mybatisplus分页查询全部数据怎么实现

? MyBatis-Plus ?,???? PageHelper ?????????????

??,??????????? MyBatis-Plus ?????????? MyBatis-Plus ????:https://mybatis.plus/guide/quick-start.html#添加依赖

??,??? DAO ?????????,??????????,??:

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.demo.entity.User;

public interface UserMapper extends BaseMapper {

    IPage selectPageAll(Page page);

}

???,??? DAO ???????,?? selectPageAll ??,????? Page ??,??:

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.demo.entity.User;
import com.example.demo.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

@Repository
public class UserDaoImpl implements UserDao {

    @Autowired
    private UserMapper userMapper;

    @Override
    public IPage selectPageAll(int pageNum, int pageSize) {
        Page page = new Page<>(pageNum, pageSize);
        return userMapper.selectPageAll(page);
    }

}

??,??? Service ???? DAO ?????,??:

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.example.demo.entity.User;
import com.example.demo.dao.UserDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserDao userDao;

    @Override
    public IPage selectPageAll(int pageNum, int pageSize) {
        return userDao.selectPageAll(pageNum, pageSize);
    }

}

??,???? selectPageAll ???,??????????????