Spring + JPA + MVC - 創建bean時出錯

Question

我在eclipse中開發了一個Spring JPA項目，它訪問存儲在mysql服務器中的數據。現在我需要在Spring @ MVC項目中導入這個項目。所以

• 我在JPA項目的構建路徑配置導出Maven依賴
• 我添加項目到Tomcat引導類路徑，
• 我加入了JPA/Spring項目到類路徑我的Spring @MVC項目
• 我還將jpa應用程序上下文添加到MVC項目的根上下文中。

當我嘗試運行在tomcat服務器上的應用程序，我得到一個錯誤。看來我缺少了spring-beans庫，但正如你在pom配置中看到的那樣，我導入了它。以下是錯誤日誌：

INFO: Initializing Spring root WebApplicationContext 
INFO : org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization started 
INFO : org.springframework.web.context.support.XmlWebApplicationContext - Refreshing Root WebApplicationContext: startup date [Mon Feb 06 22:26:12 CET 2012]; root of context hierarchy 
INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from ServletContext resource [/WEB-INF/spring/root-context.xml] 
INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [META-INF/spring/app-context.xml] 
INFO : org.springframework.context.annotation.ClassPathBeanDefinitionScanner - JSR-330 'javax.inject.Named' annotation found and supported for component scanning 
INFO : org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor - JSR-330 'javax.inject.Inject' annotation found and supported for autowiring 
INFO : org.springframework.beans.factory.support.DefaultListableBeanFactory - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1d382926: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.interceptor.TransactionAttributeSourceAdvisor#0,org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor#0,org.springframework.transaction.interceptor.TransactionAttributeSourceAdvisor#1,org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0,entityManagerFactory,dataSource,transactionManager,jpaDaoRole,jpaDaoUser,homeController]; root of factory hierarchy 
ERROR: org.springframework.web.context.ContextLoader - Context initialization failed 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0' defined in class path resource [META-INF/spring/app-context.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [META-INF/spring/app-context.xml]: Initialization of bean failed; nested exception is java.lang.NoSuchFieldError: NULL 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 
    at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:710) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:410) 
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:282) 
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:204) 
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) 
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206) 
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705) 
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) 
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:840) 
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) 
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463) 
    at org.apache.catalina.core.StandardService.start(StandardService.java:525) 
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:754) 
    at org.apache.catalina.startup.Catalina.start(Catalina.java:595) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
    at java.lang.reflect.Method.invoke(Unknown Source) 
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) 
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [META-INF/spring/app-context.xml]: Initialization of bean failed; nested exception is java.lang.NoSuchFieldError: NULL 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:400) 
    at org.springframework.beans.factory.BeanFactoryUtils.beansOfTypeIncludingAncestors(BeanFactoryUtils.java:275) 
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.detectPersistenceExceptionTranslators(PersistenceExceptionTranslationInterceptor.java:122) 
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.<init>(PersistenceExceptionTranslationInterceptor.java:78) 
    at org.springframework.dao.annotation.PersistenceExceptionTranslationAdvisor.<init>(PersistenceExceptionTranslationAdvisor.java:70) 
    at org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor.setBeanFactory(PersistenceExceptionTranslationPostProcessor.java:96) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods(AbstractAutowireCapableBeanFactory.java:1475) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1443) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) 
    ... 25 more 
Caused by: java.lang.NoSuchFieldError: NULL 
    at org.springframework.expression.TypedValue.<clinit>(TypedValue.java:32) 
    at org.springframework.expression.spel.support.StandardEvaluationContext.setRootObject(StandardEvaluationContext.java:85) 
    at org.springframework.expression.spel.support.StandardEvaluationContext.<init>(StandardEvaluationContext.java:74) 
    at org.springframework.context.expression.StandardBeanExpressionResolver.evaluate(StandardBeanExpressionResolver.java:124) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.evaluateBeanDefinitionString(AbstractBeanFactory.java:1299) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.evaluate(BeanDefinitionValueResolver.java:224) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:311) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1360) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) 
    ... 39 more 

這裏是我的應用程序上下文：

<dependencies> 
    <dependency> 
     <groupId>org.hibernate</groupId> 
     <artifactId>hibernate-entitymanager</artifactId> 
     <version>3.6.0.Final</version> 
    </dependency> 
    <dependency> 
     <groupId>javax.validation</groupId> 
     <artifactId>validation-api</artifactId> 
     <version>1.0.0.GA</version> 
    </dependency> 
    <dependency> 
     <groupId>org.hibernate</groupId> 
     <artifactId>hibernate-validator</artifactId> 
     <version>4.1.0.Final</version> 
    </dependency> 

    <dependency> 
     <groupId>junit</groupId> 
     <artifactId>junit</artifactId> 
     <version>4.7</version> 
     <scope>test</scope> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-test</artifactId> 
     <version>${spring.framework.version}</version> 
     <scope>test</scope> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-context-support</artifactId> 
     <version>${spring.framework.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-aop</artifactId> 
     <version>${spring.framework.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-orm</artifactId> 
     <version>${spring.framework.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>commons-dbcp</groupId> 
     <artifactId>commons-dbcp</artifactId> 
     <version>1.2.2</version> 
    </dependency>  
    <dependency> 
     <groupId>log4j</groupId> 
     <artifactId>log4j</artifactId> 
     <version>1.2.16</version> 
    </dependency> 
    <dependency> 
     <groupId>org.slf4j</groupId> 
     <artifactId>slf4j-log4j12</artifactId> 
     <version>1.6.4</version> 
    </dependency> 
    <dependency> 
     <groupId>mysql</groupId> 
     <artifactId>mysql-connector-java</artifactId> 
     <version>5.1.18</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-aspects</artifactId> 
     <version>3.1.0.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.slf4j</groupId> 
     <artifactId>slf4j-api</artifactId> 
     <version>1.6.4</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-jdbc</artifactId> 
     <version>3.1.0.RELEASE</version> 
    </dependency> 
</dependencies> 

