這是我第一次嘗試爲Spring數據JPA與Spring MVC和我沒有能夠解決這個錯誤。型沒有合格豆「com.example.repo.UserRepository」可用
錯誤日誌
嚴重:異常發送上下文初始化事件監聽器類org.springframework.web.context.ContextLoaderListener的實例 org.springframework.beans.factory.UnsatisfiedDependencyException:錯誤創建與豆名稱'mainController':通過字段'userRepository'表示的不滿足的依賴關係;嵌套的例外是org.springframework.beans.factory.NoSuchBeanDefinitionException:類型com.example.repo.UserRepository「提供的沒有合格豆:預計將有至少1 Bean上有資格作爲自動裝配候選人。依賴註解:{@ org.springframework.beans.factory.annotation.Autowired(必需=真)} 在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) 的組織。 springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) 在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) 在org.springframework.beans.factory。 support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) at org.sp ringframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) 在org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject(AbstractBeanFactory.java:306) 在org.springframework.beans.factory .support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 在org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:197) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(Ab stractApplicationContext.java:866) 在org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) 在org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444) 在有機springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) at org.apache.catalina.core.StandardContext.listenerStart( (org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org。)。 apache.catalina.core .ContainerBase $ StartChild.call(ContainerBase.java:1419) at org.apache.catalina.core.ContainerBase $ StartChild.call(ContainerBase.java:1409) at java.util.concurrent.FutureTask.run(FutureTask.java :266) 在java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 在java.util.concurrent.ThreadPoolExecutor中的$ Worker.run(ThreadPoolExecutor.java:617) 在java.lang.Thread.run (Thread.java:745) 所致:org.springframework.beans.factory.NoSuchBeanDefinitionException:類型com.example.repo的」不符合條件的豆。UserRepository'可用:預計至少有1個bean有資格作爲autowire候選者。依賴註解:{@ org.springframework.beans.factory.annotation.Autowired(所需=真)} 在org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1486) 在org.springframework。在org.springframework.beans.factory.annotation上的beans.factory.support.DefaultListableBeanFactory.doResolveDependency AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) ...... 24多個
UserRepository.java
@Repository
public interface UserRepository extends CrudRepository<User, Integer> {
}
MainController.java
@Controller
@RequestMapping("/")
public class MainController {
@Autowired
private UserRepository userRepository;
@RequestMapping(value = "/user", method = RequestMethod.POST, headers = "Accept=application/json")
@ResponseBody
public ResponseEntity<User> addUser(@RequestBody User user) {
userRepository.save(user);
System.out.println("------>>>>>>>>>>" + user.getName());
HttpHeaders headers = new HttpHeaders();
return new ResponseEntity<User>(headers, HttpStatus.OK);
}
@RequestMapping(value = "/user/list", method = RequestMethod.GET)
public ResponseEntity<List<User>> listAllUsers() {
List<User> users = (List<User>)userRepository.findAll();
if (users.isEmpty()) {
System.out.println("List is empty oops..!!");
return new ResponseEntity<List<User>>(HttpStatus.NO_CONTENT);
}
System.out.println("Got the List...!!");
System.out.println("Name of First User---->>>>" + users.get(0).getName());
return new ResponseEntity<List<User>>(users, HttpStatus.OK);
}
}
AppConfig.java
@Configuration
@ComponentScan("com.example")
@EnableWebMvc
@EnableJpaRepositories
@EnableTransactionManagement
public class AppConfig {
@Bean
public InternalResourceViewResolver viewResolver(){
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF");
resolver.setSuffix(".html");
return resolver;
}
@Bean
public DataSource dataSource(){
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/spring_database");
dataSource.setUsername("root");
dataSource.setPassword("");
return dataSource;
}
@Bean
public EntityManagerFactory entityManagerFactory(){
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setShowSql(true);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan(User.class.getPackage().getName());
factory.setDataSource(dataSource());
factory.afterPropertiesSet();
return factory.getObject();
}
@Bean
public PlatformTransactionManager transactionManager(){
JpaTransactionManager txManager = new JpaTransactionManager();
txManager.setEntityManagerFactory(entityManagerFactory());
return txManager;
}
}
User.java
@Entity
@Table(name="user")
public class User {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
private String name;
private String email;
/*Getters and Setters*/
這是我的項目結構
我失去的是什麼?或者我在這裏犯了什麼錯誤?有誰能解決這個問題嗎
你需要告訴我們每一個這些類的包。 –
'@ComponentScan(「com.exampl」)'E缺失 – 2017-03-16 07:53:44
@JBNizet我附上了我的項目結構圖片 – Dishank