关联配置

one :

<set name="precontracts" inverse="true" lazy="false" cascade="all">
            <key>
                <column name="SCHEDULE_ID" precision="8" scale="0" not-null="true" />
            </key>
            <one-to-many class="com.oa.beans.Precontract" />
        </set>

many:

        <many-to-one name="schedule" class="com.oa.beans.Schedule"  fetch="join" update="true" cascade="all">
            <column name="SCHEDULE_ID" precision="8" scale="0" not-null="true" />
        </many-to-one>