How to use

org.springframework.data.jpa.repository.support.SimpleJpaRepository

constructor

@PostConstruct
public void init() {
  // 通过反射取得Entity的Class.
  this.entityClass = (Class<T>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
  //获取实体类对应的JQL实体名称
  Entity annoEntity = entityClass.getAnnotation(Entity.class);
  this.entityName = annoEntity.name();
  if (StringUtils.isBlank(entityName)) {
    this.entityName = entityClass.getSimpleName();
  }
  //构造对应的JPA操作接口对象
  this.jpaRepository = new SimpleJpaRepository(entityClass, entityManager);
}