package com.hanqi.dao;

import java.util.ArrayList;

import java.util.List;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import org.hibernate.boot.registry.StandardServiceRegistryBuilder;

import org.hibernate.cfg.Configuration;

import org.hibernate.service.ServiceRegistry;

import com.hanqi.entity.Student;

public class StudentDAO {

    ServiceRegistry sr=null;

    Configuration cfg=null;

    SessionFactory sf=null;

    Session se=null;

    Transaction tr=null;

    public StudentDAO()

    {

        cfg=new Configuration().configure();

         sr=new StandardServiceRegistryBuilder()

                .applySettings(cfg.getProperties()).build();

    }

    //初始化

    private void init()

    {

        sf=cfg.buildSessionFactory(sr);

        se=sf.openSession();

        tr=se.beginTransaction();

    }

    //提交和释放资源

    private void destory()

    {

        tr.commit();

        se.close();

        sf.close();

    }

    //获取分页的数据集合

    public List<Student> getPageList(int page,int rows)

    {

        List<Student> rtn=new ArrayList<Student>();

        init();

        int num=(page-)*rows;

        rtn=se.createQuery("from Student").setFirstResult(num).setMaxResults(rows).list();

        destory();

        return rtn;

    }

    //获取数据条数

    public int getTotal()

    {

        int rtn=;

        init();

        List<Object>lo=se.createQuery("select count(1) from Student").list();

        if(lo!=null&&lo.size()>)

        {

            rtn=Integer.parseInt(lo.get().toString());

        }

         destory();

        return rtn;

    }

}

package com.hanqi.service;

import java.util.List;

import com.alibaba.fastjson.JSONArray;

import com.hanqi.dao.StudentDAO;

import com.hanqi.entity.Student;

public class StudentService {

    //查询分页数据

    //返回JSON

    public String getPageJSON(int page,int rows)

    {

        String rtn="{'title':0,'rows':[]}";

        int total=new StudentDAO().getTotal();

        if(total>)

        {

            List<Student>ls= new StudentDAO().getPageList(page, rows);

            String ls_json=JSONArray.toJSONString(ls);

            //利用转义字符转成JSON格式的语句

            rtn="{\"total\":"+total+",\"rows\":"+ls_json+"}";

        }

        return rtn;

    }

}

package com.hanqi.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.hanqi.service.StudentService;

/**

 * Servlet implementation class StudentServlet

 */

public class StudentServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    /**

     * @see HttpServlet#HttpServlet()

     */

    public StudentServlet() {

        super();

        // TODO Auto-generated constructor stub

    }

    /**

     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

     */

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        request.setCharacterEncoding("UTF-8");

        response.setCharacterEncoding("UTF-8");

        response.setContentType("text/html");

        String spage=request.getParameter("page");

        String srows=request.getParameter("rows");

        if(spage!=null&& srows!=null)

        {

        int page=Integer.parseInt(spage);

        int rows=Integer.parseInt(srows);

        String json =new StudentService().getPageJSON(page, rows);

        response.getWriter().print(json);

        }

        else

        {

            response.getWriter().print( "{'title':0,'rows':[]}");

        }

    }

    /**

     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

     */

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        // TODO Auto-generated method stub

        doGet(request, response);

    }

}

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title>Insert title here</title>

<!-- 、JQuery的js包 -->

<script type="text/javascript" src="jquery-easyui-1.4.4/jquery.min.js"></script>

<!--  css资源 -->

<link rel="stylesheet" type="text/css" href="jquery-easyui-1.4.4/themes/default/easyui.css">

<!-- 、图标资源 -->

<link rel="stylesheet" type="text/css" href="jquery-easyui-1.4.4/themes/icon.css">

<!-- 、easyui的js包 -->

<script type="text/javascript" src="jquery-easyui-1.4.4/jquery.easyui.min.js"></script>

<!-- 、本地语言 -->

<script type="text/javascript" src="jquery-easyui-1.4.4/locale/easyui-lang-zh_CN.js"></script>

</head>

<body>

<script type="text/javascript">

$(function(){

    //创建data_grid

    $("#st").datagrid({

        url:'StudentServlet', //数据来源

        //冻结列

        //列的定义

        columns:[[

            {field:'sno',title:'学生编号',width:},

            {field:'sname',title:'学生姓名',width:},

            {field:'ssex',title:'性别',width:,align:'right'},

            {field:'sbirthday',title:'生日',width:,align:'center',hidden:true},

            {field:'sclass',title:'班级',width:,align:'right',sortable:true}

        ]],

        fitColumns:true,//列自适应宽度，不能和冻结列同时设置为true

        striped:true,//斑马线效果

        idField:'sno',//主键列

        rownumbers:true,//显示行号

        singleSelect:false,//是否单选

        pagination:true,//显示分页栏

        pageList:[,,,],//每页行数选择列表

        pageSize:,//出事每页行数

        remoteSort:false,//是否服务器端排序，设成false，才能客户端排序

        sortName:'sclass'//设置排序列

    });

})

</script>

学生表

<br><br>

<table id="st"></table>

</body>

</html>