@Entity
@Table(name="t_group")
public class Group {
private int id;
private String name;
private Set<User> users = new HashSet<User>();
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
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;
}
@OneToMany
public Set<User> getUsers() {
return users;
}
public void setUsers(Set<User> users) {
this.users = users;
}
}
@Entity
@Table(name="t_user")
public class User {
private int id;
private String name;
private Group group;
@ManyToOne(cascade={CascadeType.ALL})
public Group getGroup() {
return group;
}
public void setGroup(Group group) {
this.group = group;
}
@Id
@GeneratedValue
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;
}
}
//测试方法
@Test
public void testSaveUser() {
User u = new User();
u.setName("u1");
Group g = new Group();
g.setName("g1");
u.setGroup(g);
Session session = sf.openSession();
session.beginTransaction();
session.save(u);;
session.getTransaction().commit();
session.close();
}
查看生成的两张表的id
采用@GeneratedValue自动生成Id策略为什么两张表生成的id是顺序接连下来的，而不是从1各自递增？
Hibernate版本：hibernate-release-5.2.17.Final
