manytoone

@Entity @Table(name="person")
public class Person {
private Long id;
private String name;
private Date birthday;
private String note;
private byte[] image;
private Sex sex;
@Id @GeneratedValue(strategy=GenerationType.AUTO)
public Long getId() {
   return id;
}

public void setId(Long id) {
   this.id = id;
}
@Column(name="personName",length=10)
public String getName() {
   return name;
}

public void setName(String name) {
   this.name = name;
}
@Temporal(TemporalType.DATE)
public Date getBirthday() {
   return birthday;
}

public void setBirthday(Date birthday) {
   this.birthday = birthday;
}
@Lob
public String getNote() {
   return note;
}

public void setNote(String note) {
   this.note = note;
}
@Lob
public byte[] getImage() {
   return image;
}

public void setImage(byte[] image) {
   this.image = image;
}
@Enumerated(EnumType.STRING)
@Column(length=5)
public Sex getSex() {
   return sex;
}

public void setSex(Sex sex) {
   this.sex = sex;
}
}

@Entity @Table(name="group_")
public class Group {
private Long id;
private String name;
private String desc;
private Set<User> user = new HashSet<User>();

@Id @GeneratedValue
public Long getId() {
   return id;
}

public void setId(Long id) {
   this.id = id;
}
public String getName() {
   return name;
}

public void setName(String name) {
   this.name = name;
}
@Column(name="desc_")
public String getDesc() {
   return desc;
}

public void setDesc(String desc) {
   this.desc = desc;
}

@OneToMany(mappedBy="group",cascade=CascadeType.ALL)
public Set<User> getUser() {
   return user;
}

public void setUser(Set<User> user) {
   this.user = user;
}

}