Question

我有JPA实体扩展其他抽象类。我想使用@Data来避免编写setter和getter，但我的equals和hashcode方法存在。

我收到警告，但我想我不应该：

server\entity\User.java:20: warning: Generating equals/hashCode implementation but without a call to superclass, even though this class does not extend java.lang.Object. If this is intentional, add '@EqualsAndHashCode(callSuper=false)' to your type.
@Data
^

在我的用户类中：

@Data
@Entity
public class User extends AbstractAuditingEntity implements Serializable {

    ....

    @Override
    public boolean equals(Object o) {
       ...
    }

    @Override
    public int hashCode() {
       ...
    }
}

当我另外将@EqualsAndHashCode（callSuper = false）添加到@Data时，我得到：

server\entity\User.java:21: warning: Not generating equals and hashCode: A method with one of those names already exists. (Either both or none of these methods will be generated).
@EqualsAndHashCode(callSuper = false)

Answer 1

@Data是@ToString，@EqualsAndHashCode，@Getter，@Setter和@RequiredArgsConstructor的快捷方式。由于您只想要@Getter和@Setter，为什么不直接使用它们（这样可以避免您的异常或警告消息），

@Entity
@Getter
@Setter
public class User extends AbstractAuditingEntity implements Serializable 
    ...

}

Lombok - 在实现equals和hashcode时使用@Data发出警告

1 个答案: