【JPA】@Modifying 注解

工作中看到JPA中有一个@Modifying的用法，故此记录一下

JDK1.8

Springboot2

JPA

Oracle

之前一直用的是这样的写法：

String updateQuery = "UPDATE user SET name = :name WHERE id = :id";
EntityManager entityManager = entityManagerFactory.createEntityManager();
EntityTransaction transaction = entityManager.getTransaction();
transaction.begin();
Query query = entityManager.createNativeQuery(updateQuery);
query.setParameter("name", newName);
query.setParameter("id", id);
query.executeUpdate();
transaction.commit();
entityManager.close();

或者是这样的写法：

User user = new User();
user.setId(id);
user.setName(newName);
userRepository.save(user); // userRepository 通过构造器注入

使用@Modifying

@Repository
public interface UserRepository extends JpaRepository<User, Long> {

  @Modifying
  @Query("update User u set u.name = ?1 where u.id = ?2")
  void updateUserNameById(String name, Long id);
  
  @Modifying
  @Query(value = "UPDATE users SET name = :name WHERE id = :id", nativeQuery = true)
  void updateUserNativeQuery(@Param("name") String name, @Param("id") Long id);

}