使用InheritanceType.TABLE_PER_CLASS的辅助表 是一种Java持久化技术中的继承映射策略。它是JPA(Java Persistence API)规范中定义的一种继承映射策略,用于将继承关系映射到数据库中的表结构。 在使用InheritanceType.TABLE_PER_CLASS的辅助表策略时,每个实体类都会对应一个独立的表,包括父类和子类的属性。这些表之间通过...
辅助表英文是disconnected table, 直译是断开的不连接的表，你也可以叫它参数表，独立表等等。但无论什...
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)//继承策略是每个类层次结构映射一张表 @TableGenerator( name="t_gen",//(requested)A unique generator name that can be referenced by one or more classes to be the generator for id values. table="t_gen_table",//Name of table that stores ...
@Entity@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)//继承策略是每个类层次结构映射一张表@TableGenerator( name="t_gen",//(requested)A unique generator name that can be referenced by one or more classes to be the generator for id values. table="t_gen_table",//Name of table that st...
InheritanceType.SINGLE_TABLE InheritanceType.JOINED第二个 InheritanceType.TABLE_PERCLASS 每一个子类 这种策略无需使用辨别者,只要继承树的根实体类上面有这个属性就ok啦 搞定 @Entity // 指定使用连接子类的映射策略 @Inheritance(strategy=InheritanceType.JOINED) ...
A strategy in which fields that are specific to a subclass are mapped to a separate table than the fields that are common to the parent class, and a join is performed to instantiate the subclass. SINGLE_TABLE A single table per class hierarchy. ...
A single table per class hierarchy TABLE_PER_CLASS A table per concrete entity class Method Summary staticInheritanceTypevalueOf(Stringname) Returns the enum constant of this type with the specified name. staticInheritanceType[]values() Returns an array containing the constants of this enum type, in...
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS) public class Person { ... } @Entity public class Employee extends Person { ... } JOINED:联接继承映射。父类和子类各自的表,并且有外键相连。 @Entity @Inheritance(strategy = InheritanceType.JOINED) ...
hibernate从查询中跳过父级。解决方案：hibernate table\ per\ u class with@mappedsuperclass不会创建...
session.getTransaction().commit();/**CREATE TABLE `student` ( `score` int(11) NOT NULL, `id` int(11) NOT NULL, PRIMARY KEY (`id`), KEY `FK8FFE823B415D44C3` (`id`), CONSTRAINT `FK8FFE823B415D44C3` FOREIGN KEY (`id`) REFERENCES `person` (`id`) ...