if("lila".equals(name)){
builder.append("该用户名已经注册").append("</message>");
}else{
builder.append("该用户名未注册，您可以注册["+name+"]这个用户名").append("</message>");
}
}
out.println(builder.toString());
}catch (Exception e) {
e.printStackTrace();
//3.检验操作
}
}
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doGet(req, resp);
}
}
3. 前台html页面
<!DOCTYPE html>
<html>
<head>
<title>AJAX实例</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=GB2312">
<script type="text/javascript" src="js/AjaxJqueryXml.js"></script>
<script type="text/javascript" src="js/jquery.js"></script>
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head>
<body>
<font color="blue" size="2">请输入用户名：</font>
<input type="text" id="userName" /><font color="red" size="2"><span id="result" >*</span></font><br/><br/>
<input type="submit" name="提交" value="提交" onclick="verify()"/>
</body>
</html>
这里请自己添加jquery库文件。
