为所有的repositories添加自定义行为

    2.   extends SimpleJpaRepository<T, ID> implements MyRepository<T, ID> {
    4.   private final EntityManager entityManager;
    6.                           EntityManager entityManager) {
    7.     super(entityInformation, entityManager);
    9.     // Keep the EntityManager around to used from the newly introduced methods.
    12.   public void sharedCustomMethod(ID id) {
    13.     // implementation goes here
    15. }