這裏是JPA項目的我的應用程序上下文：

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

    <description>Example configuration to get you started.</description> 

    <!-- Generic --> 
    <context:annotation-config /> 
    <tx:annotation-driven transaction-manager="transactionManager" /> 

    <!-- JPA --> 

    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> 
    <tx:annotation-driven /> 
    <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/> 
    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
     <property name="dataSource" ref="dataSource" /> 
     <property name="jpaVendorAdapter"> 
      <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
       <property name="showSql" value="true" /> <!-- Prints used SQL to stdout --> 
       <property name="generateDdl" value="true" /> <!-- Generates tables. --> 
       <property name="databasePlatform" value="org.hibernate.dialect.MySQL5Dialect" /> 
      </bean> 
     </property> 
    </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/windydb"/> 
     <property name="username" value="windyuser"/> 
     <property name="password" value="maverick1984"/> 
    </bean> 
    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> 
     <property name="entityManagerFactory" ref="entityManagerFactory"/> 
     <property name="dataSource" ref="dataSource"/> 
    </bean> 
    <context:component-scan base-package="com.windy.spring" /> 

</beans> 

預先感謝您幫助

達尼洛

Answer 1

只的依賴：

<dependency> 
    <groupId>org.springframework</groupId> 
    <artifactId>spring-aspects</artifactId> 
    <version>3.1.0.RELEASE</version> 
    </dependency> 

    <dependency> 
    <groupId>org.springframework</groupId> 
    <artifactId>spring-jdbc</artifactId> 
    <version>3.1.0.RELEASE</version> 
    </dependency> 

做這些（3.1.0.RELEASE）的版本相匹配的Maven變量$ {} spring.framework.version。據我所知可能會導致版本不匹配，並可能導致通常由不匹配版本引起的無此類字段錯誤。

Answer 2

這確實通常是由某個版本的版本不匹配造成的。驗證所有的彈簧罐版本。也許升級你的JPA提供程序，如果它仍然無法正常工作。

Answer 3

我有同樣的問題，事實證明確實有一個版本不匹配，我的問題是，我用$ {server.env}的形式服務器變量，這是這樣的提出了這個問題。由於我的spring-expression版本仍然是3.0.5。你應該嘗試添加這些到您的POM：

 <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-expression</artifactId> 
      <version>${version.spring.framework}</version> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-beans</artifactId> 
      <version>${version.spring.framework}</version> 
     </dependency>   

Answer 4

在我的情況下，衝突是由春天的安全性，但仍使用舊版本引起的。 我把一些排除在它上面，現在沒關係。 把這些東西放在dependencyManagement中也是一件好事，所以你不必在每個模塊中重複一遍。

我使用了以下內容：

<dependencyManagement> 
    <dependencies> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-context-support</artifactId> 
      <version>${spring.framework.version}</version> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-orm</artifactId> 
      <version>${spring.framework.version}</version> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-web</artifactId> 
      <version>${spring.framework.version}</version> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework.security</groupId> 
      <artifactId>spring-security-core</artifactId> 
      <version>${spring.security.framework.version}</version> 

      <exclusions> 
       <exclusion> 
        <groupId>org.springframework</groupId> 
        <artifactId>spring-aop</artifactId> 
       </exclusion> 

       <exclusion> 
        <groupId>org.springframework</groupId> 
        <artifactId>spring-expression</artifactId> 
       </exclusion> 
      </exclusions> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework.security</groupId> 
      <artifactId>spring-security-config</artifactId> 
      <version>${spring.security.framework.version}</version> 

      <exclusions> 
       <exclusion> 
        <groupId>org.springframework</groupId> 
        <artifactId>spring-aop</artifactId> 
       </exclusion> 
      </exclusions> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework.security</groupId> 
      <artifactId>spring-security-web</artifactId> 
      <version>${spring.security.framework.version}</version> 
      <exclusions> 
       <exclusion> 
        <groupId>org.springframework</groupId> 
        <artifactId>spring-tx</artifactId> 
       </exclusion> 

       <exclusion> 
        <groupId>org.springframework</groupId> 
        <artifactId>spring-jdbc</artifactId> 
       </exclusion> 

       <exclusion> 
        <groupId>org.springframework</groupId> 
        <artifactId>spring-aop</artifactId> 
       </exclusion> 

       <exclusion> 
        <groupId>org.springframework</groupId> 
        <artifactId>spring-expression</artifactId> 
       </exclusion> 
      </exclusions> 
     </dependency> 


     <dependency> 
      <groupId>org.hibernate.javax.persistence</groupId> 
      <artifactId>hibernate-jpa-2.0-api</artifactId> 
      <version>1.0.1.Final</version> 
     </dependency> 

     <dependency> 
      <groupId>org.hibernate</groupId> 
      <artifactId>hibernate-entitymanager</artifactId> 
      <version>4.0.1.Final</version> 
     </dependency> 
    </dependencies> 
</dependencyManagement> 

不排除我有同樣的錯誤在該線程的開頭描述。 我用春天的版本是：

<properties> 
    <spring.framework.version>3.1.1.RELEASE</spring.framework.version> 
    <spring.security.framework.version>3.1.0.RELEASE</spring.security.framework.version> 
</properties>