依赖：
1 <!-- spring boot的分页插件PageHelper --> 2 <dependency> 3 <groupId>com.github.pagehelper</groupId> 4 <artifactId>pagehelper-spring-boot-starter</artifactId> 5 <version>1.2.3</version> 6 </dependency>
重写 PageHelper类，后面直接调用即可
1 package com.test.controller; 2 3 import com.github.pagehelper.Page; 4 import com.github.pagehelper.PageInfo; 5 import com.test.entity.Person; 6 7 import java.util.ArrayList; 8 import java.util.List; 9 10 /** 11 * @author liuwenlong 12 * @create 2021-11-07 13:15:41 13 */ 14 @SuppressWarnings("all") 15 public class PageHelper { 16 public static PageInfo pageHelper(List list, Integer pageNum, Integer pageSize){ 17 Page page = new Page(pageNum, pageSize); 18 int total = list.size(); 19 page.setTotal(total); 20 int startIndex = (pageNum - 1) * pageSize; 21 int endIndex = Math.min(startIndex + pageSize,total); 22 if(startIndex>endIndex){ 23 page.addAll(new ArrayList()); 24 PageInfo pageInfo = new PageInfo<>(page); 25 return pageInfo; 26 }else{ 27 page.addAll(list.subList(startIndex,endIndex)); 28 PageInfo pageInfo = new PageInfo<>(page); 29 return pageInfo; 30 } 31 } 32 }
调用
1 package com.test.controller; 2 3 import com.github.pagehelper.PageInfo; 4 import com.test.entity.Person; 5 import org.springframework.stereotype.Controller; 6 import org.springframework.ui.Model; 7 import org.springframework.ui.ModelMap; 8 import org.springframework.web.bind.annotation.RequestMapping; 9 import org.springframework.web.bind.annotation.RequestParam; 10 import org.springframework.web.bind.annotation.ResponseBody; 11 import org.springframework.web.servlet.ModelAndView; 12 13 import javax.servlet.http.HttpServletRequest; 14 import java.util.ArrayList; 15 import java.util.List; 16 17 /** 18 * @author liuwenlong 19 * @create 2021-11-06 22:52:27 20 */ 21 @SuppressWarnings("all") 22 @RequestMapping(value = "testController") 23 @Controller 24 public class PersonController { 25 26 @RequestMapping(value = "test") 27 public String getAllUser(@RequestParam(value="pageNum",defaultValue="1")Integer pageNum, 28 HttpServletRequest req,Model mod) { 29 30 31 Person person1 = new Person("aaa", "44"); 32 Person person2 = new Person("bbb", "34"); 33 Person person3 = new Person("vvv", "3333"); 34 Person person4 = new Person("dfdfd", "4543"); 35 Person person5 = new Person("ere", "4567"); 36 Person person6 = new Person("sfa", "7654"); 37 Person person7 = new Person("sfe", "4567"); 38 Person person8 = new Person("ggee", "7654"); 39 Person person9 = new Person("dh3", "567"); 40 Person person10 = new Person("eteg", "6543"); 41 42 List<Person> list = new ArrayList<>(); 43 list.add(person1); 44 list.add(person2); 45 list.add(person3); 46 list.add(person4); 47 list.add(person5); 48 list.add(person6); 49 list.add(person7); 50 list.add(person8); 51 list.add(person9); 52 list.add(person10); 53 54 PageHelper pageHelper = new PageHelper(); 55 PageInfo pages = pageHelper.pageHelper(list,pageNum,3); 56 mod.addAttribute("PageInfo",pages); 57 58 return "lwl/Pagehelper/index"; 59 } 60 }
实体类
1 package com.test.entity; 2 3 import javax.persistence.Entity; 4 5 /** 6 * @author liuwenlong 7 * @create 2021-11-06 22:51:12 8 */ 9 @SuppressWarnings("all") 10 @Entity 11 public class Person { 12 private String username; 13 private String password; 14 15 public Person() { 16 } 17 18 public Person(String username, String password) { 19 this.username = username; 20 this.password = password; 21 } 22 23 public String getUsername() { 24 return username; 25 } 26 27 public void setUsername(String username) { 28 this.username = username; 29 } 30 31 public String getPassword() { 32 return password; 33 } 34 35 public void setPassword(String password) { 36 this.password = password; 37 } 38 39 @Override 40 public String toString() { 41 return "Person{" + 42 "username='" + username + '\'' + 43 ", password='" + password + '\'' + 44 '}'; 45 } 46 }
页面
1 <%-- 2 Created by IntelliJ IDEA. 3 User: honor 4 Date: 2021/11/6 5 Time: 22:58 6 To change this template use File | Settings | File Templates. 7 --%> 8 <%@ page contentType="text/html;charset=UTF-8" language="java" %> 9 <%--引用Java公司（Sun）公司写的标签--%> 10 <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 11 <html> 12 <head> 13 <title>aaa</title> 14 </head> 15 <body> 16 <table> 17 <tr> 18 <th>用户名</th> 19 <th>密码</th> 20 21 22 </tr> 23 <c:forEach items="${PageInfo.list}" var="y"> 24 <tr> 25 <td>${y.username}</td> 26 <td>${y.password}</td> 27 </tr> 28 </c:forEach> 29 30 31 <div align="center"> 32 33 <div> 34 <%--当前第${PageInfo.pageNum}页，总共${PageInfo.pages}页，总共${PageInfo.total}条记录--%> 35 36 <div align="center"> 37 <font size="2">总${PageInfo.total}条记录</font> 38 <font size="2">共 ${PageInfo.pages}页</font> 39 <font size="2">第${PageInfo.pageNum}页</font> 40 <a href="${pageContext.request.contextPath}/testController/test?pageNum=1">首页</a> 41 <c:choose> 42 <c:when test="${PageInfo.pageNum - 1 > 0}"> 43 <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pageNum - 1}">上一页</a> 44 </c:when> 45 <c:when test="${PageInfo.pageNum - 1 <= 0}"> 46 <a href="${pageContext.request.contextPath}/testController/test?pageNum=1">上一页</a> 47 </c:when> 48 </c:choose> 49 <c:choose> 50 <c:when test="${PageInfo.pages==0}"> 51 <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pageNum}">下一页</a> 52 </c:when> 53 <c:when test="${PageInfo.pageNum + 1 < PageInfo.pages}"> 54 <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pageNum + 1}">下一页</a> 55 </c:when> 56 <c:when test="${PageInfo.pageNum + 1 >= PageInfo.pages}"> 57 <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pages}">下一页</a> 58 </c:when> 59 </c:choose> 60 <c:choose> 61 <c:when test="${PageInfo.pages==0}"> 62 <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pageNum}">尾页</a> 63 </c:when> 64 <c:otherwise> 65 <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pages}">尾页</a> 66 </c:otherwise> 67 </c:choose> 68 </div> 69 </div> 70 </div> 71 72 </div> 73 74 </table> 75 </body> 76 </html>
