考虑在您的配置中定义一个“服务"类型的 bean [Spring boot] [英] Consider defining a bean of type 'service' in your configuration [Spring boot]
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问题描述
运行主类时出错.
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:
TopicService interface:
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.尽管在主类中声明了 componentScan
,但我不知道为什么它会抛出.
Rest of the classes are defined too. I don't know why its throwing despite declaring componentScan
in main class.
主类:
@SpringBootApplication(exclude = {SecurityAutoConfiguration.class })
@ComponentScan(basePackages = {"seconds47"})
@EnableJpaRepositories("seconds47.repository")
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
我的包裹是这样的:
seconds47
seconds47.beans
seconds47.config
seconds47.repository
seconds47.restAPI
seconds47.service
推荐答案
一个类必须有 @Component
注释或它的派生(如 @Service
, @Repository
等)被组件扫描识别为 Spring bean.因此,如果您将 @Component
添加到类中,它应该可以解决您的问题.
A class must have the @Component
annotation or a derivation of that (like @Service
, @Repository
etc.) to be recognized as a Spring bean by the component scanning. So if you add @Component
to the class, it should solve your problem.
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