一对多 customer -->Order
<set name="set" inverse="true" cascade="all-delete-orphan" >
<key column="customer_id"/>
<one-to-many class="com.db.tarena.crm.order.entity.Order"/>
</set><many-to-one name="customer" column="customer_id"
cascade="save-update" class="com.db.tarena.crm.customer.entity.Customer"/>多对多 Order-->ProductOrder
<set name="product" table="crm_order_product" cascade="save-update" inverse="true" lazy="false" >
<key column="order_id" />
<many-to-many class="com.db.tarena.crm.product.entity.Product" column="product_id"/>
</set>
Product
<set name="order" table="crm_order_product" cascade="save-update" >
<key column="product_id" />
<many-to-many class="com.db.tarena.crm.order.entity.Order"
column="order_id" ></many-to-many>
</set>
测试类ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
OrderService os=(OrderService) ac.getBean("orderService");
ProductService ps=(ProductService) ac.getBean("productService");
CustomerService cs=(CustomerService) ac.getBean("customerService");
try {
Order order=new Order();
order.setOrder_Note("O(∩_∩");
Product product=ps.get(1);
Customer cus=cs.getCustomer(23);
order.addProduct(product); //这里报错了题目上的错帮帮忙
} catch (Exception e) {
e.printStackTrace();
}
<set name="set" inverse="true" cascade="all-delete-orphan" >
<key column="customer_id"/>
<one-to-many class="com.db.tarena.crm.order.entity.Order"/>
</set><many-to-one name="customer" column="customer_id"
cascade="save-update" class="com.db.tarena.crm.customer.entity.Customer"/>多对多 Order-->ProductOrder
<set name="product" table="crm_order_product" cascade="save-update" inverse="true" lazy="false" >
<key column="order_id" />
<many-to-many class="com.db.tarena.crm.product.entity.Product" column="product_id"/>
</set>
Product
<set name="order" table="crm_order_product" cascade="save-update" >
<key column="product_id" />
<many-to-many class="com.db.tarena.crm.order.entity.Order"
column="order_id" ></many-to-many>
</set>
测试类ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
OrderService os=(OrderService) ac.getBean("orderService");
ProductService ps=(ProductService) ac.getBean("productService");
CustomerService cs=(CustomerService) ac.getBean("customerService");
try {
Order order=new Order();
order.setOrder_Note("O(∩_∩");
Product product=ps.get(1);
Customer cus=cs.getCustomer(23);
order.addProduct(product); //这里报错了题目上的错帮帮忙
} catch (Exception e) {
e.printStackTrace();
}
解决方案 »
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