hibernate批量删除写法

1.批量删除正常写法，此方式在海量数据删除时可能有效率问题

private static final String DELETE_USER_NAME=
         "DELETE FROM User x WHERE x.name in (:usernames) and x.id = userId";

@Override
   public boolean deleteUserName(List<String> users, Integer userID) {

      if (username!= null && !username.isEmpty()) {
         Number result = em.createQuery(DELETE_USER_NAME)
               .setParameter("usernames",users)
               .setParameter("id", userID)
               .executeUpdate();

         return ((result.intValue() == 1) ? true : false);
      }
               else
       return false;
   }

参考：https://forum.hibernate.org/viewtopic.php?f=1&t=1044044

测试发现，以上代码有问题，正确写法：

.setParameter("usernames",users)应改成.setParameterList("usernames",users)

hibernate-api：https://docs.jboss.org/hibernate/orm/5.0/javadocs/