Hibernate（七）：*.hbm.xml配置文件中Set三个属性

• 背景：

　　在上一篇文章中实现双向关联时，其中在Customer.java中我们使用了java.util.List<Order>来关联多的Order。其实还有另外一种实现方法：使用java.util.Set来替代java.util.List。

Customer.java(定义Order:private java.util.Set<Order> orders=new HashSet<Order>();)

 1 package com.dx.hibernate.onetomany;
 2 
 3 import java.util.HashSet;
 4 import java.util.List;
 5 import java.util.Set;
 6 
 7 public class Customer {
 8     private Integer customerId;
 9     private String customerName;
10     private Set<Order> orders = new HashSet<Order>();
11 
12     public Customer() {
13     }
14 
15     public Customer(String customerName) {
16         super();
17         this.customerName = customerName;
18     }
19 
20     public Integer getCustomerId() {
21         return customerId;
22     }
23 
24     public void setCustomerId(Integer customerId) {
25         this.customerId = customerId;
26     }
27 
28     public String getCustomerName() {
29         return customerName;
30     }
31 
32     public void setCustomerName(String customerName) {
33         this.customerName = customerName;
34     }
35 
36     public Set<Order> getOrders() {
37         return orders;
38     }
39 
40     public void setOrders(Set<Order> orders) {
41         this.orders = orders;
42     }
43 }

View Code