比较运算符：
?? HQL运算符?????????????????? QBC运算符????????????????????? 含义
????? =???????????????????? Restrictions.eq()????????????????? 等于
????? <>?????????????????? Restrictions.not(Exprission.eq())? 不等于
????? >???????????????????? Restrictions.gt()????????????????? 大于
????? >=?????????????????? Restrictions.ge()????????????????? 大于等于
????? <???????????????????? Restrictions.lt()????????????????? 小于
????? <=?????????????????? Restrictions.le()????????????????? 小于等于
????? is null???????????? Restrictions.isnull()????????????? 等于空值
????? is not null????? Restrictions.isNotNull()?????????? 非空值
????? like???????????????? Restrictions.like()??????????????? 字符串模式匹配
????? and??????????????? Restrictions.and()???????????????? 逻辑与
????? and??????????????? Restrictions.conjunction()???????? 逻辑与
????? or?????????????????? Restrictions.or()????????????????? 逻辑或
????? or?????????????????? Restrictions.disjunction()???????? 逻辑或
????? not????????????????? Restrictions.not()???????????????? 逻辑非
????? in(列表)????????? Restrictions.in()????????????????? 等于列表中的某一个值