1.PageHelper介绍
PageHelper是国内非常优秀的一款开源的mybatis分页插件，它支持基本主流与常用的数据库，例如mysql、oracle、mariaDB、DB2、SQLite、Hsqldb等。
github 的项目地址：https://github.com/pagehelper/Mybatis-PageHelper
码云地址：https://gitee.com/free/Mybatis_PageHelper
2.PageHelper使用
(1)集成
maven工程只要在 pom.xml 中添加如下依赖：
<dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.1.2</version> </dependency>
注意：version可以根据需要进行替换。
(2)在spring配置文件中进行配置(前提：Mybatis框架已经交由spring进行管理)
修改applicationContext.xml文件内容。
<!-- 把交给IOC管理 SqlSessionFactory --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 传入PageHelper的插件 --> <property name="plugins"> <array> <!-- 传入插件的对象 --> <bean class="com.github.pagehelper.PageInterceptor"> <property name="properties"> <props> <prop key="helperDialect">oracle</prop> <prop key="reasonable">true</prop> </props> </property> </bean> </array> </property> </bean>
(3)在真正执行sql前，使用PageHelper来完成分页。
范例：
package lucky.service.impl; import com.github.pagehelper.PageHelper; import lucky.dao.IOrdersDao; import lucky.domain.Orders; import lucky.service.IOrderService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import java.util.List; @Service @Transactional public class OrderServiceImpl implements IOrderService { @Autowired private IOrdersDao iOrdersDao; @Override public List<Orders> queryAll() throws Exception { //参数pageNum为页面值，参数pagesize代表每页显示条数 // 注意：该行代码必须紧邻执行sql语句前 PageHelper.startPage(1,5); return iOrdersDao.queryAll(); } }
修改控制器类代码：
package lucky.controller; import com.github.pagehelper.PageInfo; import lucky.domain.Orders; import lucky.service.IOrderService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.servlet.ModelAndView; import java.util.List; /** * 订单控制器 * @Controller 此注解是Spring的ioc，用于创建对象，用于把当前类对象存入spring容器中 * @RequestMapping url请求的一级目录 * @Autowired 用于注入IProductService的对象 */ @Controller @RequestMapping(path = "/orders") public class OrdersController { @Autowired private IOrderService iOrderService; //未添加分页功能 /*@RequestMapping(path = "/queryAll") public ModelAndView queryAll() throws Exception{ ModelAndView mv=new ModelAndView(); List<Orders> orders = iOrderService.queryAll(); mv.addObject("ordersList",orders); mv.setViewName("orders-list"); return mv; }*/ //添加分页功能 @RequestMapping(path = "/queryAll") public ModelAndView queryAll(@RequestParam(name="page",required = true,defaultValue = "1") int page,@RequestParam(name = "size",required = true,defaultValue = "3") int size) throws Exception{ ModelAndView mv=new ModelAndView(); List<Orders> orders = iOrderService.queryAll(page,size); //PageInfo就是一个分页bean PageInfo pageInfo=new PageInfo(orders); mv.addObject("pageInfo",pageInfo); mv.setViewName("orders-page-list"); return mv; } }
(4)jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <!DOCTYPE html> <html> <head> <!-- 页面meta --> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>数据 - AdminLTE2定制版</title> <meta name="description" content="AdminLTE2定制版"> <meta name="keywords" content="AdminLTE2定制版"> <!-- Tell the browser to be responsive to screen width --> <meta content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no" name="viewport"> <!-- Bootstrap 3.3.6 --> <!-- Font Awesome --> <!-- Ionicons --> <!-- iCheck --> <!-- Morris chart --> <!-- jvectormap --> <!-- Date Picker --> <!-- Daterange picker --> <!-- Bootstrap time Picker --> <!--<link rel="stylesheet" href="${pageContext.request.contextPath}/${pageContext.request.contextPath}/${pageContext.request.contextPath}/plugins/timepicker/bootstrap-timepicker.min.css">--> <!-- bootstrap wysihtml5 - text editor --> <!--数据表格--> <!-- 表格树 --> <!-- select2 --> <!-- Bootstrap Color Picker --> <!-- bootstrap wysihtml5 - text editor --> <!--bootstrap-markdown--> <!-- Theme style --> <!-- AdminLTE Skins. Choose a skin from the css/skins folder instead of downloading all of them to reduce the load. --> <!-- Ion Slider --> <!-- ion slider Nice --> <!-- bootstrap slider --> <!-- bootstrap-datetimepicker --> <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries --> <!-- WARNING: Respond.js doesn't work if you view the page via file:// --> <!--[if lt IE 9]> <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script> <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script> <![endif]--> <!-- jQuery 2.2.3 --> <!-- jQuery UI 1.11.4 --> <!-- Resolve conflict in jQuery UI tooltip with Bootstrap tooltip --> <!-- Bootstrap 3.3.6 --> <!-- Morris.js charts --> <!-- Sparkline --> <!-- jvectormap --> <!-- jQuery Knob Chart --> <!