我已經(jīng)開始使用 spring data elasticsearch 并且一直在查看這里的示例。我無法理解如何@Autowired工作。考慮以下：IMessageProcessor.java:package message.processor;public interface IMessageProcessor {    void processMessage();}MyMessageProcessor.javapackage message.processor;@Componentpublic class MyMessageProcessor implements IMessageProcessor {    @Autowired    private ArticleServiceImpl articleService;    private final Author johnSmith = new Author("John Smith");    private final Author johnDoe = new Author("John Doe");    @Override    public void processMessage() {        Article article = new Article("Spring Data Elasticsearch");        article.setAuthors(asList(johnSmith, johnDoe));        article.setTags("elasticsearch", "spring data");        articleService.save(article);           }   }MyMessageProcessorIT.javapackage message.processor;@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(classes = Config.class)public class MyMessageProcessorIT {    @Autowired    private ElasticsearchTemplate elasticsearchTemplate;    @Before    public void before() {        elasticsearchTemplate.deleteIndex(Article.class);        elasticsearchTemplate.createIndex(Article.class);    }    @Test    void testProcessMessage() {        MyMessageProcessor msgProcessor = new MyMessageProcessor();        msgProcessor.processMessage();    }}每當(dāng)我運(yùn)行單元測(cè)試時(shí)，articleServiceinMyMessageProcessor總是null. 我需要額外的配置才能使自動(dòng)裝配工作嗎？所有其他代碼與上面鏈接的 github 存儲(chǔ)庫中的相同。如何確保在我需要使用的項(xiàng)目中的任何地方ArticleServiceImpl都正確地自動(dòng)連接？我似乎有過同樣問題的其他帖子，但似乎沒有一個(gè)解決方案適用于我下面的示例。