springboot使用分页插件PageHelper

依赖：

<!-- spring boot的分页插件PageHelper -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.3</version>
        </dependency>

重写 PageHelper类，后面直接调用即可

package com.test.controller;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageInfo;
import com.test.entity.Person;

import java.util.ArrayList;
import java.util.List;

/**
 * @author liuwenlong
 * @create 2021-11-07 13:15:41
 */
@SuppressWarnings("all")
public class PageHelper {
    public  static PageInfo pageHelper(List list, Integer pageNum, Integer pageSize){
        Page page = new Page(pageNum, pageSize);
        int total = list.size();
        page.setTotal(total);
        int startIndex = (pageNum - 1) * pageSize;
        int endIndex = Math.min(startIndex + pageSize,total);
        if(startIndex>endIndex){
            page.addAll(new ArrayList());
            PageInfo pageInfo = new PageInfo<>(page);
            return pageInfo;
        }else{
            page.addAll(list.subList(startIndex,endIndex));
            PageInfo pageInfo = new PageInfo<>(page);
            return pageInfo;
        }
    }
}

调用

package com.test.controller;

import com.github.pagehelper.PageInfo;
import com.test.entity.Person;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;

/**
 * @author liuwenlong
 * @create 2021-11-06 22:52:27
 */
@SuppressWarnings("all")
@RequestMapping(value = "testController")
@Controller
public class PersonController {

    @RequestMapping(value = "test")
    public String getAllUser(@RequestParam(value="pageNum",defaultValue="1")Integer pageNum,
                             HttpServletRequest req,Model mod) {


        Person person1 = new Person("aaa", "44");
        Person person2 = new Person("bbb", "34");
        Person person3 = new Person("vvv", "3333");
        Person person4 = new Person("dfdfd", "4543");
        Person person5 = new Person("ere", "4567");
        Person person6 = new Person("sfa", "7654");
        Person person7 = new Person("sfe", "4567");
        Person person8 = new Person("ggee", "7654");
        Person person9 = new Person("dh3", "567");
        Person person10 = new Person("eteg", "6543");

        List<Person> list = new ArrayList<>();
        list.add(person1);
        list.add(person2);
        list.add(person3);
        list.add(person4);
        list.add(person5);
        list.add(person6);
        list.add(person7);
        list.add(person8);
        list.add(person9);
        list.add(person10);

        PageHelper pageHelper = new PageHelper();
        PageInfo pages = pageHelper.pageHelper(list,pageNum,3);
        mod.addAttribute("PageInfo",pages);

        return "lwl/Pagehelper/index";
    }
}

实体类

package com.test.entity;

import javax.persistence.Entity;

/**
 * @author liuwenlong
 * @create 2021-11-06 22:51:12
 */
@SuppressWarnings("all")
@Entity
public class Person {
    private String username;
    private String password;

    public Person() {
    }

    public Person(String username, String password) {
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "Person{" +
                "username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

页面

<%--
  Created by IntelliJ IDEA.
  User: honor
  Date: 2021/11/6
  Time: 22:58
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%--引用Java公司（Sun）公司写的标签--%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>aaa</title>
</head>
<body>
<table>
    <tr>
        <th>用户名</th>
        <th>密码</th>
       
       
    </tr>
    <c:forEach items="${PageInfo.list}" var="y">
        <tr>
            <td>${y.username}</td>
            <td>${y.password}</td>
        </tr>
    </c:forEach>


    <div align="center">

        <div>
       <%--当前第${PageInfo.pageNum}页，总共${PageInfo.pages}页，总共${PageInfo.total}条记录--%>

            <div align="center">
                <font size="2">总${PageInfo.total}条记录</font>
                <font size="2">共 ${PageInfo.pages}页</font>
                <font size="2">第${PageInfo.pageNum}页</font>
                <a href="${pageContext.request.contextPath}/testController/test?pageNum=1">首页</a>
                <c:choose>
                    <c:when test="${PageInfo.pageNum - 1 > 0}">
                        <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pageNum - 1}">上一页</a>
                    </c:when>
                    <c:when test="${PageInfo.pageNum - 1 <= 0}">
                        <a href="${pageContext.request.contextPath}/testController/test?pageNum=1">上一页</a>
                    </c:when>
                </c:choose>
                <c:choose>
                    <c:when test="${PageInfo.pages==0}">
                        <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pageNum}">下一页</a>
                    </c:when>
                    <c:when test="${PageInfo.pageNum + 1 < PageInfo.pages}">
                        <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pageNum + 1}">下一页</a>
                    </c:when>
                    <c:when test="${PageInfo.pageNum + 1 >= PageInfo.pages}">
                        <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pages}">下一页</a>
                    </c:when>
                </c:choose>
                <c:choose>
                    <c:when test="${PageInfo.pages==0}">
                        <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pageNum}">尾页</a>
                    </c:when>
                    <c:otherwise>
                        <a href="${pageContext.request.contextPath}/testController/test?pageNum=${PageInfo.pages}">尾页</a>
                    </c:otherwise>
                </c:choose>
            </div>
        </div>
        </div>

    </div>

</table>
</body>
</html>