java - 注入(inject) JpaRepository : Error creating bean with name

Question

我在将 JpaRepository 正确注入(inject)数据提供程序时遇到问题。

我在我的 EpisodieApiApplication.class 中添加了 @EnableJpaRepositories 注释位于包中:

package pl.hypeapp.episodie;

@Configuration
@EnableAutoConfiguration
@ComponentScan(basePackages = "pl.hypeapp.episodie.configuration")
@EnableAdminServer
@EnableJpaRepositories
public class EpisodieApiApplication extends SpringBootServletInitializer {

    public static void main(String[] args) {
        SpringApplication.run(EpisodieApiApplication.class, args);
    }

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
    return builder.sources(EpisodieApiApplication.class);
     }
}

DatabaseDataProviderConfiguration.class位于包装

package pl.hypeapp.episodie.configuration.dataprovider;

@Configuration
public class DatabaseDataProviderConfiguration {

   @Bean
   public TvShowDatabaseProvider tvShowDatabaseProvider(TvShowRepository tvShowRepository) {
   return new TvShowDatabaseProvider(tvShowRepository);
   }
}

TvShowRepository.class位于包中

package pl.hypeapp.episodie.dataproviders.database;

public interface TvShowRepository extends JpaRepository<TvShow, String> {
}

我的数据库提供者在模块 application/dataproviders/database DatabaseDataProvider.class

public class TvShowDatabaseProvider implements DoesTvShowExist, GetTvShowFromDatabase, InsertTvShowToDatabase {

    private final TvShowRepository tvShowRepository;

    public TvShowDatabaseProvider(TvShowRepository tvShowRepository) {
        this.tvShowRepository = tvShowRepository;
    }
}

TvShow.class位于包中:

package pl.hypeapp.core.entity.tvmaze;

@JsonIgnoreProperties(ignoreUnknown = true)
@Data
@Entity
public class TvShow {

    @JsonProperty("id")
    public Integer id;
}

但是我得到了这个错误:

Error creating bean with name 'tvShowDatabaseProvider' defined in class path resource [pl/hypeapp/episodie/configuration/dataprovider/DatabaseDataProviderConfiguration.class]: Unsatisfied dependency expressed through method 'tvShowDatabaseProvider' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'tvShowRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class pl.hypeapp.core.entity.tvmaze.TvShow

完整代码位于 github但它不完整，可能由于缺少类而无法工作

Answer 1

您正在使用构造函数注入(inject)来注入(inject) TvShowRepository bean 并且 @Autowired 缺少 TvShowDatabaseProvider 的构造函数，因此您需要添加如下所示:

public class TvShowDatabaseProvider implements 
             DoesTvShowExist, GetTvShowFromDatabase, 
             InsertTvShowToDatabase {

    private final TvShowRepository tvShowRepository;

    @Autowired //add this
    public TvShowDatabaseProvider(TvShowRepository tvShowRepository) {
        this.tvShowRepository = tvShowRepository;
    }
}