B2C电子商务网站：三大框架整合开发的级联删除
B2C电子商务网站：三大框架整合开发的级联删除
?????? 最近在做B2C电子商务网站，所以一直很忙，都没有什么时间写我的技术ITEYE博客，今天已经把进度提上去了，后台做的差不多了。今天我想给大家分享我的项目中的级联删除的操作。
?????? 比如：对于商品表，当删除某个商品订单的时候，应该删除该订单下所有的订单详情。
?????? 最后运行的结果是：当你点击订单的删除时，它会把所有的订单明细全部删除。这样就达到了级联删除的操作。
?????? 以下是详细代码，大家可以参考。
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cn.z_xiaofei168.domain包
package cn.z_xiaofei168.domain;import java.util.Date;import java.util.HashSet;import java.util.Set;public class Orders implements java.io.Serializable {/** * @author z_xiaofei168 */private static final long serialVersionUID = 1L;private Integer id;private Payments payments;private Employees employees;private Customers customers;private String number;private Date rdate;private Double sum;private String sendmode;private String status;private Set<Orderdetails> orderdetailses = new HashSet<Orderdetails>(0);//以下省略所有的set和get方法}?
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?? Orders.hbm.xml
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<?xml version="1.0" encoding="utf-8"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping default-lazy="false"package="cn.z_xiaofei168.domain"><class name="Orders" table="orders"><id name="id" type="java.lang.Integer"><column name="id" /><generator /></id><many-to-one fetch="select" lazy="false"name="payments"><column name="payment_id" not-null="true" /></many-to-one><many-to-one fetch="select" lazy="false"name="employees"><column name="employees_id" not-null="true" /></many-to-one><many-to-one fetch="select" lazy="false"name="customers"><column name="customers_id" not-null="true" /></many-to-one><property generated="never" lazy="false" name="number"type="java.lang.String"><column length="20" name="number" not-null="true" /></property><property generated="never" lazy="false" name="rdate" type="date"><column length="19" name="rdate" not-null="true" /></property><property generated="never" lazy="false" name="sum"type="java.lang.Double"><column name="sum" not-null="true" precision="22" scale="0" /></property><property generated="never" lazy="false" name="sendmode"type="java.lang.String"><column length="50" name="sendmode" not-null="true" /></property><property generated="never" lazy="false" name="status"type="java.lang.String"><column length="10" name="status" not-null="true" /></property><set inverse="true" lazy="false" name="orderdetailses" sort="unsorted"><key><column name="orders_id" not-null="true" /></key><one-to-many /></set></class></hibernate-mapping>
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? cn.z_xiaofei168.action包
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package cn.z_xiaofei168.action;import java.util.List;import cn.z_xiaofei168.domain.Orders;import cn.z_xiaofei168.service.OrdersServiceImpl;import com.opensymphony.xwork2.ActionSupport;public class OrdersAction extends ActionSupport {/** * @author z_xiaofei168 */private static final long serialVersionUID = 1L;/** 业务层对象 */private OrdersServiceImpl ordersServiceImpl;private Orders entity;private List<Orders> entities;//以下省略所以的set和get方法/** 级联删除的操作 */public String delete() throws Exception {ordersServiceImpl.delete(entity.getId());return "delete";}}??
?? cn.z_xiaofei168.dao包
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package cn.z_xiaofei168.dao;import java.util.List;import java.util.Set;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import cn.z_xiaofei168.domain.Orderdetails;import cn.z_xiaofei168.domain.Orders;public class OrdersDaoImpl extends HibernateDaoSupport implements OrdersDao {public void delete(Orders entity) throws Exception {/** 删除订单之前,应该把订单对应的订单明细删除 */Set<Orderdetails> orderdetails = entity.getOrderdetailses();if(orderdetails.size()==0){System.out.println("orderdetails对象为空");}else{for(Orderdetails ord: orderdetails){this.getHibernateTemplate().delete(ord);}}this.getHibernateTemplate().delete(entity);}public void delete(Integer id) throws Exception {this.delete(this.findById(id));}public Orders findById(Integer id) throws Exception {return (Orders) this.getHibernateTemplate().get(Orders.class, id);}}?
? cn.z_xiaofei168.service包
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package cn.z_xiaofei168.service;import java.util.List;import cn.z_xiaofei168.dao.OrdersDaoImpl;import cn.z_xiaofei168.domain.Orders;public class OrdersServiceImpl implements OrdersService {private OrdersDaoImpl ordersDaoImpl;//set方法注入public void setOrdersDaoImpl(OrdersDaoImpl ordersDaoImpl) {this.ordersDaoImpl = ordersDaoImpl;}public void delete(Integer id) throws Exception {ordersDaoImpl.delete(id);}}?
?????? 具体的JSP页面就不在这贴了，相信大家都会，都明白。
?????? 大家有什么可以给我留言。
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10 楼 soliucheng 2011-05-27 就这也好意轴贴出来啊，还那么多步操作，你 象三楼那样配置一下就行了，hibernate又不傻.. 11 楼 z_xiaofei168 2011-05-27 soliucheng 写道就这也好意轴贴出来啊，还那么多步操作，你 象三楼那样配置一下就行了，hibernate又不傻..