Java 未找到依赖项：预计至少有 1 个 bean 有资格作为此依赖项的自动装配候选者。依赖注解：

No found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations:

提问by user2659694

I am trying to write a SOAP service using Spring, however I receive a Dependency Injection issue. I'm having problems using @Autowiredthrough the Service like this:

我正在尝试使用 Spring 编写一个 SOAP 服务，但是我收到了一个依赖注入问题。我在@Autowired通过服务使用时遇到问题，如下所示：

    public interface UserDao {
    User getUser(String username);
}

Implementation for Dao as below:

Dao的实现如下：

  @Controller("userDao")
    public class UserDaoImpl implements UserDao {
    private static Log log = LogFactory.getLog(UserDaoImpl.class);

    @Autowired
    @Qualifier("sessionFactory")
    private LocalSessionFactoryBean sessionFactory;

    @Override
    public User getUser(String username) {
        Session session = sessionFactory.getObject().openSession();
        // Criteria query = session.createCriteria(Student.class);
        Query query = session
                .createQuery("from User where username = :username");
        query.setParameter("username", username);
        try {
            System.out.println("\n Load Student by ID query is running...");
            /*
             * query.add(Restrictions.like("id", "%" + id + "%",
             * MatchMode.ANYWHERE)); return (Student) query.list();
             */
            return (User) query.uniqueResult();
        } catch (Exception e) {
            // TODO: handle exception
            log.info(e.toString());
        } finally {
            session.close();
        }
        return null;
    }

}

and

和

public interface UserBo {
    User loadUser(String username);
}

and

和

public class UserBoImpl implements UserBo {
    @Autowired
    private UserDao userDao;

    @Override
    public User loadUser(String username) {
        // TODO Auto-generated method stub
        return userDao.getUser(username);
    }

}


@WebService
@Component
public class UserService {

    @Autowired
    private UserBo userBo;

    @WebMethod(operationName = "say")
    public String sayHello(String name) {
        return ("Hello Java to " + name);
    }

    @WebMethod(operationName = "getUser")
    public User getUser(String username) {
        return userBo.loadUser(username);
    }
}

The below is xml mapping file

下面是xml映射文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ws="http://jax-ws.dev.java.net/spring/core"
    xmlns:wss="http://jax-ws.dev.java.net/spring/servlet"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://jax-ws.dev.java.net/spring/core
    http://jax-ws.java.net/spring/core.xsd
    http://jax-ws.dev.java.net/spring/servlet
    http://jax-ws.java.net/spring/servlet.xsd

    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-4.0.xsd">
    <context:annotation-config />

    <context:component-scan base-package="edu.java.spring.ws"></context:component-scan>
    <context:component-scan base-package="edu.java.spring.ws.dao"></context:component-scan>
    <bean id="userDao" class="edu.java.spring.ws.dao.UserDaoImpl"></bean>
    <!-- <context:component-scan base-package="edu.java.spring.ws.bo"></context:component-scan>
     -->
    <wss:binding url="/user">
        <wss:service>
            <ws:service bean="#userService" />
        </wss:service>
    </wss:binding>
    <bean id="userBo" class="edu.java.spring.ws.bo.impl.UserBoImpl"></bean>
    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/contentdb" />
        <property name="username" value="root" />
        <property name="password" value="123456" />
    </bean>
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
        <property name="packagesToScan" value="edu.java.spring.ws.model" />
    </bean>
</beans>

And the error thrown when deploying is: Here is the updated stack trace:

