Question

我的项目结构类似于此处链接的项目结构：https://stackoverflow.com/a/29583882/1243462。我有一个 util库，该库在一个JAR中包含一个Service类，该类将从另一个Java库/ Maven项目中使用。但是，我的Service类本身使用构造函数注入。因此，原始问题在哪里：

@Service
public class PermissionsService { ... }

我有

@Service
public class PermissionsService {

  public PermissionsService(@Autowired PermissionsDao dao) { 
   //assign private dao field to autowired dao
  }

}

而且，就像原始帖子一样，我想创建一个PermissionsService的实例并将其注入到我的客户/消费者应用程序中。我不确定如何创建Configuration类。

 @Configuration
 public class PersistenceConfig {

   public PermissionsService getPermissionsServiceBean() {
     //What goes here?
   }
}

目前，我有一种解决方法，其中我将@Autowired PermissionsDao构造函数参数替换为字段注入，并使用了无参数的构造函数。这使我能够：

 @Configuration
 public class PersistenceConfig {

   public PermissionsService getPermissionsServiceBean() {
     return new PermissionsService();
   }
}

但是，由于不鼓励使用字段注入，因此构造此代码的正确方法是什么？

Answer 1

在您的主模块中

describe(`interceptor: yourinterceptor`, () => { // CHANGE HERE
  let httpMock: HttpTestingController;
  let injector: TestBed;

  function createTestModule(providers: Provider[] = []) {
    TestBed.configureTestingModule({
      imports: [HttpClientTestingModule, RouterTestingModule],
      providers: [
        {
          provide: HTTP_INTERCEPTORS,
          useClass: YOUR_INTERCEPTOR, // CHANGE HERE
          multi: true
        },
        ...providers
      ]
    });
    injector = getTestBed();
    httpMock = injector.get(HttpTestingController);
  }

  beforeEach(() => {
    // empty
  });

  afterEach(() => {
    httpMock.verify();
  });

  describe('request with headers', () => {
    beforeEach(() => {
      createTestModule();
    });
    it('should make the request with headers', inject([HttpClient], (http: HttpClient) => {
      http.get('/dummy').subscribe();
      const httpRequest: TestRequest = httpMock.expectOne('/dummy');
      expect(httpRequest.request.headers.has("YOUR_HEADER")).toBeTruthy(); // CHANGE HERE

    }));
  });
});

在您的utils模块中

@Configuration
@Import(PersistenceConfig.class)
public class ServiceConfig() {

}

如果正确配置，则对@Configuration @ComponentScan(basePackages = {"path-to-persistence-service-and-any-dependencies"}) public class PersistenceConfig { }使用构造函数注入这一事实应该无关紧要。

@Autowire带有构造函数args的Spring Bean？

1 个答案: