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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>Óû§Ð£ÑéajaxʵÀý</title>
     <!-- ajax·½Ê½Ï²»ÐèҪʹÓÃ±íµ¥À´½øÐÐÊý¾ÝÌá½»£¬Òò´Ë²»ÓÃд±íµ¥±êÇ©form -->
     <!-- ajax·½Ê½²»ÐèÒªnameÊôÐÔ£¬ÐèÒªÒ»¸öidÊôÐÔ -->
    <script type="text/javascript" src="js/validatexmlajax.js"></script>
</head>
<body>
    Óû§ÃûУÑéAJAXʵÀý£¬ÇëÊäÈëÓû§Ãû£º</br>
    <input type="text" id="userName"><br>
    <input type="button" value="¼ì²é" onclick="validatexmlajax()">
    <!--Õâ¸ödivÓÃÓÚ´æ·Å·þÎñÆ÷·µ»ØµÄÐÅÏ¢£¬¿ªÊ¼Îª¿Õ-->
     <!--idÊôÐÔ¶¨ÒåÊÇΪÁËÀûÓÃdomµÄ·½Ê½ÕÒµ½Ä³Ò»½Úµã£¬½øÐвÙ×÷-->
    <div id="result"></div>
    <!--<div id="result"></div><div>456</div>-->
    <!--<span>123</span><span>456</span>-->
    <!--divºÍspanµÄÖ±¹Û²îÒ죬divÖеÄÄÚÈݶÀÕ¼ÐУ¬span»áºÍǰºóÄÚÈÝÏàÁ¬½Ó-->
</body>
</html>
ÔÙдһ¸öservletÀàAJAXServletXML
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import java.io.IOException;
import java.io.PrintWriter;
//ÓÃÓÚ¶ÁÈ¡xml
public class AJAXServletXML extends HttpServlet{
   @Override
    protected void doGet(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws ServletException, IOException {
        try{
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