部署时抛出的错误是：这是更新的堆栈跟踪：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.sun.xml.ws.transport.http.servlet.SpringBinding#0' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Cannot create inner bean '(inner bean)#538071ba' of type [org.jvnet.jax_ws_commons.spring.SpringService] while setting bean property 'service'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#538071ba' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Cannot resolve reference to bean 'userService' while setting bean property 'bean'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private edu.java.spring.ws.bo.UserBo edu.java.spring.ws.UserService.userBo; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userBo': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private edu.java.spring.ws.dao.UserDao edu.java.spring.ws.bo.impl.UserBoImpl.userDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [edu.java.spring.ws.dao.UserDao] 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)}
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:290)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:129)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1456)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1197)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4992)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5490)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#538071ba' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Cannot resolve reference to bean 'userService' while setting bean property 'bean'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private edu.java.spring.ws.bo.UserBo edu.java.spring.ws.UserService.userBo; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userBo': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private edu.java.spring.ws.dao.UserDao edu.java.spring.ws.bo.impl.UserBoImpl.userDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [edu.java.spring.ws.dao.UserDao] 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)}
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:336)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1456)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1197)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:276)
    ... 24 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private edu.java.spring.ws.bo.UserBo edu.java.spring.ws.UserService.userBo; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userBo': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private edu.java.spring.ws.dao.UserDao edu.java.spring.ws.bo.impl.UserBoImpl.userDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [edu.java.spring.ws.dao.UserDao] 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)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
    ... 30 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private edu.java.spring.ws.bo.UserBo edu.java.spring.ws.UserService.userBo; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userBo': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private edu.java.spring.ws.dao.UserDao edu.java.spring.ws.bo.impl.UserBoImpl.userDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [edu.java.spring.ws.dao.UserDao] 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)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
    ... 38 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userBo': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private edu.java.spring.ws.dao.UserDao edu.java.spring.ws.bo.impl.UserBoImpl.userDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [edu.java.spring.ws.dao.UserDao] 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)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1017)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:960)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
    ... 40 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private edu.java.spring.ws.dao.UserDao edu.java.spring.ws.bo.impl.UserBoImpl.userDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [edu.java.spring.ws.dao.UserDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
    ... 51 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [edu.java.spring.ws.dao.UserDao] 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)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1103)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:963)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
    ... 53 more

回答by Nilesh

You seems to be missing implementation for interface UserDao. If you look at the exception closely it says

您似乎缺少接口 UserDao 的实现。如果您仔细查看异常，它会说

No qualifying bean of type [edu.java.spring.ws.dao.UserDao] found for dependency:

找不到类型为 [edu.java.spring.ws.dao.UserDao] 的合格 bean 依赖项：

The way @Autowiredworks is that it would automatically look for implementation of a dependency you inject via an interface. In this case since there is no valid implementation of interface UserDao you get the error.Ensure you have a valid implementation for this class and your error should go.

工作的方式@Autowired是它会自动查找您通过接口注入的依赖项的实现。在这种情况下，因为接口 UserDao 没有有效的实现，你会得到错误。确保你有这个类的有效实现，你的错误应该消失。

Hope that helps.

希望有帮助。

回答by Jens

Add the annotation @Repositoryto the implementation of UserDaoImpl

将注解添加@Repository到实现UserDaoImpl

@Repository
public class UserDaoImpl implements UserDao {
    private static Log log = LogFactory.getLog(UserDaoImpl.class);

    @Autowired
    @Qualifier("sessionFactory")
    private LocalSessionFactoryBean sessionFactory;

    //...

}

回答by diegomtassis

Look at the exception:

看一下异常：

No qualifying bean of type [edu.java.spring.ws.dao.UserDao] found for dependency

This means that there's no bean available to fulfill that dependency. Yes, you have an implementation of the interface, but you haven't created a bean for that implementation. You have two options:

这意味着没有可用于满足该依赖性的 bean。是的，您有接口的实现，但是您还没有为该实现创建 bean。您有两个选择：

• Annotate UserDaoImplwith @Componentor @Repository, and let the component scan do the work for you, exactly as you have done with UserService.
• Add the bean manually to your xml file, the same you have done with UserBoImpl.

• UserDaoImpl使用@Component或 进行注释@Repository，让组件扫描为您完成工作，就像您使用 所做的一样UserService。
• 手动将 bean 添加到您的 xml 文件中，与您对UserBoImpl.

