java - 来自 application.properties 的 Mapstruct 值

Question

是否可以从 application.properties 文件的字段中设置值？

我正在寻找类似的东西

    @Mapping(target="version", expression="${application.version}")
    StateDto stateToStateDto(State state);

其中 application.version=v1 来自 application.properties 文件。

Answer 1

考虑一个“实用服务”，例如:

@Service
public class PropertyService {

  @org.springframework.beans.factory.annotation.Value("${application.version}")
  private String appVersion;

  // accessors, more properties/stuff..
}

然后你可以定义你的映射:

@Mapper(// ..., ...
   componentModel = "spring")
public abstract class StateMapper {

  @Autowired
  protected PropertyService myService;

  @org.mapstruct.Mapping(target="version", expression="java(myService.getAppVersion())")
  public abstract StateDto stateToStateDto(State state);
  // ...
}

另见:

• Mapstruct - How can I inject a spring dependency in the Generated Mapper class
• Mapstruct Expressions

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My minimal solution @github