[java] No matching bean of type ... found for dependency

after some days of trying and waitin' for answers on the springsource forums I'll try it here. Running my application results in these exception:

org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.example.my.services.user.UserService] 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.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:924)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:793)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:707)
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478)
    org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
    javax.servlet.GenericServlet.init(GenericServlet.java:212)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    java.lang.Thread.run(Thread.java:662)

Here's the relevant code

application context:

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
  <property name="driverClassName" value="org.postgresql.Driver" />
  <property name="url" value="jdbc:postgresql://localhost:5432/test" />
  <property name="username" value="test" />
  <property name="password" value="test" />
</bean>

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="packagesToScan" value="com.example.my.entities.*" />
  <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
  <property name="hibernateProperties">
    <props>
      <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
      <prop key="hibernate.show_sql">true</prop>
    </props>
  </property>
</bean>

<tx:annotation-driven />
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory" ref="sessionFactory" />
</bean>

com.example.my.entities.user:

@Entity
@Table( name = "tbl_users" )
public class User
{
  @Id
  @Column( name = "id" )
  @GeneratedValue
  private int id;

  @Column( name = "username" )
  private String username;

  @Column( name = "password" )
  private String password;

  public void setId( int id )
  {
    this.id = id;
  }

  public int getId()
  {
    return id;
  }

  public void setUsername( String username )
  {
    this.username = username;
  }

  public String getUsername()
  {
    return username;
  }

  public void setPassword( String password )
  {
    this.password = password;
  }

  public String getPassword()
  {
    return password;
  }
}

service:

@Service
public class UserServiceImpl implements UserService
{
  @Autowired
  private UserDAO userDAO;

  @Override
  @Transactional
  public void addUser( User user )
  {
    userDAO.addUser( user );
  }

  @Override
  @Transactional
  public List<User> listUsers()
  {
    return userDAO.listUsers();
  }

  @Override
  @Transactional
  public void removeUser( int id )
  {
    userDAO.removeUser( id );
  }
}

IF this is only occurring on deployments, be sure that you have the dependency of the package you are referencing in the .war. For instance, this was working locally on my machine, with debug configurations working fine, but after deploying to Amazon's Elastic Beanstalk , I received this error and noticed one of the dependencies was not bundled in the .war package.

I had the same issue but in my case, implemented class was accidently become 'abstract' as a result autowiring was failing.

I have similar trouble in test config, because of using AOP. I added this line of code in spring-config.xml

<aop:config proxy-target-class="true"/>

And it works !

Add this to you applicationContext:

 <bean id="userService" class="com.example.my.services.user.UserServiceImpl ">

In my case it was the wrong dependecy for CrudRepository. My IDE added also follwing:

    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-commons</artifactId>
        <version>1.11.2.RELEASE</version>
    </dependency>

But I just needed:

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <version>RELEASE</version>
    </dependency>

I removed the first one and everything was fine.

I had a similar issue but I was missing the (@Service or @Component) from the implementation of com.example.my.services.myUser.MyUserServiceImpl

Add annotation @Repository to the head of userDao Class.If userDao is a interface,add this annotation to the implements of the interface.