无法自动连线字段/预期至少有1个有资格作为自动连线候选者的bean

Question

我对Spring还是很陌生，尽管我以前曾在几个项目中使用过它，并且看到过很多类似的问题，但我无法弄清楚此异常是怎么回事：

SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'applicationController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: public service.UserServiceI controller.ApplicationController.userService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [service.UserServiceI] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=userService)}

这是堆栈跟踪的相关部分。

这是我的控制器类：

@Controller
@RequestMapping("/")
public class ApplicationController {

@Autowired 
@Qualifier("userService")
public UserServiceI userService;
}

这是我的UserService界面：

public interface UserService {
   //methods
}

和实现：

@Service("userService")
public class UserServiceI implements UserService{

@Autowired
private UserDao dao;

//methods
}

这是我的XML配置文件：

<context:component-scan base-package="configuration">
</context:component-scan>


<bean id="resView" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
    <property name="prefix" value="/WEB-INF/" />
    <property name="suffix" value=".jsp" />
</bean>
<mvc:default-servlet-handler/>
<mvc:resources location="/resources/css/" mapping="/resources/css/*">
</mvc:resources>
<mvc:resources location="/resources/js/" mapping="/resources/js/*">
</mvc:resources>
<context:annotation-config></context:annotation-config>
<mvc:annotation-driven></mvc:annotation-driven>
<mvc:default-servlet-handler />
<context:component-scan base-package="controller">
</context:component-scan>

<context:component-scan base-package="dao"></context:component-scan>
<context:component-scan base-package="model"></context:component-scan>
<context:component-scan base-package="service"
    use-default-filters="true">
</context:component-scan>

这是Spring配置：

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "{configuration, controller, dao, model,    service}")
public class SpringConfig extends WebMvcConfigurerAdapter{

@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
     InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
     viewResolver.setViewClass(JstlView.class);
     viewResolver.setPrefix("/WebContent/");
     viewResolver.setSuffix(".jsp");
     registry.viewResolver(viewResolver);
}

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}

}

和休眠配置：

@Configuration
@EnableTransactionManagement
@ComponentScan({"configuration", "controller", "dao", "model", "service"})
@PropertySource(value = {"classpath:appProperties"})
public class HibernateConfig {

@Autowired
private Environment environment;

@Bean
public LocalSessionFactoryBean sessionFactory(){
    LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
    sessionFactory.setDataSource(dataSource());
    sessionFactory.setPackagesToScan(new String[] {"model"});
    sessionFactory.setHibernateProperties(hibernateProperties());
    return sessionFactory;
}

@Bean
public DataSource dataSource(){
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));
    dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));
    dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));
    dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));
    return dataSource;
}

@Bean
public Properties hibernateProperties(){
    Properties hibernateProperties = new Properties();
    hibernateProperties.put("hibernate.dialect",environment.getRequiredProperty("hibernate.dialect"));
    hibernateProperties.put("hibernate.show_sql", environment.getRequiredProperty("hibernate.show_sql"));
    hibernateProperties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));
    return hibernateProperties;
}

@Bean
@Autowired
public HibernateTransactionManager transactionManager(SessionFactory s) {
    HibernateTransactionManager txManager = new HibernateTransactionManager();
    txManager.setSessionFactory(s);
    return txManager;
}
}

和pom.xml

<dependencies>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.2.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>4.2.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.2.3</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>4.2.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>4.2.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.2.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>4.2.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-orm</artifactId>
    <version>4.2.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>4.3.6.Final</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.31</version>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.2</version>
</dependency>

我注释了Controller中的代码，结果是，尽管已定义，但它无法自动装配SessionFactory。请帮助我！

Answer 1

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Answer 2

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