配置xml文件

有兩個，在主配置文件中配置一對多的聯系：

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC"-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping> <class name="star.july.d_one2many.User" table="o_user"><id name="id" column="uid"><generator class="native"></generator></id><property name="name" column="name"></property><!-- 一對多set集合映射table：不需要配置key，外鍵cascade:save-update:保存和更新操作delete：刪除操作all：save-update+delete--><set name="address" cascade="save-update"><key column="uid"></key><one-to-many class="star.july.d_one2many.Address"/></set></class></hibernate-mapping>

另一個配置文件，存放地址的：

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC"-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping> <class name="star.july.d_one2many.Address" table="t_address"><id name="id" column="id"><generator class="native"></generator></id><property name="name" column="name"></property><property name="zipcode" column="zipcode"></property><property name="phone" column="phone"></property><property name="address" column="address"></property></class></hibernate-mapping>

創建實體類 在主類中創建關聯對象：

package star.july.d_one2many; import java.util.HashSet; import java.util.Set; public class User {private int id;private String name;//關聯對象private Set<Address> address =new HashSet<Address>();public Set<Address> getAddress() {return address;}public void setAddress(Set<Address> address) {this.address = address;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}@Overridepublic String toString() {return "User [id=" + id + ", name=" + name + ", address=" + address+ "]";}}

存放地址類

package star.july.d_one2many; public class Address {private int id;private String name;private String zipcode;private String phone;private String address;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getZipcode() {return zipcode;}public void setZipcode(String zipcode) {this.zipcode = zipcode;}public String getPhone() {return phone;}public void setPhone(String phone) {this.phone = phone;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}@Overridepublic String toString() {return "Address [id=" + id + ", name=" + name + ", zipcode=" + zipcode+ ", phone=" + phone + ", address=" + address + "]";}}

測試：

package star.july.d_one2many; import java.util.Set; import org.hibernate.Session; import org.hibernate.Transaction; import org.junit.Test; import star.july.util.HibernateUtil; //set集合 public class SetDemo {//添加@Testpublic void test1(){Session session = HibernateUtil.getSession();//獲取事務對象Transaction ts = session.getTransaction();try{ts.begin();//創建對象User u = new User();// u.setId(3);u.setName("小年");Address address = new Address();address.setName("姜妮");address.setPhone("1392388948");address.setZipcode("524088");address.setAddress("北涼龍虎山");Address address2 = new Address();address2.setName("大紅薯");address2.setPhone("1567384048");address2.setZipcode("524000");address2.setAddress("北莽");//保存收貨地址u.getAddress().add(address);u.getAddress().add(address2);session.save(u); // session.save(address);ts.commit();HibernateUtil.close(session);}catch(Exception e){e.printStackTrace();ts.rollback();}}//查詢@Testpublic void test2(){Session session = HibernateUtil.getSession();//獲取事務對象Transaction ts = session.getTransaction();try{ts.begin();User u = (User)session.get(User.class, 2);Set<Address> ads = u.getAddress();//對象遍歷輸出for(Address a : ads){System.out.println(a);}ts.commit();HibernateUtil.close(session);}catch(Exception e){e.printStackTrace();ts.rollback();}}//修改@Testpublic void test3(){Session session = HibernateUtil.getSession();//獲取事務對象Transaction ts = session.getTransaction();try{ts.begin();//先查詢會員User u = (User)session.get(User.class, 2);//再修改Address a = (Address) session.get(Address.class, 3);//移除兩者之間的關系，即把外鍵變為nullu.getAddress().remove(a);//刪除收貨地址session.delete(a);ts.commit();HibernateUtil.close(session);}catch(Exception e){e.printStackTrace();ts.rollback();}} }

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