使用JPA的@SecondaryTable来实现hibernate的混合使用“每个类分层结构一张表”和“每个子类一张表”的功能...

@Entity
@Table(name="T_BASE")
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="CATEGORY",discriminatorType=DiscriminatorType.STRING)
publicclassBaseDomain...{
}

@Entity
@DiscriminatorValue("sub1")
publicclassSubDomain1extendsBaseDomain...{
}

@Entity
@SecondaryTable(name="T_SUB2")
@DiscriminatorValue("sub2")
publicclassSubDomain2extendsBaseDomain...{
privateStringext;

@Column(table="T_SUB2",name="EXT2")
publicStringgetExt()...{
returnext;
}
publicvoidsetExt(Stringext)...{
this.ext=ext;
}
}