今天用spring boot +springdata jpa 构建项目，想在javaBean中直接创建数据库的表，因为一个表中的主键有两个，然后一开始按照网上的写法，一直出现这个错误。然后调试了一会原来是自己太马虎，先把报的错贴出来：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.AssertionFailure: Subclass has to be binded after it's mother class: com.transportation.model.TruckAndPhoto

Caused by: org.hibernate.AssertionFailure: Subclass has to be binded after it's mother class: com.transportation.model.TruckAndPhoto

从字面意思也就是： 子类必须在母类之后绑定

然后先把错误的代码先拿出来：

Photo 类

@SuppressWarnings("serial")
@Entity
@Table(name = "Photo")
public class Photo extends TruckAndPhoto {


   @EmbeddedId
   private TruckAndPhoto photo_id;
   @Column(name="photo_address")
   private String photo_address;

@Override
   public String toString() {
       return "Photo [photo_id=" + photo_id + ", photo_address=" + photo_address + "]";
   }

}

TruckAndPhoto 类

@Embeddable
@SuppressWarnings("serial")
public class TruckAndPhoto implements Serializable{

private int photo_id;
private int truck_id;
public TruckAndPhoto() {
       super();
   }
   public TruckAndPhoto(int photo_id, int truck_id) {
       super();
       this.photo_id = photo_id;
       this.truck_id = truck_id;
   }
   public int getPhoto_id() {
       return photo_id;
   }
   public void setPhoto_id(int photo_id) {
       this.photo_id = photo_id;
   }
   public int getTruck_id() {
       return truck_id;
   }
   public void setTruck_id(int truck_id) {
       this.truck_id = truck_id;
   }
}
也就是 TruckAndPhoto类中的 photo_id和truck_id 为Photo 表的主键，也就是联合主键，然后报了错，一开始一直以为是没有重写equals和hashCode方法，最后才发现不是这个原因（原谅我是菜鸟），关键是出错在这里，上图：

这里的extends TruckAndPhoto 出了错，然后将extends TruckAndPhoto 该为implements Serializable 就对啦！

本文原创，转发请附上博主小名，谢谢~

Caused by: org.hibernate.AssertionFailure: Subclass has to be binded after it's mother class:相关推荐

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Caused by: org.hibernate.AssertionFailure: Subclass has to be binded after it's mother class:

Photo 类

TruckAndPhoto 类

Caused by: org.hibernate.AssertionFailure: Subclass has to be binded after it's mother class:相关推荐

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