package com.atguigu.mapper;
import com.atguigu.entity.User;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.springframework.stereotype.Repository;
@Repository
public interface UserMapper extends BaseMapper<User> {
}
//指定要變成實現類的介面所在的包,然後包下面的所有介面在編譯之後都會生成相應的實現類
package com.atguigu;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
@MapperScan("com.atguigu.mapper")
//指定要變成實現類的介面所在的包,然後包下面的所有介面在編譯之後都會生成相應的實現類
public class MpApplication {
public static void main(String[] args) {
SpringApplication.run(MpApplication.class, args);
}
}
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/mybatis_plus?serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=root
#下面的這一步是開啟紀錄檔,在紀錄檔檔案中可以看見我們的sql語句
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
spring.datasource.url=jdbc:mysql://localhost:3306/mybatis_plus?serverTimezone=GMT%2B8
package com.atguigu.entity;
import lombok.Data;
/**
* @Author Kilig Zong
* @Date 2020/10/27 20:17
* @Version 1.0
*/
@Data
public class User {
//注意這個在mybatis_plus中可以作用在資料庫中,但是型別需要是基本資料型別的包裝類;
private Long id;
private String name;
private int age;
private String email;
}
package com.atguigu;
import com.atguigu.entity.User;
import com.atguigu.mapper.UserMapper;
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.SpringRunner;
import java.util.List;
//這一步是將test環境和spring容器相融合
@RunWith(SpringRunner.class)
//提供了一個spring容器環境
@SpringBootTest
public class MpApplicationTests {
@Autowired
private UserMapper userMapper;
/***
* @author Kilig Zong
* @date 2020/10/27 21:10
* @description
* @param
* @return void
**/
//下面的這個方法是用來查詢所有的使用者
@Test
public void testFindAll(){
List<User> users = userMapper.selectList(null);
for (User user : users) {
System.out.println(user);
}
}
@Test
public void testSaveUser(){
User user = new User();
//id是我們mybatisplus幫我們生成的,不能是基本資料型別,必須是參照型別
user.setAge(18);
user.setName("吳世林");
user.setEmail("12324.@qq.com");
int i = userMapper.insert(user);
System.out.println(i);
}
}