hbernate 复合主键级联配置
?一。mapping
这里使用两张表，分别为TBL_OSU_PRODUCTFILTERDETAIL_I和TBL_OSU_PRODUCTFILTER_I，前者为复合主键，后者与前者为一对多的关系。
1.TBL_OSU_PRODUCTFILTERDETAIL_I
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
??? <class name="com.netqin.function.osuproduct.filter.model.ProductFilterDeatil" table="TBL_OSU_PRODUCTFILTERDETAIL_I" schema="OSU_WORK">
??????? <composite-id name="id" entity-name="com.netqin.function.osuproduct.filter.model.ProductFilter" lazy="false">
???????????? <column name="PFDE_PRFIID_FK"></column>
??????????? </key-many-to-one>
???????????? <key-many-to-one name="product" entity-name="com.netqin.function.osuproduct.product.model.OsuProduct" lazy="false">
???????????? <column name="PFDE_PRDUID_FK"></column>
??????????? </key-many-to-one>
???????????
??????? </composite-id>
??????? <property name="pfdeOrder" type="java.lang.Long">
??????????? <column name="PFDE_ORDER" precision="10" scale="0" not-null="true" />
??????? </property>
??? </class>
</hibernate-mapping>
说明：该表为复合主键，且每个字段与其它表为many-to-one关系，这样做方便在页面中直接使用关联对象，注意lazy="false"。
2.TBL_OSU_PRODUCTFILTER_I
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
??? <class name="com.netqin.function.osuproduct.filter.model.ProductFilter" table="TBL_OSU_PRODUCTFILTER_I" schema="OSU_WORK">
??????? <id name="prfiId" type="java.lang.Long">
??????????? <column name="PRFI_ID" precision="10" scale="0" />
??????????? <generator type="java.lang.String">
??????????? <column name="PRFI_BUSIID_FK" length="10" not-null="true" />
??????? </property>
?????????
? <set name="productFilterDetailes" cascade="all-delete-orphan" inverse="true" lazy="false">
?? <key column="PFDE_PRFIID_FK"/>
?? <one-to-many class="com.netqin.function.osuproduct.filter.model.ProductFilterDeatil"/>
? </set>
???????
??? </class>
</hibernate-mapping>
说明：这里说明即便是复合主键，也可以使用one-to-many只关联其中的一个字段。
二。操作方法
1.新增
????? ProductFilter pf = new ProductFilter();
????? pf.setPrfiBusiidFk(business[i]);?????
?????
????? //筛选明细
????? for(int j=0;j<par.length;j++){
??????? tem = par[j].split(",");//相应的子表属性，这里仅为举例
??????? ProductFilterDeatil pfd = new ProductFilterDeatil();
??????? ProductFilterDeatilId pfdfk = new ProductFilterDeatilId();//复合主键对象
??????? OsuProduct product = (OsuProduct)dao.findById(OsuProduct.class, Long.parseLong(tem[0]));
??????? pfdfk.setFilter(pf);
??????? pfdfk.setProduct(product);
???????
??????? pfd.setId(pfdfk);//封装复合主键
??????? pfd.setPfdeOrder(Long.parseLong(tem[2]));
??????? pf.getProductFilterDetailes().add(pfd);
????? }
??? dao.save(pf );
?????
2.修改和删除方法与many-to-one类似，不在赘述。
这里需要注意的是，复合主键是不能重复的，所以在新增或修改时需要做异常处理，或在前台做控制。
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/hanqunfeng/archive/2009/08/27/4489811.aspx
