从 MapStruct 映射器访问 Spring 引导应用程序中的应用程序 属性

Question

我想从 application.yml 一个 Spring 引导应用程序访问 basic-info.expiration。

application.yml

basic-info:
  expiration: 6

UserMapper.java

@Mapper(componentModel = "spring")
public interface UserMapper {

  @Value("${basic-info.expiration}")
  static long expireInMonths = 0;
  // ^^^^^^^^^^^^^^^^^^^^^^^^^^^

  @Mapping(target = "requireBasicInfoUpdate", source = "user", qualifiedByName = "isBasicInfoUpdateRequired")
  UserDto toUserDto(User user);

  @Named("isBasicInfoUpdateRequired")
  default Boolean isBasicInfoUpdateRequired(User user) {
    final var expireDate = LocalDate.now().minusMonths(expireInMonths);
    final var lastUpdatedOn = user.getBasicInfoUpdatedDate().toInstant().atZone(ZoneId.systemDefault()).toLocalDate();

    return expireDate.isAfter(lastUpdatedOn);
  }
}

如何使用 MapStruct

注入 属性 值

Answer 1

作为@M。 Deinum 建议，接口已更改为抽象 class。这是最受欢迎的方法，因为应用程序不需要重构。

@Mapper(componentModel = "spring")
public abstract class UserMapper {
  @Value("${basic-info.expiration}")
  long expireInMonths = 0;

  @Mapping(target = "requireBasicInfoUpdate", source = "user", qualifiedByName = "isBasicInfoUpdateRequired")
  public abstract UserDto toUserDto(User user);

  @Named("isBasicInfoUpdateRequired")
  public Boolean isBasicInfoUpdateRequired(User user) {
    final var expireDate = LocalDate.now().minusMonths(expireInMonths);
    final var lastUpdatedOn = user.getBasicInfoUpdatedDate().toInstant().atZone(ZoneId.systemDefault()).toLocalDate();

    return expireDate.isAfter(lastUpdatedOn);
  }
}