-- daterangepicker --> <!-- datepicker --> <!-- Bootstrap WYSIHTML5 --> <!-- Slimscroll --> <!-- FastClick --> <!-- iCheck --> <!-- AdminLTE App --> <!-- 表格树 --> <!-- select2 --> <!-- bootstrap color picker --> <!-- bootstrap time picker --> <!--<script src="${pageContext.request.contextPath}/${pageContext.request.contextPath}/${pageContext.request.contextPath}/plugins/timepicker/bootstrap-timepicker.min.js"></script>--> <!-- Bootstrap WYSIHTML5 --> <!--bootstrap-markdown--> <!-- CK Editor --> <!-- InputMask --> <!-- DataTables --> <!-- ChartJS 1.0.1 --> <!-- FLOT CHARTS --> <!-- FLOT RESIZE PLUGIN - allows the chart to redraw when the window is resized --> <!-- FLOT PIE PLUGIN - also used to draw donut charts --> <!-- FLOT CATEGORIES PLUGIN - Used to draw bar charts --> <!-- jQuery Knob --> <!-- Sparkline --> <!-- Morris.js charts --> <!-- Ion Slider --> <!-- Bootstrap slider --> <!-- bootstrap-datetimepicker --> <!-- 页面meta /--> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/bootstrap/css/bootstrap.min.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/font-awesome/css/font-awesome.min.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/ionicons/css/ionicons.min.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/iCheck/square/blue.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/morris/morris.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/jvectormap/jquery-jvectormap-1.2.2.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/datepicker/datepicker3.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/daterangepicker/daterangepicker.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/bootstrap-wysihtml5/bootstrap3-wysihtml5.min.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/datatables/dataTables.bootstrap.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/treeTable/jquery.treetable.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/treeTable/jquery.treetable.theme.default.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/select2/select2.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/colorpicker/bootstrap-colorpicker.min.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/bootstrap-markdown/css/bootstrap-markdown.min.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/adminLTE/css/AdminLTE.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/adminLTE/css/skins/_all-skins.min.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/css/style.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/ionslider/ion.rangeSlider.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/ionslider/ion.rangeSlider.skinNice.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/bootstrap-slider/slider.css"> <link rel="stylesheet" href="${pageContext.request.contextPath}/plugins/bootstrap-datetimepicker/bootstrap-datetimepicker.css"> </head> <body class="hold-transition skin-purple sidebar-mini"> <div class="wrapper"> <!-- 页面头部 --> <jsp:include page="header.jsp"></jsp:include> <!-- 页面头部 /--> <!-- 导航侧栏 --> <jsp:include page="aside.jsp"></jsp:include> <!-- 导航侧栏 /--> <!-- 内容区域 --> <!-- @@master = admin-layout.html--> <!-- @@block = content --> <div class="content-wrapper"> <!-- 内容头部 --> <section class="content-header"> <h1> 数据管理 <small>数据列表</small> </h1> <ol class="breadcrumb"> <li><a href="#"><i class="fa fa-dashboard"></i> 首页</a></li> <li><a href="#">数据管理</a></li> <li class="active">数据列表</li> </ol> </section> <!-- 内容头部 /--> <!-- 正文区域 --> <section class="content"> <!-- .box-body --> <div class="box box-primary"> <div class="box-header with-border"> <h3 class="box-title">列表</h3> </div> <div class="box-body"> <!-- 数据表格 --> <div class="table-box"> <!--工具栏--> <div class="pull-left"> <div class="form-group form-inline"> <div class="btn-group"> <button type="button" class="btn btn-default" title="新建" onclick="location.href='${pageContext.request.contextPath}/pages/product-add.jsp'"> <i class="fa fa-file-o"></i> 新建 </button> <button type="button" class="btn btn-default" title="删除"> <i class="fa fa-trash-o"></i> 删除 </button> <button type="button" class="btn btn-default" title="开启"> <i class="fa fa-check"></i> 开启 </button> <button type="button" class="btn btn-default" title="屏蔽"> <i class="fa fa-ban"></i> 屏蔽 </button> <button type="button" class="btn btn-default" title="刷新"> <i class="fa fa-refresh"></i> 刷新 </button> </div> </div> </div> <div class="box-tools pull-right"> <div class="has-feedback"> <input type="text" class="form-control input-sm" placeholder="搜索"> <span class="glyphicon glyphicon-search form-control-feedback"></span> </div> </div> <!