考虑在配置中定义“服务”类型的bean [Spring boot]

Z时代
2024-01-10
分类：问答

运行主类时出现错误。

Action: Consider defining a bean of type 'seconds47.service.TopicService' in your configuration. Description: Field topicService in seconds47.restAPI.topics required a bean of type 'seconds47.service.TopicService' that could not be found

TopicService接口：

public interface TopicService {
    TopicBean findById(long id);
    TopicBean findByName(String name);
    void saveTopic(TopicBean topicBean);
    void updateTopic(TopicBean topicBean);
    void deleteTopicById(long id);
    List<TopicBean> findAllTopics();
    void deleteAllTopics();
    public boolean isTopicExist(TopicBean topicBean);
}

控制器：

@RestController
public class topics {
    @Autowired
    private TopicService topicService;
    @RequestMapping(path = "/new_topic2", method = RequestMethod.GET)
    public void new_topic() throws Exception {
        System.out.println("new topic JAVA2");
    }
}

实现类：

public class TopicServiceImplementation implements TopicService {
    @Autowired
    private TopicService topicService;
    @Autowired
    private TopicRepository topicRepository;
    @Override
    public TopicBean findById(long id) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
    @Override
    public TopicBean findByName(String name) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
    @Override
    public void saveTopic(TopicBean topicBean) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
    @Override
    public void updateTopic(TopicBean topicBean) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
    @Override
    public void deleteTopicById(long id) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
    @Override
    public List<TopicBean> findAllTopics() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
    @Override
    public void deleteAllTopics() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
    @Override
    public boolean isTopicExist(TopicBean topicBean) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}

其余的类也已定义。我不知道为什么要componentScan在主要班级宣布这一点。

主班：

@SpringBootApplication(exclude = {SecurityAutoConfiguration.class })
@ComponentScan(basePackages = {"seconds47"})
@EnableJpaRepositories("seconds47.repository")
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

我有这样的包裹：

seconds47 seconds47.beans seconds47.config seconds47.repository seconds47.restAPI seconds47.service