随笔分类 -  JavaPersistenceWithHibernate第二版笔记

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JavaPersistenceWithHibernate第二版笔记-第七章-005排序的集合(@org.hibernate.annotations.SortComparator)
摘要：1 阅读全文
posted @ 2016-04-08 20:26 shamgod 阅读(275) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第七章-004Mapping a map(@MapKeyEnumerated 、 @MapKeyTemporal、@MapKeyColumn)
摘要：一、结构 二、代码 1. 2. 3. 阅读全文
posted @ 2016-04-08 18:16 shamgod 阅读(563) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第七章-003Mapping an identifier bag(@OrderColumn、@ElementCollection、@CollectionTable、、)
摘要：一、结构 二、代码 1. 2. 3. 不足之处，无论插入还是删除元素，Hibernate都需要update其他元素的位置 阅读全文
posted @ 2016-04-08 18:08 shamgod 阅读(1453) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第七章-002Mapping an identifier bag(@CollectionId、@ElementCollection、@CollectionTable、@Type)
摘要：一、结构 A bag is an unordered collection that allows duplicate elements, like the java.util.Collection interface. Curiously, the Java Collections framewo 阅读全文
posted @ 2016-04-08 17:58 shamgod 阅读(386) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第七章-001Mapping a set(@ElementCollection、@CollectionTable、@JoinColumn、)
摘要：一、结构 二、代码 1. 2. It doesn’t seem likely that you’d allow the user to attach the same image more than once to the same item, 阅读全文
posted @ 2016-04-08 17:39 shamgod 阅读(1897) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-009Polymorphic collections(@OneToMany(mappedBy = "user")、@ManyToOne、)
摘要：一、代码 1. 2. 3. 4. 5.测试 阅读全文
posted @ 2016-04-08 15:21 shamgod 阅读(254) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-008Polymorphic many-to-one associations(@ManyToOne、@Inheritance、)
摘要：一、结构 二、代码 1. 2. 3. 4. 5.测试 阅读全文
posted @ 2016-04-08 15:12 shamgod 阅读(202) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-007Inheritance of embeddable classes(@MappedSuperclass、@Embeddable、@AttributeOverrides、、)
摘要：一、结构 二、代码 1. 2. 3. 4. 5. 阅读全文
posted @ 2016-04-08 14:27 shamgod 阅读(570) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-006Mixing inheritance strategies(@SecondaryTable、@PrimaryKeyJoinColumn、<join fetch="select">)
摘要：一、结构 For example, you can map a class hierarchy to a single table, but, for a particular subclass, switch to a separate table with a foreign key–mappi 阅读全文
posted @ 2016-04-08 11:52 shamgod 阅读(401) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-005Table per subclass with joins(@Inheritance(strategy = InheritanceType.JOINED)、@PrimaryKeyJoinColumn、)
摘要：一、结构 The fourth option is to represent inheritance relationships as SQL foreign key associations. Every class/subclass that declares persistent proper 阅读全文
posted @ 2016-04-07 22:09 shamgod 阅读(400) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-004Table per class hierarchy(@Inheritance..SINGLE_TABLE)、@DiscriminatorColumn、@DiscriminatorValue、@DiscriminatorFormula)
摘要：一、结构 You can map an entire class hierarchy to a single table. This table includes columns for all properties of all classes in the hierarchy. The valu 阅读全文
posted @ 2016-04-07 21:40 shamgod 阅读(970) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-003Table per concrete class with unions(@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)、<union-subclass>)
摘要：一、代码 1. 2. 3. 二、相比上一个方法的优点 1.查询父类不用再通过多次select,而是通过union all,the query select bd from BillingDetails bd generates the following SQL statement: 2.Anoth 阅读全文
posted @ 2016-04-07 21:09 shamgod 阅读(283) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-002Table per concrete class with implicit polymorphism(@MappedSuperclass、@AttributeOverride)
摘要：一、结构 二、代码 1. 2. 3. 三、存在的问题 1.it doesn’t support polymorphic associations very well。You can’t have another entity mapped with a foreign key “referencin 阅读全文
posted @ 2016-04-07 20:49 shamgod 阅读(230) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-001Hibernate映射继承的方法
摘要：There are four different strategies for representing an inheritance hierarchy: Use one table per concrete class and default runtime polymorphic behav 阅读全文
posted @ 2016-04-07 20:34 shamgod 阅读(155) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第五章-Mapping value types-007UserTypes的用法(@org.hibernate.annotations.Type、@org.hibernate.annotations.TypeDefs、CompositeUserType、DynamicParameterizedType、、、)
摘要：一、结构 二、Hibernate支持的UserTypes接口  UserType —You can transform values by interacting with the plain JDBC PreparedStatement (when storing data) and Resul 阅读全文
posted @ 2016-04-07 18:25 shamgod 阅读(1327) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第五章-Mapping value types-006类型转换器( @Converter(autoApply = true) 、type="converter:qualified.ConverterName" )
摘要：一、结构 二、代码 1. 2. 3. 4. 5. 6. 7. 8. 9. 也可以转换集合，If several @Convert annotations are required on a single embedded property, to convert several attributes 阅读全文
posted @ 2016-04-07 17:38 shamgod 阅读(1574) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第五章-Mapping value types-005控制类型映射(Nationalized、@LOB、@org.hibernate.annotations.Type)
摘要：一、简介 1. 2. 3. 4. to override this default mapping. The JPA specification has a convenient shortcut annotation for this purpose, @Lob This maps the byt 阅读全文
posted @ 2016-04-07 14:15 shamgod 阅读(2196) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第五章-Mapping value types-004嵌套组件的注解AttributeOverrides
摘要：一、数据库 二、代码 1. 2. 3. You can declare @AttributeOverride s at any level, as you do for the name property of the City class, mapping it to the CITY colum 阅读全文
posted @ 2016-04-07 12:22 shamgod 阅读(250) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第五章-Mapping value types-003使用@AttributeOverrides
摘要：Each @AttributeOverride for a component property is “complete”: any JPA or Hibernate annotation on the overridden property is ignored. This means the 阅读全文
posted @ 2016-04-07 11:41 shamgod 阅读(453) 评论(0) 推荐(0)
JavaPersistenceWithHibernate第二版笔记-第五章-Mapping value types-002使用@Embeddable
摘要：一、数据库 二、代码 1. You should override the equals() and hashCode() methods of Address and compare instances by value. 2. 3. 三、 阅读全文
posted @ 2016-04-07 11:35 shamgod 阅读(199) 评论(0) 推荐(0)

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