只查询实体类中部分属性的实现方法
查询实体类中的所有属性发出的sql语句如下：--Hibernate: select user0_.PASSWORD as col_0_0_, user0_.EMAIL as col_1_0_ from TBL_USER_BAK user0_ where user0_.ID=2
--Hibernate: select user0_.PASSWORD as col_0_0_, user0_.EMAIL as col_1_0_ from TBL_USER_BAK user0_ where user0_.ID=2
