1 @Entity
 2 public class Forder implements java.io.Serializable {
 3
 4     //省略无关代码……
 5
 6     private List<Sorder> sorders = new ArrayList<Sorder>();
 7
 8     @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "forder")
 9     public List<Sorder> getSorders() {
10         return this.sorders;
11     }
12
13     public void setSorders(List<Sorder> sorders) {
14         this.sorders = sorders;
15     }
16 }
17
18 @Entity
19 public class Sorder implements java.io.Serializable {
20
21     //省略无关代码……
22
23     private Forder forder;
24
25     @ManyToOne(fetch = FetchType.LAZY)
26     @JoinColumn(name = "fid")
27     public Forder getForder() {
28         return this.forder;
29     }
30
31     public void setForder(Forder forder) {
32         this.forder = forder;
33     }
34 }

 1 //这是17节中的代码，我们在中间插上一句
 2 @Service("sorderService")
 3 public class SorderServiceImpl extends BaseServiceImpl<Sorder> implements
 4         SorderService {
 5
 6     @Override
 7     public Forder addSorder(Forder forder, Product product) {
 8         boolean isHave = false; //用来标记有没有重复购物项
 9         //拿到当前的购物项
10         Sorder sorder = productToSorder(product);
11         //判断当前购物项是否重复，如果重复，则添加数量即可
12         for(Sorder old : forder.getSorders()) {
13             if(old.getProduct().getId().equals(sorder.getProduct().getId())) {
14                 //购物项有重复，添加数量即可
15                 old.setNumber(old.getNumber() + sorder.getNumber());
16                 isHave = true;
17                 break;
18             }
19         }
20         //当前购物项在购物车中不存在，新添加即可
21         if(!isHave) {
22                         //我们在这里插入一句：
23             //在向购物中添加购物项之前，先建立购物项与购物车的关联，但是此时forder.id为null，
24             //但是在入库的时候是先入库购物车，再入库购物项，那时候就有主键了
25             sorder.setForder(forder);
26             forder.getSorders().add(sorder);
27         }
28
29         return forder;
30     }
31
32     @Override
33     public Sorder productToSorder(Product product) {
34         Sorder sorder = new Sorder();
35         sorder.setName(product.getName());
36         sorder.setNumber(1);
37         sorder.setPrice(product.getPrice());
38         sorder.setProduct(product);
39         return sorder;
40     }
41 }

 1 @Controller("forderAction")
 2 @Scope("prototype")
 3 public class ForderAction extends BaseAction<Forder> {
 4
 5     @Override
 6     public Forder getModel() {
 7         model = (Forder) session.get("forder");
 8         return model;
 9     }
10
11     //实现购物车（订单）与购物项（订单项）级联入库功能
12     public String save() {
13 //        // 把session中的购物项交给当前的model对象
14 //        Forder forder = (Forder) session.get("forder");
15 //        //model.setSorders(forder.getSorders());
16 //        forder.setAddress(model.getAddress());
17 //        forder.setName(model.getName());
18 //        forder.setPhone(model.getPhone());
19 //        forder.setRemark(model.getRemark());
20 //        forder.setUser((User)session.get("user"));
21 //        forder.setStatus(new Status(1));
22 //        forder.setPost(model.getPost());
23 //        //级联入库(需要在xml或者POJO的注解中配置)，需要sorder关联forder
24 //        //在SorderServiceImpl类中追加sorder.setForder(forder);
25 //        forderService.save(forder);
26
27         model.setUser((User)session.get("user"));
28         model.setStatus(new Status(1));
29         forderService.save(model);
30
31         return "bank";
32     }
33 }

 1 @Controller("forderAction")
 2 @Scope("prototype")
 3 public class ForderAction extends BaseAction<Forder> {
 4
 5     @Override
 6     public Forder getModel() {
 7         model = (Forder) session.get("forder");
 8         return model;
 9     }
10
11     //实现购物车（订单）与购物项（订单项）级联入库功能
12     public String save() {
13 //        // 把session中的购物项交给当前的model对象
14 //        Forder forder = (Forder) session.get("forder");
15 //        //model.setSorders(forder.getSorders());
16 //        forder.setAddress(model.getAddress());
17 //        forder.setName(model.getName());
18 //        forder.setPhone(model.getPhone());
19 //        forder.setRemark(model.getRemark());
20 //        forder.setUser((User)session.get("user"));
21 //        forder.setStatus(new Status(1));
22 //        forder.setPost(model.getPost());
23 //        //级联入库(需要在xml或者POJO的注解中配置)，需要sorder关联forder
24 //        //在SorderServiceImpl类中追加sorder.setForder(forder);
25 //        forderService.save(forder);
26
27         model.setUser((User)session.get("user"));
28         model.setStatus(new Status(1));
29         forderService.save(model);
30
31         //此时购物车已经入库，那么原来session中的购物车就应该清空
32         session.put("oldForder", session.get("forder"));//先将原来的购物车信息保存下来，因为后面付款的时候还需要相关信息
33         session.put("forder", new Forder());//new一个新的空购物车（相当于清空了购物车），还可以方便用户再买~
34         return "bank";
35     }
36 }