Hiberante 5.x以后的QBC
/** * Hibernate5.x以后的QBC查询-这是不是作死的节奏... */ @Test public void test222() { EntityManager em = HibernateUitls.getSessionFactory()…
java JPA 查询 between and 问题
javax.persistence.criteria.CriteriaBuilder这个类的这个方法怎么用啊，看晕了。。求助。 /** * Create a predicate for testing whether the first…
The type [null] is not the expected [EntityType] for the key class [class doom.vsan.entity.role.Role].
Caused by: java.lang.IllegalArgumentException: The type [null] is not the expected [EntityType] for the key class [class doom.vsan.entity.r…
jpa级联主键自增问题
两个实体，USER,GORUP，每个实体的主键都是@GeneratedValue(strategy = GenerationType.AUTO)，当然级联关系也设置好了，测试的时候是设置的cascade …
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