mybatisplus-ActiveRecord 模式

ActiveRecord 模式
直接调用Model对象来进行增删改查。

实体类只需继承 Model 类即可进行强大的 CRUD 操作
需要项目中已注入对应实体的BaseMapper

实体类User

点击查看代码

import com.baomidou.mybatisplus.extension.activerecord.Model;
import lombok.Data;

@Data
public class User extends Model<User> {
    private Long id;
    private String name;
    private Integer age;
    private String email;
}

Mapper接口

点击查看代码

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.mybatisplusdemo.sample.model.User;

import java.util.List;

public interface UserMapper extends BaseMapper<User> {
    List<User> findAll();
}

测试

点击查看代码

@Autowired
    private UserMapper userMapper;

    @Test
    void contextLoads() {
        System.out.println(("----- selectAll method test ------"));
        //List<User> userList = userMapper.findAll();
        User user = new User();
        List<User> userList = user.selectAll();
        Assert.assertEquals(5, userList.size());
        userList.forEach(System.out::println);
    }

测试结果
----- selectAll method test ------
User(id=1, name=Jone, age=18, email=test1@baomidou.com)
User(id=2, name=Jack, age=20, email=test2@baomidou.com)
User(id=3, name=Tom, age=28, email=test3@baomidou.com)
User(id=4, name=Sandy, age=21, email=test4@baomidou.com)
User(id=5, name=Billie, age=24, email=test5@baomidou.com)

但是不能使用findAll方法