mybatis插入数据时如何获取到该条数据的自增id

实体类

@Data
@NoArgsConstructor
public class Phone {
	private int id;
	private String brand; // 品牌
	private String model; // 型号
	private int salary; // 价格
}

mapper接口和sql

useGeneratedKeys=“true” ， keyProperty位实体类字段，用来存储自增id

<insert id="insertPhone" parameterType="phone" useGeneratedKeys="true" keyProperty="id">
	insert into phone(brand, model, salary) values(#{brand}, #{model}, #{salary})
</insert>

测试

通过以上参数设置后自增id就会赋值给实体类的属性id，通过get就可直接拿到

@SpringBootTest
public class PhoneTest {
	@Autowired
	private UserInfoMapper userInfoMapper;
	@Test
	public void test() {
		Phone phone = new Phone();
		phone.setBrand("努比亚");
		int num = userInfoMapper.insertPhone(phone);
		System.out.println("id = " + phone.getId());
		Assertions.assertEquals(1, num);
	}
}