jquery 注册验证用户名

来源:互联网 发布:淘宝图片抓取工具免费 编辑:程序博客网 时间:2024/05/03 02:23

 servlet 代码:

 

 public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  
  response.setContentType("text/html");
  response.setContentType("text/xml");
  response.setContentType( "text/xml;charset=utf-8 ");    
     request.setCharacterEncoding( "utf-8");     
  PrintWriter out = response.getWriter();
  
  out
  .println("<!DOCTYPE HTML PUBLIC /"-//W3C//DTD HTML 4.01 Transitional//EN/">");
   out.println("<HTML>");
   out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
   out.println("<BODY>"
     );
   String name = request.getParameter("name");
      if(name.equals("jim")){
      out.println(name+"welcome!!");
      }else{
       out.println("error!!");
      }
   out.println("</BODY>");
   out.println("</HTML>");
   out.flush();
   out.close();
 }


a.jsp

 

<script type="text/javascript" src="jquery-1.3.1.min.js"></script>
  <script type="text/javascript">
     $(document).ready(function(){
      $("#name").blur(function(){
       
           $.ajax({
          type:"post",
          url:"Search",
          data:"name="+$("#name").val(),
          dataType:"text",
          success:function(data){
           $("#msg").html(data);
          }
        });
       
        });
      });
  </script>
   <body>
   <input name="username" type="text" id="name">
     <div id="msg"></div>
   </body>
 </html>