5.3、 测试分页插件（推荐）

package com.wzy;
import com.baomidou.mybatisplus.plugins.Page;
import com.wzy.mapper.EmployeesMapper;
import com.wzy.pojo.Employees;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.List;
public class testPage {
    //1.读取applicationContext.xml
    private ApplicationContext applicationContext =
            new ClassPathXmlApplicationContext("applicationContext.xml");
    //2.根据applicationContext.xml配置文件与反射，获取 EmployeesMapper对象
    private EmployeesMapper employeesMapper =
            applicationContext.getBean("employeesMapper",EmployeesMapper.class);
    @Test
    public void test1(){
        Page<Employees> page = new Page<Employees>(1, 3);
        List<Employees> list = employeesMapper.selectPage(page, null);
        list.forEach(employee -> System.out.println(employee));
        System.out.println("总条数: " + page.getTotal());
        System.out.println("当前页码: " + page.getCurrent());
        System.out.println("总页码: " + page.getPages());
        System.out.println("每页显示的条数: " + page.getSize());
        System.out.println("是否有上一页: " + page.hasPrevious());
        System.out.println("是否有下一页: " + page.hasNext());
        //将查询结果封装为Page对象
        Page<Employees> employeesPage = page.setRecords(list);
        //将Page对象，转为list结果集
        List<Employees> records = employeesPage.getRecords();
    }
}

输出结果：

Employees(id=1, lastName=Tom, email=tom@atguigu.com, gender=1, age=22) Employees(id=2, lastName=Jerry, email=jerry@atguigu.com, gender=0, age=25) Employees(id=3, lastName=Black, email=black@atguigu.com, gender=1, age=30) 总条数: 7 当前页码: 1 总页码: 3 每页显示的条数: 3 是否有上一页: false 是否有下一页: true