# 9.1.4\. 混合使用“每個類分層結構一張表”和“每個子類一張表” 你甚至可以采取如下方法混和使用“每個類分層結構一張表”和“每個子類一張表”這兩種策略： ``` <class name="Payment" table="PAYMENT"> <id name="id" type="long" column="PAYMENT_ID"> <generator class="native"/> </id> <discriminator column="PAYMENT_TYPE" type="string"/> <property name="amount" column="AMOUNT"/> ... <subclass name="CreditCardPayment" discriminator-value="CREDIT"> <join table="CREDIT_PAYMENT"> <property name="creditCardType" column="CCTYPE"/> ... </join> </subclass> <subclass name="CashPayment" discriminator-value="CASH"> ... </subclass> <subclass name="ChequePayment" discriminator-value="CHEQUE"> ... </subclass> </class> ``` 對上述任何一種映射策略而言，指向根類`Payment`的 關聯是使用`&lt;many-to-one&gt;`進行映射的。 ``` <many-to-one name="payment" column="PAYMENT_ID" class="Payment"/> ```