--工具栏/--> <!--数据列表--> <table id="dataList" class="table table-bordered table-striped table-hover dataTable"> <thead> <tr> <th class="" style="padding-right: 0px;"><input id="selall" type="checkbox" class="icheckbox_square-blue"> </th> <th class="sorting_asc">ID</th> <th class="sorting_desc">订单编号</th> <th class="sorting_asc sorting_asc_disabled">产品名称</th> <th class="sorting_desc sorting_desc_disabled">金额</th> <th class="sorting">下单时间</th> <th class="text-center sorting">订单状态</th> <th class="text-center">操作</th> </tr> </thead> <tbody> <c:forEach items="${pageInfo.list}" var="orders"> <tr> <td><input name="ids" type="checkbox"></td> <td>${orders.id }</td> <td>${orders.orderNum }</td> <td>${orders.product.productName }</td> <td>${orders.product.productPrice }</td> <td>${orders.orderTimeStr }</td> <td class="text-center">${orders.orderStatusStr }</td> <td class="text-center"> <button type="button" class="btn bg-olive btn-xs">订单</button> <button type="button" class="btn bg-olive btn-xs" onclick="location.href='${pageContext.request.contextPath}/orders/findById.do?id=${orders.id}'">详情</button> <button type="button" class="btn bg-olive btn-xs">编辑</button> </td> </tr> </c:forEach> </tbody> <!-- <tfoot> <tr> <th>Rendering engine</th> <th>Browser</th> <th>Platform(s)</th> <th>Engine version</th> <th>CSS grade</th> </tr> </tfoot>--> </table> <!--数据列表/--> <!--工具栏--> <div class="pull-left"> <div class="form-group form-inline"> <div class="btn-group"> <button type="button" class="btn btn-default" title="新建"> <i class="fa fa-file-o"></i> 新建 </button> <button type="button" class="btn btn-default" title="删除"> <i class="fa fa-trash-o"></i> 删除 </button> <button type="button" class="btn btn-default" title="开启"> <i class="fa fa-check"></i> 开启 </button> <button type="button" class="btn btn-default" title="屏蔽"> <i class="fa fa-ban"></i> 屏蔽 </button> <button type="button" class="btn btn-default" title="刷新"> <i class="fa fa-refresh"></i> 刷新 </button> </div> </div> </div> <div class="box-tools pull-right"> <div class="has-feedback"> <input type="text" class="form-control input-sm" placeholder="搜索"> <span class="glyphicon glyphicon-search form-control-feedback"></span> </div> </div> <!--工具栏/--> </div> <!-- 数据表格 /--> </div> <!-- /.box-body --> <!-- .box-footer--> <div class="box-footer"> <div class="pull-left"> <div class="form-group form-inline" > 总共2 页，共14 条数据。 每页 <select class="form-control" id="changePageSize" onchange="changePageSize()"> <option>3</option> <option>5</option> <option>7</option> <option>9</option> </select> 条 </div> </div> <div class="box-tools pull-right"> <ul class="pagination"> <li> <a href="${pageContext.request.contextPath}/orders/queryAll?page=1&size=${pageInfo.pageSize}" aria-label="Previous">首页</a> </li> <li><a href="${pageContext.request.contextPath}/orders/queryAll?page=${pageInfo.pageNum-1}&size=${pageInfo.pageSize}">上一页</a></li> <c:forEach begin="1" end="${pageInfo.pages}" var="pageNum"> <li><a href="${pageContext.request.contextPath}/orders/queryAll?page=${pageNum}&size=${pageInfo.pageSize}">${pageNum}</a></li> </c:forEach> <li><a href="${pageContext.request.contextPath}/orders/queryAll?page=${pageInfo.pageNum+1}&size=${pageInfo.pageSize}">下一页</a></li> <li> <a href="${pageContext.request.contextPath}/orders/queryAll?page=${pageInfo.pages}&size=${pageInfo.pageSize}" aria-label="Next">尾页</a> </li> </ul> </div> </div> <!-- /.box-footer--> </div> </section> <!-- 正文区域 /--> </div> <!-- @@close --> <!-- 内容区域 /--> <!-- 底部导航 --> <footer class="main-footer"> <div class="pull-right hidden-xs"> <b>Version</b> 1.0.8 </div> <strong>Copyright © 2014-2017 <a href="http://www.itcast.cn">研究院研发部</a>. </strong> All rights reserved. </footer> <!-- 底部导航 /--> </div> <script src="${pageContext.request.contextPath}/plugins/jQuery/jquery-2.2.3.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/jQueryUI/jquery-ui.min.js"></script> <script> $.widget.bridge('uibutton', $.ui.button); </script> <script src="${pageContext.request.contextPath}/plugins/bootstrap/js/bootstrap.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/raphael/raphael-min.js"></script> <script src="${pageContext.request.contextPath}/plugins/morris/morris.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/sparkline/jquery.sparkline.