Lombok 构建器警告 - 初始化表达式

Question

我有这个POJO：

@Entity
@Table(name = "users",
        uniqueConstraints = {
                @UniqueConstraint(columnNames = "username"),
                @UniqueConstraint(columnNames = "email")
        })
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotBlank
    @Size(max = 50)
    private String username;

}

但是我有这个警告，但我不知道如何解决它

 @Builder will ignore the initializing expression entirely. If you want the initializing expression to serve as default, add @Builder.Default. If it is not supposed to be settable during building, make the field final.

Answer 1

lombok.Data

对于

@Entity

类使用注释是更好的选择。它为您提供

@Getter

、

@Setter

和

@NoArgsConstructor

，这正是 JPA 所需要的。