Java Query.getFirstResult示例

示例#1

文件： AbstractBaseJpaDao.java 项目： Rockman18/funko-server

 @Override
 @Transactional(value = "transactionManager")
 public int count() {
   String entityName = getEntityName(type);
   Query query = entityManager.createQuery("SELECT count(*) FROM " + entityName + " instance");
   Long resultAsLong = (Long) query.getResultList().get(query.getFirstResult());
   return resultAsLong.intValue();
 }