Remember that if you create the bean explicitly you need to put the definition before the component scan. In this case the order is important.

请记住，如果您显式创建 bean，则需要在组件扫描之前放置定义。在这种情况下，顺序很重要。

回答by user2659694

I missed to add

我错过了添加

@Controller("userBo") into UserBoImpl class.

The solution for this is adding this controller into Impl class.

解决方案是将此控制器添加到 Impl 类中。

回答by Kumar Gaurav Sharma

Add repository annotation before your DAO Implementation Class. example:

在您的 DAO 实现类之前添加存储库注释。例子：

@Repository
public class EmpDAOImpl extends BaseNamedParameterJdbcDaoSupportUAM 
implements EmpDAO{ 
}

回答by Georgi Georgiev

I added @Servicebefore impl class and the error is gone.

我@Service在 impl 类之前添加，错误消失了。

@Service
public class FCSPAnalysisImpl implements FCSPAnalysis
{}

回答by Jitendra Nandre

We face this issue but had different reason, here is the reason:

我们面临这个问题，但有不同的原因，原因如下：

In our project found multiple bean entry with same bean name. 1 in applicationcontext.xml & 1 in dispatcherServlet.xml

在我们的项目中发现了多个具有相同 bean 名称的 bean 条目。1 在 applicationcontext.xml & 1 在 dispatcherServlet.xml

Example:

例子：

<bean name="dataService" class="com.app.DataServiceImpl">
<bean name="dataService" class="com.app.DataServiceController">

& we are trying to autowired by dataService name.

& 我们正在尝试通过 dataService 名称自动装配。

Solution:we changed the bean name & its solved.

解决方案：我们更改了 bean 名称并解决了。

回答by OAM

In my case I had to move the @Serviceannotation from the interface to the implementation class.

就我而言，我不得不将@Service注释从接口移到实现类。

回答by WesternGun

In my case, the application context is not loaded because I add @DataJpaTestannotation. When I change it to @SpringBootTestit works.

就我而言，应用程序上下文未加载，因为我添加了@DataJpaTest注释。当我将其更改为@SpringBootTest它时。

@DataJpaTestonly loads the JPA part of a Spring Boot application. In the JavaDoc:

@DataJpaTest只加载 Spring Boot 应用程序的 JPA 部分。在 JavaDoc 中：

Annotation that can be used in combination with @RunWith(SpringRunner.class)for a typical JPA test. Can be used when a test focuses onlyon JPA components. Using this annotation will disable full auto-configuration and instead apply only configuration relevant to JPA tests.

By default, tests annotated with @DataJpaTestwill use an embedded in-memory database (replacing any explicit or usually auto-configured DataSource). The @AutoConfigureTestDatabaseannotation can be used to override these settings. If you are looking to load your full application configuration, but use an embedded database, you should consider @SpringBootTestcombined with @AutoConfigureTestDatabaserather than this annotation.

可与@RunWith(SpringRunner.class)典型 JPA 测试结合使用的注释。当测试仅关注 JPA 组件时可以使用。使用此注释将禁用完全自动配置，而是仅应用与 JPA 测试相关的配置。

默认情况下，带有注释的测试@DataJpaTest将使用嵌入式内存数据库（替换任何显式或通常自动配置的数据源）。该@AutoConfigureTestDatabase注释可以用来覆盖这些设置。如果您希望加载完整的应用程序配置，但使用嵌入式数据库，则应考虑@SpringBootTest结合使用@AutoConfigureTestDatabase而不是此注释。

回答by kris

Could me multiple reason for this. But you want might forget to add as @Bean for component which you have did @Autowired.

我能不能有多种原因。但是您可能会忘记为您已经使用@Autowired 的组件添加@Bean。

In my case, i have forgot to decorate with @Bean which causing this issue.

就我而言，我忘记用导致此问题的 @Bean 进行装饰。