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Delete child objects/records in one-to-many relationship using Hibernate
<hibernate-mapping>
    <class name="author.vo.ProductVO" table="Product">
    <id name="ProductID" type="long">
            <column name="Product_ID" />
            <generator class="increment" />
     </id>
    <set name="packages" inverse="true" cascade="all" lazy="false">
    <key column="Product_ID" not-null="true" on-delete="cascade"/>
    <one-to-many class="author.vo.PackageVO" />
     </set>

@Autowired
private HibernateTemplate hibernateTemplate;

this.hibernateTemplate.saveOrUpdate(prod);