Hibernate MappingException在MySql中使用annotation@Inheritation时出现异常

我正在使用Hibernate framework 3.6.10.Final和MySql。我要走了

线程“main”org.hibernate.MappingException中的异常：无法将标识列键生成与以下映射一起使用：org.koushik.javabrains.dto.Vehicle

当am包括

@继承时（策略=继承类型。每个类别的表）

在车辆类别中。没有这个注释，它可以正常工作

---

Vehicle.java

是我的基类：

@Entity
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)

public class Vehicle 
{

    @Id
    @GeneratedValue
    private int vehicleId;
    private String vehicleName;
        public int getVehicleId() {
        return vehicleId;
    }

    public void setVehicleId(int vehicleId) {
        this.vehicleId = vehicleId;
    }

    public String getVehicleName() {
        return vehicleName;
    }

    public void setVehicleName(String vehicleName) {
        this.vehicleName = vehicleName;
    }

}

---

twoweeler.java

：

@Entity
public class TwoWheeler extends Vehicle {
    private String SteeringHandle;

    public String getSteeringHandle() {
        return SteeringHandle;
    }

    public void setSteeringHandle(String steeringHandle) {
        SteeringHandle = steeringHandle;
    }

}

@Entity
public class FourWheeler extends Vehicle {
    private String SteeringWheel;

    public String getSteeringWheel() {
        return SteeringWheel;
    }

    public void setSteeringWheel(String steeringHandle) {
        SteeringWheel = steeringHandle;
    }

}

---

FourWheeler.java

：

@Entity
public class TwoWheeler extends Vehicle {
    private String SteeringHandle;

    public String getSteeringHandle() {
        return SteeringHandle;
    }

    public void setSteeringHandle(String steeringHandle) {
        SteeringHandle = steeringHandle;
    }

}

@Entity
public class FourWheeler extends Vehicle {
    private String SteeringWheel;

    public String getSteeringWheel() {
        return SteeringWheel;
    }

    public void setSteeringWheel(String steeringHandle) {
        SteeringWheel = steeringHandle;
    }

}

---

我的主要班级：

public class HibernateTest {
    public static void main(String[] args)
    {

        Vehicle vehicle = new Vehicle();
        vehicle.setVehicleName("audi"+(int)(Math.random() * 100) + 1);

        TwoWheeler bike = new TwoWheeler();
        bike.setVehicleName("bike");
        bike.setSteeringHandle("Bike SteeringHandle");

        FourWheeler car = new FourWheeler();
        car.setVehicleName("car");
        car.setSteeringWheel("Car SteeringHandle");

        SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
        Session session = sessionFactory.openSession();
        session.beginTransaction();
        session.save(vehicle);
        session.save(bike);
        session.save(car);
        session.getTransaction().commit();
        session.close();

    }
}

当我运行时，我得到以下错误：

SLF4J:未能加载类“org.SLF4J.impl.StaticLoggerBinder”。 SLF4J:默认为无操作（NOP）记录器实现 SLF4J：有关更多详细信息，请参阅。 线程“main”org.hibernate.MappingException中的异常：无法将标识列键生成与以下映射一起使用：org.koushik.javabrains.dto.Vehicle 位于org.hibernate.persister.entity.UnionSubassentitypersister.（unionSubassentitypersister.java:90） 位于org.hibernate.persister.PersisterFactory.createClassPersister（PersisterFactory.java:90） 位于org.hibernate.impl.SessionFactoryImpl.（SessionFactoryImpl.java:286） 位于org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1872） 位于org.koushik.hibernate.HibernateTest.main（HibernateTest.java:26）

---

如果使用每个类的表，则必须使用此ID生成策略：@GeneratedValue（策略

---

=GenerationType.TABLE）

Vehicle.java

@Entity
@Table(name="vehicle")
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)

public class Vehicle 
{

    @Id
    @GeneratedValue(strategy=GenerationType.TABLE)
    @Column(name="vehicle_id")
    private int vehicleId;
    @Column(name="vehicle_name")
    private String vehicleName;
        public int getVehicleId() {
        return vehicleId;
    }

    public void setVehicleId(int vehicleId) {
        this.vehicleId = vehicleId;
    }

    public String getVehicleName() {
        return vehicleName;
    }

    public void setVehicleName(String vehicleName) {
        this.vehicleName = vehicleName;
    }

}

请看下面的答案