@PostMapping("list")
    public Object list(@RequestBody PageParam pageParam) {
        //當(dāng)前頁(yè)碼
        int current = (int)pageParam.getPageNum();
        //每頁(yè)條數(shù)
        int size = (int)pageParam.getPageSize();
        //構(gòu)建 分頁(yè)構(gòu)造器
        IPage<User> page = new Page(current, size);
        //構(gòu)建 條件構(gòu)造器
        QueryWrapper<User> wrapper = new QueryWrapper<>();
        userMapper.selectPage(page, wrapper);
        List<User> records = page.getRecords();//當(dāng)前頁(yè)數(shù)據(jù)
        long total = page.getTotal();//總條數(shù)
        long pages = page.getPages();//總頁(yè)數(shù)
        records.forEach(System.out::println);
        System.out.println("當(dāng)前數(shù)據(jù)總共有:"+total);
        System.out.println("共"+pages+"頁(yè)");
        System.out.println("當(dāng)前頁(yè)數(shù)據(jù):"+records);
        return Result.suc(records, total);
    }

package com.example.demo12.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.demo12.entity.User;
import org.apache.ibatis.annotations.Mapper;
import java.util.List;
@Mapper
public interface UserMapper extends BaseMapper<User> {
    List<User> listAll();
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.demo12.mapper.UserMapper">
    <select id = "listAll" resultType="com.example.demo12.entity.User">
        select * from user
    </select>
    <select id = "userCount" resultType="java.lang.Integer">
        select count(1) from user
    </select>
    <select id = "listTest" resultType="com.example.demo12.entity.User">
        select * from user
    </select>
    <select id = "testUserCount" resultType="java.lang.Integer">
        select count(1) from user
    </select>
</mapper>