未定义 [javax.persistence.EntityManagerFactory] ​​类型的唯一 bean：预期为单个 bean，但发现 0

Question

有人可以告诉我我的配置有什么问题吗？我太沮丧了，为此我已经失去了头发。欢迎任何指点。 感谢

Persistence.xml

    <?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
    <persistence-unit name="myPersistenceUnit" transaction-type="JTA">
        <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>             
        <jta-data-source>jdbc/oracle</jta-data-source>              
        <class>com.myproject.domain.UserAccount</class>

        <properties>
            <property name="eclipselink.logging.level" value="FINE"/>                       
            <property name="eclipselink.jdbc.batch-writing" value="JDBC" />
            <property name="eclipselink.target-database" value="Oracle10g"/>
            <property name="eclipselink.cache.type.default" value="NONE"/>

            <!--Integrate EclipseLink with JTA in Glassfish-->
            <property name="eclipselink.target-server" value="SunAS9"/>

            <property name="eclipselink.cache.size.default" value="0"/>
            <property name="eclipselink.cache.shared.default" value="false"/>

        </properties>   

    </persistence-unit>

</persistence>

Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    id="WebApp_ID" version="3.0">

    <display-name>MyProject</display-name>

    <persistence-unit-ref>
        <persistence-unit-ref-name>persistence/myPersistenceUnit</persistence-unit-ref-name>
        <persistence-unit-name>myPersistenceUnit</persistence-unit-name>
    </persistence-unit-ref>

    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>      

    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>*.htm</url-pattern>
    </servlet-mapping>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>
    </context-param>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

</web-app>

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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:jee="http://www.springframework.org/schema/jee"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/jee 
http://www.springframework.org/schema/jee/spring-jee.xsd" default-autowire="byName">



    <tx:annotation-driven/>         
    <tx:jta-transaction-manager/>

    <jee:jndi-lookup id="entityManagerFactory" jndi-name="persistence/myPersistenceUnit"/>  


    <bean class="org.springframework.beans.factory.annotation.RequiredAnnotationBeanPostProcessor"/>    
     <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>

    <!-- enables interpretation of the @PersistenceUnit/@PersistenceContext annotations providing convenient  
       access to EntityManagerFactory/EntityManager -->         
    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>


</beans>

mvc-dispatcher-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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">

<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->

    <tx:annotation-driven />
    <tx:jta-transaction-manager />
    <context:component-scan base-package="com.myProject" />
    <context:annotation-config />

    <!-- Enables the Spring MVC @Controller programming model -->
    <mvc:annotation-driven />
    <mvc:default-servlet-handler />


    <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

    <!-- Location Tiles config -->
    <bean id="tilesConfigurer" 
    class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">     
         <property name="definitions">
            <list>
                <value>/WEB-INF/tiles-defs.xml</value>
            </list>
         </property>
    </bean>

    <!-- Resolves views selected for rendering by Tiles -->
    <bean id="tilesViewResolver"
          class="org.springframework.web.servlet.view.UrlBasedViewResolver"
          p:viewClass="org.springframework.web.servlet.view.tiles2.TilesView" />

    <!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix">
            <value>/WEB-INF/pages/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>

    <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <property name="basename" value="/WEB-INF/messages" />
        <property name="cacheSeconds" value="0"/>
    </bean>

    <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" />

</beans>

UserAccountDAO。 java

@Repository
public class UserAccountDAO implements IUserAccountDAO {

    private EntityManager entityManager;

    @PersistenceContext
    public void setEntityManager(EntityManager entityManager) {
        this.entityManager = entityManager;
    }

    @Override
    @Transactional(readOnly = true, propagation = Propagation.REQUIRED)
    public UserAccount checkLogin(String userName, String pwd) {        
        //* Find the user in the DB             
        Query queryUserAccount = entityManager.createQuery("select u from UserAccount u where (u.username = :userName) and (u.password = :pwd)");
.......
    }

}

loginController.java

@Controller
@SessionAttributes({"userAccount"})
public class LoginLogOutController  {

    private static final Logger logger = LoggerFactory.getLogger(UserAccount.class);

    @Resource
    private UserAccountDAO userDAO; 

    @RequestMapping(value="/loginForm.htm", method = RequestMethod.GET)
   public String showloginForm(Map model) {         
        logger.debug("Get login form"); 
        UserAccount userAccount = new UserAccount();                        
        model.put("userAccount", userAccount);
        return "loginform";
    }
...

错误堆栈

INFO: 13:52:21,657 ERROR ContextLoader:220 - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loginController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userAccountDAO': Injection of persistence dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [javax.persistence.EntityManagerFactory] is defined: expected single bean but found 0
    at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:300)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
    at org.apache.catalina.core.StandardContext.contextListenerStart(StandardContext.java:4664)
    at com.sun.enterprise.web.WebModule.contextListenerStart(WebModule.java:535)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:5266)
    at com.sun.enterprise.web.WebModule.start(WebModule.java:499)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:928)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:912)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:694)
    at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1947)
    at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1619)
    at com.sun.enterprise.web.WebApplication.start(WebApplication.java:90)
    at org.glassfish.internal.data.EngineRef.start(EngineRef.java:126)
    at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:241)
    at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:236)
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:339)
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:183)
    at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:272)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:305)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:320)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1176)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$900(CommandRunnerImpl.java:83)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1224)
    at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:365)
    at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:204)
    at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:166)
    at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:100)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:245)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
    at java.lang.Thread.run(Thread.java:732)

Answer 1

我的猜测是

你不需要告诉 spring 这个实现了什么接口吗？或者也许不是。看看我自己的代码，我不后悔......

Answer 2

尝试注入对 ApplicationContext 的引用。并按名称查找实体管理器。确保它实现了您期望的接口。可能是类加载器不匹配？

Answer 3

我是 Spring 框架配置的新手，但试图帮助网站上的另一位同事，我找到了下面的 Spring+JPA 教程（由 google 从 pt-br 翻译而来）。我发现它确实很清晰，主要是因为它试图解释同时使用这两种技术时的良好实践：

http://translate.google.com.br/translate?hl=en&sl=pt&tl=en&u=http%3A%2F%2Ffabiolnm.blogspot.com%2F2009%2F11% 2Fintegracao-spring-x-jpa.html

希望有帮助！

Answer 4

您是否尝试过使用不同的 jndi-name 路径？我在其他地方看到过这种表示法：

<jee:jndi-lookup expected-type="javax.persistence.EntityManagerFactory" "entityManagerFactory"
    jndi-name="java:comp/env/persistence/myPersistenceUnit"></jee:jndi-lookup>

似乎某些类需要 jndi 名称的标准查找路径