Spring Boot ConflictingBeanDefinitionException:@Controller类的注释指定 Bean 名称

我一直在我的Spring启动应用程序中收到错误。我不完全确定如何解决它,我有几个带注释的类帮助建立Thymeleaf,Spring Security和Web。为什么应用程序尝试设置两次?(以及它在哪里尝试这样做?ConflictingBeanDefinitionException@ConfigurationhomeController

错误是:

org.springframework.beans.factory.BeanDefinitionStoreException: 
Failed to parse configuration class [org.kemri.wellcome.hie.Application]; nested exception is org.springframework.context.annotation.ConflictingBeanDefinitionException:
Annotation-specified bean name 'homeController' for bean class [org.kemri.wellcome.hie.HomeController] conflicts with existing, non-compatible bean definition of same name and class [org.kemri.wellcome.hie.controller.HomeController]

我的弹簧引导主应用程序初始值设定项:

@EnableScheduling
@EnableAspectJAutoProxy
@EnableCaching
@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application extends SpringBootServletInitializer {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
    
    @Override
    protected final SpringApplicationBuilder configure(final SpringApplicationBuilder application) {
        return application.sources(Application.class);
    }

}

我的数据库配置文件:

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(basePackages="org.kemri.wellcome.hie.repositories")
@PropertySource("classpath:application.properties")
public class DatabaseConfig {

  @Autowired
  private Environment env;

  @Autowired
  private DataSource dataSource;

  @Autowired
  private LocalContainerEntityManagerFactoryBean entityManagerFactory;

   @Bean
  public DataSource dataSource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName(env.getProperty("spring.datasource.driverClassName"));
    dataSource.setUrl(env.getProperty("spring.datasource.url"));
    dataSource.setUsername(env.getProperty("spring.datasource.username"));
    dataSource.setPassword(env.getProperty("spring.datasource.password"));
    return dataSource;
  }
  @Bean
  public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
    LocalContainerEntityManagerFactoryBean entityManagerFactory =
        new LocalContainerEntityManagerFactoryBean();
    
    entityManagerFactory.setDataSource(dataSource);
    
    // Classpath scanning of @Component, @Service, etc annotated class
    entityManagerFactory.setPackagesToScan(
        env.getProperty("spring.jpa.hibernate.entitymanager.packagesToScan"));
    
    // Vendor adapter
    HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
    entityManagerFactory.setJpaVendorAdapter(vendorAdapter);
    
    // Hibernate properties
    Properties additionalProperties = new Properties();
    additionalProperties.put(
        "hibernate.dialect", 
        env.getProperty("spring.jpa.hibernate.dialect"));
    additionalProperties.put(
        "hibernate.showsql", 
        env.getProperty("spring.jpa.hibernate.showsql"));
    additionalProperties.put(
        "hibernate.hbm2ddl.auto", 
        env.getProperty("spring.jpa.hibernate.hbm2ddl.auto"));
    entityManagerFactory.setJpaProperties(additionalProperties);
    
    return entityManagerFactory;
  }
  @Bean
  public JpaTransactionManager transactionManager() {
    JpaTransactionManager transactionManager = 
        new JpaTransactionManager();
    transactionManager.setEntityManagerFactory(
        entityManagerFactory.getObject());
    return transactionManager;
  }
  @Bean
  public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
    return new PersistenceExceptionTranslationPostProcessor();
  }

}

我的 Thymeleaf 配置文件:

@Configuration
public class ThymeleafConfig {

@Bean
public ServletContextTemplateResolver templateResolver(){
    ServletContextTemplateResolver thymeTemplateResolver = new ServletContextTemplateResolver();
    thymeTemplateResolver.setPrefix("/WEB-INF/views/");
    thymeTemplateResolver.setSuffix(".html");
    thymeTemplateResolver.setTemplateMode("HTML5");
    return thymeTemplateResolver;
}   

@Bean
public SpringSecurityDialect springSecurityDialect(){
    SpringSecurityDialect dialect = new SpringSecurityDialect();
    return dialect;
}

@Bean
public SpringTemplateEngine templateEngine() {
    SpringTemplateEngine engine = new SpringTemplateEngine();   
    engine.addTemplateResolver(templateResolver());
    Set<IDialect> dialects = new HashSet<IDialect>();
    dialects.add(springSecurityDialect());
    engine.setAdditionalDialects(dialects);     
    return engine;
}

@Bean
public ThymeleafViewResolver thymeleafViewResolver() {
    ThymeleafViewResolver resolver = new ThymeleafViewResolver();
    resolver.setTemplateEngine(templateEngine());
    resolver.setViewClass(ThymeleafTilesView.class);
    resolver.setCharacterEncoding("UTF-8");
    return resolver;
}

}

我的 Web 配置类:

@Configuration
@PropertySource("classpath:application.properties")
public class WebConfig extends WebMvcAutoConfigurationAdapter  {
    
    @Autowired
    private Environment env;
    
    @Bean
    public JavaMailSenderImpl javaMailSenderImpl() {
        JavaMailSenderImpl mailSenderImpl = new JavaMailSenderImpl();
        mailSenderImpl.setHost(env.getProperty("smtp.host"));
        mailSenderImpl.setPort(env.getProperty("smtp.port", Integer.class));
        mailSenderImpl.setProtocol(env.getProperty("smtp.protocol"));
        mailSenderImpl.setUsername(env.getProperty("smtp.username"));
        mailSenderImpl.setPassword(env.getProperty("smtp.password"));
        Properties javaMailProps = new Properties();
        javaMailProps.put("mail.smtp.auth", true);
        javaMailProps.put("mail.smtp.starttls.enable", true);
        mailSenderImpl.setJavaMailProperties(javaMailProps);
        return mailSenderImpl;
    }

    @Bean
    public CacheManager cacheManager() {
        return new ConcurrentMapCacheManager();
    }
}

我的控制器(设置控制器时出错)

@Controller
public class HomeController {
    
    private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
    
    /**
     * Simply selects the home view to render by returning its name.
     */
    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String home(Locale locale, Model model) {
        logger.info("Welcome home! The client locale is {}.", locale);
        
        Date date = new Date();
        DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);
        
        String formattedDate = dateFormat.format(date);
        
        model.addAttribute("serverTime", formattedDate );
        
        return "index.html";
    }
}

什么可能导致我的控制器类出现错误?ConflictingBeanDefinitionException


答案 1

我遇到了同样的问题,但出于不同的原因。

如果您在项目中移动类并且未能进行“清理”,也会发生这种情况。

我使用带有弹簧启动插件的gradle。现在我通常运行:

$> ./gradlew clean bootRun

答案 2

当我使用InteliJ运行Spring集成测试时,我在Spring集成测试中遇到了同样的问题。

在重构之后,我的一个控制器类实际上是在/out/production/classes目录中重复的,这是自2017.2版本以来Intelij的默认输出目录。由于 gradle 输出目录不同(它是 build/classes),因此 gradle clean 目标没有效果。

对我来说,解决方案是手动删除/out/production/classes并重新运行我的集成测试。

有关没有2个输出目录的可能持久解决方案,请参阅此处


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