Spring data JPA根据id获取名称
public class Student {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "name")
private String name;
}
如何获得只有这个名字的SQLSELECT name from Student where id = 2;
我是Spring data JPA的新手，提前谢谢
根据https://docs.spring.io/spring-data/jpa/docs/current/api/org/springframework/data/jpa/repository/JpaRepository.html，您只需调用getReferenceByID(Long Id)即可
public interface StudentRepository extends JpaRepository<Student, Long> {
}
public YourClass(StudentRepo studentRepo) {
Student student = studentRepo.getReferenceById(42L);
}