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/jvectormap/jquery-jvectormap-1.2.2.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/jvectormap/jquery-jvectormap-world-mill-en.js"></script> <script src="${pageContext.request.contextPath}/plugins/knob/jquery.knob.js"></script> <script src="${pageContext.request.contextPath}/plugins/daterangepicker/moment.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/daterangepicker/daterangepicker.js"></script> <script src="${pageContext.request.contextPath}/plugins/daterangepicker/daterangepicker.zh-CN.js"></script> <script src="${pageContext.request.contextPath}/plugins/datepicker/bootstrap-datepicker.js"></script> <script src="${pageContext.request.contextPath}/plugins/datepicker/locales/bootstrap-datepicker.zh-CN.js"></script> <script src="${pageContext.request.contextPath}/plugins/bootstrap-wysihtml5/bootstrap3-wysihtml5.all.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/slimScroll/jquery.slimscroll.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/fastclick/fastclick.js"></script> <script src="${pageContext.request.contextPath}/plugins/iCheck/icheck.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/adminLTE/js/app.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/treeTable/jquery.treetable.js"></script> <script src="${pageContext.request.contextPath}/plugins/select2/select2.full.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/colorpicker/bootstrap-colorpicker.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/bootstrap-wysihtml5/bootstrap-wysihtml5.zh-CN.js"></script> <script src="${pageContext.request.contextPath}/plugins/bootstrap-markdown/js/bootstrap-markdown.js"></script> <script src="${pageContext.request.contextPath}/plugins/bootstrap-markdown/locale/bootstrap-markdown.zh.js"></script> <script src="${pageContext.request.contextPath}/plugins/bootstrap-markdown/js/markdown.js"></script> <script src="${pageContext.request.contextPath}/plugins/bootstrap-markdown/js/to-markdown.js"></script> <script src="${pageContext.request.contextPath}/plugins/ckeditor/ckeditor.js"></script> <script src="${pageContext.request.contextPath}/plugins/input-mask/jquery.inputmask.js"></script> <script src="${pageContext.request.contextPath}/plugins/input-mask/jquery.inputmask.date.extensions.js"></script> <script src="${pageContext.request.contextPath}/plugins/input-mask/jquery.inputmask.extensions.js"></script> <script src="${pageContext.request.contextPath}/plugins/datatables/jquery.dataTables.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/datatables/dataTables.bootstrap.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/chartjs/Chart.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/flot/jquery.flot.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/flot/jquery.flot.resize.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/flot/jquery.flot.pie.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/flot/jquery.flot.categories.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/ionslider/ion.rangeSlider.min.js"></script> <script src="${pageContext.request.contextPath}/plugins/bootstrap-slider/bootstrap-slider.js"></script> <script src="${pageContext.request.contextPath}/plugins/bootstrap-datetimepicker/bootstrap-datetimepicker.js"></script> <script src="${pageContext.request.contextPath}/plugins/bootstrap-datetimepicker/locales/bootstrap-datetimepicker.zh-CN.js"></script> <script> function changePageSize() { //获取下拉框的值 var pageSize = $("#changePageSize").val(); //向服务器发送请求，改变没页显示条数 location.href = "${pageContext.request.contextPath}/orders/queryAll?page=1&size=" + pageSize; } $(document).ready(function() { // 选择框 $(".select2").select2(); // WYSIHTML5编辑器 $(".textarea").wysihtml5({ locale : 'zh-CN' }); }); // 设置激活菜单 function setSidebarActive(tagUri) { var liObj = $("#" + tagUri); if (liObj.length > 0) { liObj.parent().parent().addClass("active"); liObj.addClass("active"); } } $(document).ready(function() { // 激活导航位置 setSidebarActive("admin-datalist"); // 列表按钮 $("#dataList td input[type='checkbox']").iCheck({ checkboxClass : 'icheckbox_square-blue', increaseArea : '20%' }); // 全选操作 $("#selall").click(function() { var clicks = $(this).is(':checked'); if (!clicks) { $("#dataList td input[type='checkbox']").iCheck("uncheck"); } else { $("#dataList td input[type='checkbox']").iCheck("check"); } $(this).data("clicks", !clicks); }); }); </script> </body> </html>
3.效果展示
