResponse");
if(responseDiv.hasChildNodes())
responseDiv.removeChild(responseDiv.childNodes[0]);
var responseText=document.createTextNode(xmlHttp.responseText);
responseDiv.appendChild(responseText);
</script>
</head>
<body>
<form id="form1" name="form1" method="post" action="#">
<p><br />
<br />
<input name="firstName" type="text" id="firstName" />
</p>
<p>
<label>
<input type="text" name="middleName" id="middleName" />
</label>
</p>
<p>
<input name="birthday" type="text" id="birthday" />
</p>
<p> </p>
<p>
<input type="button" name="Submit" value="GET" οnclick="doRequestUsingGET();"/>
<input type="button" name="Submit2" value="POST" οnclick="doRequestUsingPost();"/>
</p>
<div id="serverResponse"></div>
</form>
</body>
</html>
***********************************Servlet代码*****************
package temp;
import java.io.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class GetAndPostExample extends HttpServlet
protected void processRequest(HttpServletRequest request,HttpServletResponse response,String method) throws ServletException,IOException
response.setContentType("text/xml");
String firstName=request.getParameter("firstName");
String middleName=request.getParameter("middleName");
String birthday=request.getParameter("birthday");
String responseText="hello:" + firstName + "-" + middleName + "。your birthday is " + birthday + "。" + "[method:" + method + "]";
PrintWriter out=response.getWriter();
out.println(responseText);
out.close();
protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
processRequest(request,response,"GET");
protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
processRequest(request,response,"POST");
**************************
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