hibernate一对多双向关联測試

1、数据库结构

           customer表：{ customerId , customerName}

           orders表：{ orderId , orderName , idCustomer}，其中idCustomer是外键，表示customer的ID。

          （本人采用的是MS SQL SERVER 2000个人版，刚开始时新建了一个order表，结果老是报错，说' order '附近有语法错误，后来才明白order是数据库的关键字。因此，千万不要与数据库关键字重名！）

2、Customer.hbm.xml

<hibernate-mapping>
    <class name="com.persistent.Customer" table="customer">
        <id name="id" column="customerId" unsaved-value="null">
            <generator class="increment"></generator>
        </id>
        <property name="name" column="customerName"></property>
        <set name="orders" cascade="all"  lazy="false">
            <key column="idCustomer"></key>
            <one-to-many class="com.persistent.Order"/>
        </set>
    </class>
</hibernate-mapping>
3、Order.hbm.xml

<hibernate-mapping>
    <class name="com.persistent.Order" table="orders">
        <id name="id" column="orderId" unsaved-value="null">
            <generator class="increment"></generator>
        </id>
        <property name="name" column="orderName"></property>
        <many-to-one name="customer"
                     column="idCustomer"
                     class="com.persistent.Customer"
                     lazy="false"
                     cascade="all">
        </many-to-one>
    </class>
</hibernate-mapping>
4、Customer.java和Order.java

public class Customer ...{
private Long id;
private String name;
private Set orders = new HashSet();
...
}

public class Order ...{
private Long id;
private String name;
private Customer customer;
...
}

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