hibernate诠注 多对一 外键关联

hibernate注解 多对一 外键关联

实体类 User 类?

package cn.hjc.model; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.ManyToOne; @Entity 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;     }      } 

?Group类?

package cn.hjc.model; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Table;  @Entity @Table(name="t_group") public class Group {     private int id;     private String name;          @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;     }     } 

?
<mapping class="cn.hjc.model.User"/>?
<mapping class="cn.hjc.model.Group"/>?