自动生成需要另一个bean的bean来创建对象

Question

我有一节课，要跟著自动装配

public class XYZ {

@Autowired
private Principal principal;

public void main() {
AlexandriaDownloadSignatureUtilityV1 downloadSignatureUtilV1 =
                new AlexandriaDownloadSignatureUtilityV1(
                        getMaterialsetNameProvider(principal),
               
                );
}
}

我想自动创建AlexandriaDownloadSignatureUtilityV1依赖关系，但是由于它依赖于pricipal bean，您能告诉我如何做到吗？

Answer 1

@Component
public class XYZ {

@Autowired
private Principal principal;

public void main() {
AlexandriaDownloadSignatureUtilityV1 downloadSignatureUtilV1 =
                new AlexandriaDownloadSignatureUtilityV1(
                        getMaterialsetNameProvider(principal),
               
                );
}
}

在类顶部添加@Component --这将创建该对象的bean，并注入它们的依赖项