Ajax 解析 xml(jquery)

evilwicker · 发表于 2013-1-23 01:39:53

利用Ajax解析Servlet传送到前端的XML

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;

/**
* Created by IntelliJ IDEA.
* User: db2admin
* Date: 2011-1-15
* Time: 21:04:04
* To change this template use File | Settings | File Templates.
*/
public class AjaxXmlServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
      request.setCharacterEncoding("UTF-8");
      String username = request.getParameter("username");

      //返回xml格式的数据
      response.setContentType("text/xml;charset=UTF-8");
      System.out.println("AjaxXmlServlet");

      StringBuilder sb = new StringBuilder();
      PrintWriter pw = response.getWriter();

      sb.append("<messages>");
      if(username != null || username.length() > 0){
         if("uuu".equals(username)){
            sb.append("<message>");
            sb.append("<resname>对不起</resname>");
            sb.append("<res>用户名不可以可以使用</res>");
            sb.append("</message>");
         }else{
               sb.append("<message>");
               sb.append("<resname>恭喜</resname>");
               sb.append("<res>用户名可以使用</res>");
               sb.append("</message>");
         }
      }else{
         sb.append("<message>");
         sb.append("<resname>对不起</resname>");
         sb.append("<res>用户名为空</res>");
         sb.append("</message>");
      }
      sb.append("</messages>");
      pw.write(sb.toString());
}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
      this.doPost(request,response);
}
}

jsp

<%--
  Created by IntelliJ IDEA.
  User: db2admin
  Date: 2011-1-15
  Time: 19:12:10
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
      <title>使用jQuery Ajax 与 Servlet 的交互</title>
      <script type="text/javascript" src="js/jquery.js"></script>
      <script type="text/javascript">
         function verify(){
            var username = $("#username").val();
//             alert(username);

            $.ajax({
                  type:"POST",
                  url:"AjaxXmlServlet",
                  data:"username=" + username,
                  dataType:"xml",
                  error:function(xml){
                     alert("error loading xml document" + xml);
                  },
                  success:function(xml){
                     alert(xml);
                     $(xml).find("message").each(function(){
                        var resname = $(this).find("resname").text();
                        var res = $(this).find("res").text();
                        $("#result").html(resname + "--" + res);
                     });
                  }
            });

         }
         /* function callback(data){
            var jqueryObj = $(data);
            var message = jqueryObj.children();
            var message = jqueryObj.find("res");
            $("#result").html(message.text());
         }*/
      </script>
  </head>
  <body>
<input type="text" id="username" />
<input type="button" value="提交"  />
<div id="result"></div>
  </body>
</html>

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