Java 使用hibernate从主键为复合主键的表中读取数据
我的项目中有这些POJO类Java 使用hibernate从主键为复合主键的表中读取数据,java,database,hibernate,Java,Database,Hibernate,我的项目中有这些POJO类 public class MerchantChainUser extends com.avanza.ni.common.dto.AbstractDTO implements java.io.Serializable { private long chainId; private CompositePK compositePK; public MerchantChainUser() { } public void setChainId(long ch
public class MerchantChainUser extends com.avanza.ni.common.dto.AbstractDTO
implements java.io.Serializable {
private long chainId;
private CompositePK compositePK;
public MerchantChainUser() {
}
public void setChainId(long chainId) {
this.chainId = chainId;
}
public long getChainId() {
return chainId;
}
public void setCompositePK(CompositePK compositePK) {
this.compositePK = compositePK;
}
public CompositePK getCompositePK() {
return compositePK;
}
}
AND
public class CompositePK implements Serializable {
private long merchantId;
private long userId;
public void setMerchantId(long merchantId) {
this.merchantId = merchantId;
}
public long getMerchantId() {
return merchantId;
}
public void setUserId(long userId) {
this.userId = userId;
}
public long getUserId() {
return userId;
}
}
MerchantUserChain
的hbm.xml文件为
<hibernate-mapping>
<class name="com.avanza.ni.portal.dto.MerchantChainUser" table="MERCHANT_CHAIN_USER">
<composite-id name="compositePK">
<key-property name="merchantId" type="long" column="MERCHANT_ID"></key-property>
<key-property name="userId" type="long" column="MERCHANT_USER_ID"></key-property>
</composite-id>
<property name="chainId" type="long">
<column name="MERCHANT_CHAIN_ID" length="38" />
</property>
</class>
现在我想要的是,我必须只使用商户\用户\ ID
从表中读取数据。我可以从表中检索整个数据,但现在我想设置一个条件,即只给我那些商户用户ID特定的行
。我不知道如何编写数据标准。您能试试:
Criteria crit = session.createCriteria(MerchantChainUser.class);
crit.add(Restrictions.eq("compositePK.merchantId", 42));
crit.add(Restrictions.eq("compositePK.userId", 43));
crit.setMaxResults(10);
List result = crit.list();
Vinit我在评论中给出的答案已被删除,因此我将其发布在这里:D
Criteria crit = session.createCriteria(MerchantChainUser.class)
.add(Restrictions.eq("compositePK.userId", userId));
或使用hql
session.createQuery("from MerchantChainUser where compositePK.userId = :userid").setParameter("userid",userid);