hibernate映射继承关系
DOClass{ id } ClassA extends DOClass{ A1 } ClassC extends ClassA{ C1 } ClassD extends ClassA{ D1 } ClassG extends ClassD{ G1 } ClassH extends ClassD{ H1 } ClassB extends DOClass{ B1 } ClassE extends ClassB{ E1,e2,e3,e4,e5,e6 } ClassF extends ClassB{ F1,f2,f3,f4,f5,f6,f7 } TABLE_A {ID(PK)，A_TYPE(discriminator)，A1,C1,D1,G1,H1} TABLE_B {ID(PK)，B1} TABLE_E {B_ID(PK/FK)，E1,E2,E3,E4,E5,E6} TABLE_F {B_ID(PK/FK)，F1,F2,F3,F4,F5,F6,F7} ClassA.hbm.xml <hibernate-mapping> <class name=”ClassA” table=”TABLE_A” discriminator-value=”A”> <id/> <discriminator column=”A_TYPE” type=”string”/> <property name=”a1” column=”A1”/> <sub-class name=”ClassC” discriminator-value=”C”> <property name=”c1” column=”C1”/> </sub-class> <subclass name=”ClassD” discriminator-value=”D”> <property name=”d1” column=”D1”/> <subclass name=”ClassG” discriminator-value=”G”> <property name=”g1” column=”G1”/> </subclass> <subclass name=”ClassH” discriminator-value=”H”> <property name=”h1” column=”H1”/> </subclasss> </subclass> </class> </hibernate-mapping> ClassB.hbm.xml <hibernate-mapping> <class name=”ClassB” table=”TABLE_B”> <id/> <property name=”b1” column=”B1”/> <joined-subclass name=”ClassE” table=”TABLE_E”> <key column=”B_ID”/> <property name=”e1” column=”E1”/> <property name=”e2” column=”E2”/> <property name=”e3” column=”E3”/> <property name=”e4” column=”E4”/> <property name=”e5” column=”E5”/> <property name=”e6” column=”E6”/> </joined-subclass> <joined-subclass name=”ClassF” table=”TABLE_F”> <key column=”B_ID”/> <property name=”f1” column=”F1”/> <property name=”f2” column=”F2”/> <property name=”f3” column=”F3”/> <property name=”f4” column=”F4”/> <property name=”f5” column=”F5”/> <property name=”f6” column=”F6”/> <property name=”f7” column=”F7”/> </joined-subclass> </class> </hibernate-mapping> ?