下面是我的SourceRepository类，它不覆盖自动生成的返回Iterable的通用findAll（

package com.infostream.repositories;

import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.repository.PagingAndSortingRepository;

import com.infostream.models.Source;

public interface SourceRepositoryImpl extends PagingAndSortingRepository<Source, Long>{

    Page<Source> findAll(Pageable pageRequest);

}

下面是我的服务类：

package com.infostream.services;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Component;

import com.infostream.models.Source;
import com.infostream.repositories.SourceRepositoryImpl;

@Component
public class SourcesService {
    @Autowired
    private SourceRepositoryImpl sourceRepository;

    public PageImpl<Source> getPaginatedSources(Pageable pageRequest) {
        Page<Source> searchResultPage = sourceRepository.findAll(pageRequest);
        return new PageImpl<Source>(searchResultPage.getContent(), pageRequest, searchResultPage.getTotalElements()); 
    }

    public Iterable<Source> getAllSources() {
        return sourceRepository.findAll();
    }
}

这是我的主类，我将它作为Java应用程序运行。

package com.infostream.services;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import com.infostream.consumers.RssArticleConsumer;
import com.infostream.models.Article;
import com.infostream.models.Source;
import com.infostream.producers.RssXmlProducer;

public class HarvestService {

    private static BlockingQueue<Article> article_queue = new ArrayBlockingQueue<Article>(10);

    @Autowired
    private static SourcesService sourcesService;

    public static void main(String[] args) throws InterruptedException {

        Iterable<Source> sources = sourcesService.getAllSources();

        /*
        for(Source s : sources) {
            System.out.println(s.getUrl());
        }

        Thread t1 = new Thread(new RssXmlProducer(sources.iterator().next(), article_queue));
        Thread t2 = new Thread(new RssArticleConsumer(article_queue));

        t1.start();
        t2.start();

        t1.join();
        t2.join();
        */      
    }

}

sourcesService变量为空，我看到自动安装不起作用，但我不知道为什么。这是因为我在包资源管理器中右键单击HarvestService文件并单击作为Java应用程序运行，将其作为Java应用程序运行吗？