spring-mvc - NoUniqueBeanDefinitionException: タイプの適格な Bean が定義されていません: 単一の一致する Bean が予想されますが、2 が見つかりました

Question

Springs MVC を使用して GAE Web プロジェクトを構成しようとすると、以下の例外が発生します。ファイルで次の構成を使用しました。Springs の spring-3.2.3 バージョンを使用しており、すでにクラスパスにspring-bean-3.2.3.jarがあります。

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd">

    <context:annotation-config />

    <context:component-scan base-package="com.myweb.webservices" />

    <bean id="cnManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
        <property name="favorPathExtension" value="true"/>
        <property name="ignoreAcceptHeader" value="true" />
        <property name="defaultContentType" value="text/html" />
        <property name="useJaf" value="false"/>

        <property name="mediaTypes">
            <map>
                <entry key="html" value="text/html" />
                <entry key="json" value="application/json" />
                <entry key="xml" value="application/xml" />
            </map>
        </property>
    </bean>

    <mvc:annotation-driven/>
    <mvc:annotation-driven content-negotiation-manager="cnManager"/>

    <bean class="com.myweb.webservices.spring.MvcConfiguringPostProcessor" />
</beans>

spring-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd">


    <context:annotation-config />
    <context:component-scan base-package="com.myweb.webservices."/>
    <context:component-scan base-package="com.myweb.webservices.dao"/>
    <context:component-scan base-package="com.myweb.webservices.service"/>
    <context:component-scan base-package="com.myweb.webservices.controller"/>

    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" 
      p:prefix="/jsp/" p:suffix=".jsp" />
</beans>

GenericDao.java

public interface GenericDao {
    public <T> void create(T t);
}

AbstractGenericDaoImpl.java

public abstract class AbstractGenericDaoImpl implements GenericDao{

    static {
        ObjectifyService.register(User.class);
    }

    @Override
    public <T> void create(T t) {
        ofy().save().entity(t).now();
    }
}

GenericService.java

public interface GenericService {
    public <T> void create(T t);
}

AbstractGenericServiceImpl.java

public abstract class AbstractGenericServiceImpl implements GenericService{

    @Autowired
    GenericDao genericDao;

    @Override
    public <T> void create(T t) {
        genericDao.create(t);
    }
}

例外

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.filterChains': Cannot resolve reference to bean 'org.springframework.security.web.DefaultSecurityFilterChain#0' while setting bean property 'sourceList' with key [0]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.web.DefaultSecurityFilterChain#0': Cannot resolve reference to bean 'authenticationFilter' while setting constructor argument with key [2]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'authenticationFilter' defined in ServletContext resource [/WEB-INF/spring-security.xml]: Cannot resolve reference to bean 'customAuthenticationManager' while setting bean property 'authenticationManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customAuthenticationManager': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.myweb.webservices.service.UserService com.myweb.webservices.authentication.CustomAuthenticationManager.userService; 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: com.myweb.webservices.common.dao.GenericDao com.myweb.webservices.common.dao.AbstractGenericServiceImpl.genericDao; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [com.myweb.webservices.common.dao.GenericDao] is defined: expected single matching bean but found 2: testDao,userDao
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:329)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:107)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:353)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:154)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1387)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1128)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:608)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:249)
at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:307)
at com.google.appengine.tools.development.AutomaticServerInstanceHolder.startUp(AutomaticServerInstanceHolder.java:26)
at com.google.appengine.tools.development.AbstractServer.startup(AbstractServer.java:80)
at com.google.appengine.tools.development.Servers.startup(Servers.java:82)
at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:237)
at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:339)
at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
at com.google.appengine.tools.development.DevAppServerMain.<init>(DevAppServerMain.java:274)
at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:250)

score 4 · Accepted Answer

エラーは

No qualifying bean of type [com.myweb.webservices.common.dao.GenericDao] is defined: expected single matching bean but found 2: testDao,userDao

コンポーネントがスキャンされたパッケージのどこかに、UserDaoとの両方を作成していTestDaoます。どちらもの実装であるため、どちらをターゲットGenericDaoとして使用するかで衝突しています。私はあなたがこの文脈@Autowiredであなたを取り除くべきだと信じています.TestDao

残りの構成を表示せずに、ルートコンテキストでこれを行います

<context:component-scan base-package="com.myweb.webservices" />

これはサーブレットコンテキストで

<context:component-scan base-package="com.myweb.webservices."/>
<context:component-scan base-package="com.myweb.webservices.dao"/>
<context:component-scan base-package="com.myweb.webservices.service"/>
<context:component-scan base-package="com.myweb.webservices.controller"/>

重複した Bean が作成され、より多くの問題が発生する可能性が高くなります。コンポーネントスキャンをできるだけ具体的にします。コンポーネントのスキャンは、パッケージ全体で再帰的です。

この豆

<bean id="cnManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
...

サーブレットにのみ関連します。ルートコンテキストではなく、サーブレットコンテキストにある必要があります。

サーブレットのコンテキストでは、有効にすることを忘れないでください

<mvc:annotation-driven />

spring-mvc - NoUniqueBeanDefinitionException: タイプの適格な Bean が定義されていません: 単一の一致する Bean が予想されますが、2 が見つかりました

1 に答える 1

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