Java Hibernate接口多态映射

我最近在学习Hibernate，基本概念对我来说很清楚，但我现在有一个设计问题。我所有的具体类都实现了接口，下面是代码： 包装组件

import javax.persistence.Entity;

public interface Person {
    public void setName(String name);
    public String getName();
    public void setId(Integer id);
    public Integer getId();
    public void setWeapon(Weapon weapon);
    public Weapon getWeapon();
}

import javax.persistence.*;

@Entity
@Table(name = "weapon_inf")
public class WeaponImpl implements Weapon {
    @Id@GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "weapon_id")
    private Integer id;
    @Column(name = "weapon_sharpness")
    private Integer sharpness;
    setters and getters omitted
}

````

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```` 包装组件

import javax.persistence.Entity;

public interface Person {
    public void setName(String name);
    public String getName();
    public void setId(Integer id);
    public Integer getId();
    public void setWeapon(Weapon weapon);
    public Weapon getWeapon();
}

import javax.persistence.*;

@Entity
@Table(name = "weapon_inf")
public class WeaponImpl implements Weapon {
    @Id@GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "weapon_id")
    private Integer id;
    @Column(name = "weapon_sharpness")
    private Integer sharpness;
    setters and getters omitted
}

当我尝试hibernate程序（保存一个人的实例）时，它抛出

org.hibernate.AnnotationException: @OneToOne or @ManyToOne on com.PersonImpl.weapon references an unknown entity: com.Weapon

---

有解决此问题的解决方案或注释吗？

您应该引用

WeaponImpl

而不是

WeaponImpl

，因为您的实体类是

WeaponImpl

这给了你机会

@OneToOne
@JoinColumn(name = "weapon_id",referencedColumnName = "weapon_id")
private WeaponImpl weapon;

---

尝试使用

WeaponImpl

而不是像这样使用

WeaponImpl

：

  @OneToOne(targetEntity = WeaponImpl.class)