MyBatisPlus_AR篇_入门试炼_06

文章目录

1. 实体类

原则：继承Model

package com.gblfy.springboot.mybatisplus.entity;

import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableName;
import com.baomidou.mybatisplus.extension.activerecord.Model;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.time.LocalDateTime;

@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
@TableName("user")
public class User  extends Model<User> {

    private Long id;
    private String name;
    private Integer age;
    private String email;

    //数据库没有此字段 只为了封装演示
    @TableField(exist = false)
    private String remark;
}

2. 实战

.gblfy.springboot.mybatisplus.mapper;

import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.conditions.update.LambdaUpdateChainWrapper;
import com.gblfy.springboot.mybatisplus.entity.User;
import lombok.extern.slf4j.Slf4j;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest
@Slf4j
public class UserARTest {

    @Test
    public void insertAR(){
        User user = new User();
        user.setName("刘华");
        user.setAge(20);
        user.setEmail("[e-mail]");
        boolean insert = user.insert();
        System.out.println(insert);
    }

    @Test
    public void selectByIdAR(){
        User user = new User();
        User user1 = user.selectById(111L);
        System.out.println(user == user1);
        System.out.println(user1);
    }

    @Test
    public void selectByIdAR2(){
        User user = new User();
        user.setId(11L);
        User user1 = user.selectById();
        System.out.println(user == user1);
        System.out.println(user1);
    }

    @Test
    public void updateByIdAR(){
        User user = new User();
        user.setId(11L);
        user.setName("你的纳斯达克");
        boolean user1 = user.updateById();
        System.out.println(user1);
    }

    @Test
    public void delByIdAR(){
        User user = new User();
        user.setId(11L);
        boolean user1 = user.deleteById();
        System.out.println(user1);
    }
}