json使用案例以及几种解析json方式

来源：互联网发布：广元历史湿度数据查询编辑：程序博客网时间：2024/06/02 17:10

http://www.cnblogs.com/hl0071/articles/1360321.html

myPagination分页插件使用案例：后台使用fastjson-1.1.26.jar解析json

前台代码result.jsp:

<%@page import="com.zjlolife.util.PageModel"%><%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><%  PageModel pageModel = (PageModel)request.getAttribute("pageModel");   %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head>     <base href="<%=basePath%>"><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>myPaginationV4.0 Jquery Plug-in --- LinApex</title><link href="css/page.css" rel="stylesheet" type="text/css" /><script src="js/jquery-1.6.js" type="text/javascript">    </script><script src="js/jquery.myPagination.js" type="text/javascript">          </script><script> $(document).ready(function() {    $("#demo").myPagination({      currPage: 1,      pageCount: <%=pageModel.getPageCount()%>,      pageSize: 5,      ajax: {              on: true,                        //开启状态              callback: 'ajaxCallBack',    //回调函数，注，此 ajaxCallBack 函数，必须定义在 $(function() {}); 外面              url: "<%=basePath%>servlet/Servlet",            //访问服务器地址              dataType: 'json',                //返回类型              param:{on:true,page:1,pageSize:5}//参数列表，其中  on 必须开启，page 参数必须存在，其他的都是自定义参数，如果是多条件查询，可以序列化表单，然后增加 page 参数            }    });  });//自定义 回调函数function ajaxCallBack(data) {        // alert(data.result);   //显示服务器返回信息                  var insetViewData = "";//视图数据                  var result = eval("("+data.result+")");                var students = result.students;         $.each(students, function(i) {        insetViewData += createTR(i,students[i]);         });                  $("table > tbody").html(insetViewData);}function createTR(key,value){var tr = "<tr>";tr += "<td>"+value.id+"</td>";tr += "<td>"+value.name+"</td>";tr += "<td>"+value.age+"</td>";tr += "<td>"+value.teacherName+"</td>";tr += "<td>"+value.yuanxi+"</td>";tr += "</tr>";return tr;}</script></head>    <body>       <div style="margin:0px auto 0px;width: 300;height:200;color: black;">     <table width="300" border="1">  <thead>      <tr>         <td>学号</td>         <td>学生姓名</td>         <td>年龄</td>         <td>老师</td>         <td>院系</td>      </tr>  </thead>  <tbody>  </table>  </div>     <div id="demo"></div>  </body></html>

后台代码：（封装的PageModel转换成json对象，输出带前台，还使用了ajax技术）

package com.zjlolife.web;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONObject;import com.zjlolife.util.PageModel;import com.zjlolife.util.PageService;public class Servlet extends HttpServlet {/** * Constructor of the object. */public Servlet() {super();}/** * Destruction of the servlet. <br> */public void destroy() {super.destroy(); // Just puts "destroy" string in log// Put your code here}/** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. *  * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {request.setCharacterEncoding("utf-8");System.out.println(request.getParameter("page")); int pageNo = 1; if(request.getParameter("page")!=null) { pageNo = Integer.valueOf(request.getParameter("page")); } int pageSize  = 5; if(request.getParameter("pageSize")!=null) { pageSize = Integer.valueOf(request.getParameter("pageSize")); }                 JSONObject jsonObject = new JSONObject();    PageModel pageModel = new PageService().findAllStudents(pageNo, pageSize);    String json = JSON.toJSONString(pageModel);    System.out.println(json);    jsonObject.put("result", json);    System.out.println(jsonObject);    response.setCharacterEncoding("utf-8");//使用ajax技术的时候，此处最好加上response编码，否则会出现乱码    response.getWriter().print(jsonObject);    }/** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. *  * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {    this.doGet(request, response);}/** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */public void init() throws ServletException {// Put your code here}}