找不到符合类型的匹配bean [英] No matching bean of type ... found for dependency
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问题描述
运行我的应用程序导致这些异常：
org.springframework.beans.factory.NoSuchBeanDefinitionException：为依赖关系找到类型为[com.example.my.services.user.UserService]的类型：期望至少1个符合此依赖关系自动装配候选资格的bean。依赖注释：{@ org.springframework.beans.factory.annotation.Autowired（required = true）}
org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException（DefaultListableBeanFactory.java:924）
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.suppo rt.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.valve s.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）
以下是相关的代码：
应用程序上下文：
< ; bean id =dataSourceclass =org.apache.commons.dbcp.BasicDataSourcedestroy-method =close>
< property name =driverClassNamevalue =org.postgresql.Driver/>
< property name =urlvalue =jdbc：postgresql：// localhost：5432 / test/>
< property name =usernamevalue =test/>
< property name =passwordvalue =test/>
< / bean>
< bean id =sessionFactoryclass =org.springframework.orm.hibernate3.LocalSessionFactoryBean>
< property name =dataSourceref =dataSource/>
< property name =packagesToScanvalue =com.example.my.entities。*/>
< property name =configurationClassvalue =org.hibernate.cfg.AnnotationConfiguration/>
< property name =hibernateProperties>
<道具>
< prop key =hibernate.dialect> org.hibernate.dialect.PostgreSQLDialect< / prop>
< prop key =hibernate.show_sql> true< / prop>
< /道具>
< / property>
< / bean>
< tx：annotation-driven />
< bean id =transactionManagerclass =org.springframework.orm.hibernate3.HibernateTransactionManager>
< property name =sessionFactoryref =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;
$ / code $ / pre
$ b $ p
@Service
public class UserServiceImpl implements UserService
{
@Autowired
private UserDAO userDAO;
@Override
@Transactional
public void addUser（用户用户）
{
userDAO.addUser（user）;
}
@Override
@Transactional
public List< User> listUsers（）
{
return userDAO.listUsers（）;
}
@Override
@Transactional
public void removeUser（int id）
{
userDAO.removeUser（id）;
}
}
解决方案多个事情可能会导致这种情况，我没有费心去检查你的整个存储库，所以我会在这里出去。
首先，你可能会错过注释（@Service或@Component）来自 com.example.my.services.user.UserService 的实现，如果您使用注释进行配置。如果您仅使用xml，那么您可能会错过UserService实现的< bean> -definition。
如果您使用注释并正确注释实现，请检查扫描实现所在的包（检查< context：component-scan base-package = -value）。
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 );
}
}
解决方案 Multiple things can cause this, I didn't bother to check your entire repository, so I'm going out on a limb here.
First off, you could be missing an annotation (@Service or @Component) from the implementation of com.example.my.services.user.UserService, if you're using annotations for configuration. If you're using (only) xml, you're probably missing the <bean> -definition for the UserService-implementation.
If you're using annotations and the implementation is annotated correctly, check that the package where the implementation is located in is scanned (check your <context:component-scan base-package= -value).
这篇关于找不到符合类型的匹配bean的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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