Hibernate——ManyToOne双向关联

来源：互联网发布：java 线程优先级编辑：程序博客网时间：2024/05/22 03:13

@Entity@Table(name="t_group")public class Group {private int id;private String name;private Set<User> users = new HashSet<User>();@Id@GeneratedValuepublic 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(mappedBy="group")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;@Id@GeneratedValuepublic 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;}@ManyToOnepublic Group getGroup() {return group;}public void setGroup(Group group) {this.group = group;}}

规律：双向关联关系设mappedBy在多的一方

阅读全文

0 0