hibernate 延迟加载

if(!Hibernate.isInitialized(big)) {
Hibernate.initialize(big);
    }

===========
<set name="smallCatalogs" table="small_catalog" lazy="false">
<key>
            <column name="PID"  not-null="true" length="32"/>
            </key>
            <one-to-many class="com.bes.license.basis.po.SmallCatalog"  />
        </set>