@Transactional public void updateUser(User user) { userRepository.save(user); } @Transactional(propagation = Propagation.REQUIRES_NEW) public void updateUser(User user) { userRepository.save(user); } properties spring.datasource.url=jdbc:mysql://localhost:3306/mydb spring.datasource.username=root spring.datasource.password=123456 properties spring.jpa.generate-ddl=true spring.jpa.hibernate.ddl-auto=update