Jquery ajax 訪問Servlet 處理 Json 資料__Jquery

來源:互聯網
上載者:User

原文:http://blog.csdn.net/www314599782/article/details/7648724


前台jsp頁面:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ path + "/";%><!DOCTYPE HTML><html><head><base href="<%=basePath%>"><title>My JSP 'jqueryajax.jsp' starting page</title><script type="text/javascript" src="js/jquery-1.7.2.min.js"></script><script type="text/javascript">function  kk(){//得到ajax擷取到的資料,返回一個object var htmlobj=$.ajax({url:"servlet/JsonServlet",async:false}); //將 ajax object 轉換為json object,第二種轉換// htmlobj = jQuery.parseJSON(htmlobj.responseText);  htmlobj = eval(htmlobj.responseText);  //清空class 為 sj 的標籤內容 $(".sj").empty();       var html = '<table border="1"><tr><td>ID</td><td>使用者名稱</td><td>密碼</td></tr>';     //迴圈擷取資料並且拼接成html     $.each(htmlobj,function(entryIndex,entry){       html += '<tr><td>'+entry['id']+'</td><td>'     +entry['username']+'</td><td>'     +entry['password']+'</td></tr>';     });          html += '</table>';     //附加內容到class 為 sj的標籤                        $(".sj").append(html);  }</script></head><body><div>Jquery 動態擷取資料 ,示範..</div><div class="sj"></div><input type="button" onclick="kk()" value="點擊" /></body></html>


後台一個Servlet 負責從mysql中擷取資料並且將其處理成JSONArray


package com.action;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import net.sf.json.JSONArray;public class JsonServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException { Toto toto = new Toto();toto.selectAllUsers();JSONArray json = JSONArray.fromObject(toto.getUsers()); response.setCharacterEncoding("utf-8");PrintWriter pw = response.getWriter();pw.print(json);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);}}


運行後的效果:

附加 :對於jquery非同步擷取資料還可以寫成這樣,如下:(推薦用這種寫法,個人覺得比較標準)

 $.getJSON("servlet/JsonServlet",function(htmlobj){ $(".sj").empty();       var html = '<table>';          $.each(htmlobj,function(entryIndex,entry){       html += '<tr><td>'+entry['id']+'</td></tr>';     });          html += '</table>';                        $(".sj").append(html);   });}


$.ajax({url:'servlet/JsonServlet',type:'post',success:function(msg){var htmlobj = jQuery.parseJSON(msg);var html = '<table>';$.each(htmlobj,function(entryIndex,entry){       html += '<tr><td>'+entry['id']+'</td></tr>';    });html += '</table>';                        $(".sj").html(html);  }});



相關文章

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.