（一）使用PageHelper分頁插件的基本配置
參考：MyBatis 分頁插件 PageHelper
參考 : PageHelper作者部落格文章學習
1.在 pom.xml中引入依賴Jar包
<!-- mybatis-pageHelper -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.0.0</version>
</dependency>
2.在mybatis-config.xml中配置PageInterceptor攔截器
<!--2.配置分頁插件，此插件必須配置在typeAliases後面-->
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<!--分頁合理化參數，預設文false；pageNum<=0，查詢第一頁；pageNum>總頁數，查詢最後一頁-->
<property name="reasonable" value="true"/>
</plugin>
</plugins>
3.EmployeeControlller.java服務端程式
@Controller
public class EmployeeControlller {
@Autowired
EmployeeService employeeService;
@RequestMapping("/emps")
public String getEmps(@RequestParam(value="pn",defaultValue="1")Integer pn,Model model) {
//1.使用PageHelper分頁插件,在查詢之前隻需傳入頁碼及每頁顯示的資料記錄參數即可！
PageHelper.startPage(pn, );
//2.startPage後緊跟的就是一個分頁查詢
List<Employee> emps=employeeService.getAll();
//3.使用PageInfo封裝查詢結果，隻需将PageInfo交給頁面即可
//4.PageInfo封裝分頁的詳細資訊
//5. PageInfo構造器的5表示連續顯示的頁碼數字
PageInfo<Employee> page=new PageInfo<Employee>(emps,);
model.addAttribute("pageInfo", page);
return "list";
}
}
4.使用Spring-Test測試子產品：模拟浏覽器向伺服器發送請求
package com.wang.ssm.test;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;
import com.github.pagehelper.PageInfo;
import com.wang.ssm.bean.Employee;
/*
* spring4的測試需要servlet-api 3.0以上版本
*/
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
//引入spring-bean.xml，springmvc.xml檔案
@ContextConfiguration(locations={"classpath:spring-bean.xml","classpath:springmvc.xml"})
public class SpringMVCTest {
@Autowired
WebApplicationContext context;
MockMvc mvc; //虛拟springmvc
@Before
public void initMockMvc(){
//首先初始化
mvc=MockMvcBuilders.webAppContextSetup(context).build();
}
@Test
public void page() throws Exception{
//MockMvcRequestBuilders模拟浏覽器向伺服器發送請求
MvcResult result=mvc.perform(MockMvcRequestBuilders.get("/emps").param("pn", "1")).andReturn();
//伺服器端傳回給浏覽器的資料
MockHttpServletRequest request=result.getRequest();
@SuppressWarnings("unchecked")
//擷取pageInfo封裝的資料
PageInfo<Employee> info=(PageInfo<Employee>) request.getAttribute("pageInfo");
//info調用以下資料可以擷取分頁資訊
System.out.println("目前頁碼="+info.getPageNum());
System.out.println("總頁碼="+info.getPages());
System.out.println("每頁的個數="+info.getSize());
System.out.println("總記錄數="+info.getTotal());
System.out.println("連續顯示的頁碼數字");
int[]pages=info.getNavigatepageNums();
for(int i:pages) {
System.out.print(i+",");
}
System.out.println("顯示目前頁碼所顯示的員工資料：");
List<Employee> list=info.getList();
for(Employee e:list){
System.out.println(e);
}
}
}
（二）PageHelp實作前台分頁功能
項目結構：
注：下載下傳項目源碼
1.前端實作分頁源碼（背景源碼在上面以展示）
<%@ 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 PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>員工清單</title>
<!--
web資源的路徑問題，不是以/開始的都是相對路徑，/代表站點根目錄
-->
<%
pageContext.setAttribute("path", request.getContextPath());
%>
<link rel="stylesheet"
href="${path}/static/bootstrap-3.3.7-dist/css/bootstrap.min.css">
<script type="text/javascript"
src="${path }/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
<script type="text/javascript"
src="${path }/static/js/jquery-1.12.4.min.js"></script>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-12">
<h1>SSM示範</h1>
</div>
</div>
<div class="row">
<div class="col-md-4 col-md-offset-0">
<button class="btn btn-primary">增加</button>
<button class="btn btn-warning">删除</button>
</div>
</div>
<div class="row">
<div class="col-md-12">
<table class="table table-hover" border="2">
<tr>
<th>編号</th>
<th>姓名</th>
<th>性别</th>
<th>郵箱</th>
<th>所屬部門</th>
<th>操作</th>
</tr>
<c:forEach items="${pageInfo.list }" var="emp">
<tr>
<td>${emp.empId }</td>
<td>${emp.empName }</td>
<td>${emp.gender=="M"?"男":"女" }</td>
<td>${emp.email }</td>
<td>${emp.department.deptName }</td>
<td>
<button class="btn btn-primary btn-sm">
<span class="glyphicon glyphicon-pencil" aria-hidden="true"></span>
增加
</button>
<button class="btn btn-warning btn-sm">
<span class="glyphicon glyphicon-trash" aria-hidden="true"></span>
删除
</button>
</td>
</tr>
</c:forEach>
</table>
</div>
</div>
<div class="row">
<div class="col-md-6">
目前${pageInfo.pageNum }頁，總共${pageInfo.pages }頁，總共${pageInfo.total }條記錄
</div>
<div class="col-md-6">
<nav aria-label="Page navigation">
<ul class="pagination">
<li><a href="${path }/emps?pn=1">首頁</a></li>
<c:if test="${pageInfo.hasPreviousPage }">
<li>
<a href="${path }/emps?pn=${pageInfo.pageNum-1}" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
</c:if>
<c:forEach items="${pageInfo.navigatepageNums }" var="page">
<c:if test="${page==pageInfo.pageNum }">
<li class="active"><a href="${path }/emps?pn=${page}">${page}</a></li>
</c:if>
<c:if test="${page!=pageInfo.pageNum }">
<li><a href="${path }/emps?pn=${page}">${page}</a></li>
</c:if>
</c:forEach>
<c:if test="${pageInfo.hasNextPage }">
<li>
<a href="${path }/emps?pn=${pageInfo.pageNum+1 }" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
</c:if>
<li><a href="${path }/emps?pn=${pageInfo.pages}">末頁</a></li>
</ul>
</nav>
</div>
</div>
</div>
</body>
</html>