使用spring jpa出错

[billni]

org.springframework.dao.InvalidDataAccessApiUsageException: interface org.springframework.orm.jpa.EntityManagerProxy is not visible from class loader; nested exception is java.lang.IllegalArgumentException: interface org.springframework.orm.jpa.EntityManagerProxy is not visible from class loader
at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:269)
at org.springframework.orm.jpa.DefaultJpaDialect.translateExceptionIfPossible(DefaultJpaDialect.java:120)
at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:212)
at org.springframework.orm.jpa.JpaAccessor.translateIfNecessary(JpaAccessor.java:152)
at org.springframework.orm.jpa.JpaTemplate.execute(JpaTemplate.java:190)
at org.springframework.orm.jpa.JpaTemplate.executeFind(JpaTemplate.java:152)
at org.springframework.orm.jpa.JpaTemplate.find(JpaTemplate.java:299)
at com.ibm.dw.spring2.dao.EmployeeDAO.findByEmployeeLastName(EmployeeDAO.java:29)
at test.ibm.dw.spring2.test.EmployeeServiceIntegrationTest.testModifyEmployee(EmployeeServiceIntegrationTest.java:47)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:69)
at org.springframework.test.annotation.AbstractAnnotationAwareTransactionalTests.access$001(AbstractAnnotationAwareTransactionalTests.java:47)
at org.springframework.test.annotation.AbstractAnnotationAwareTransactionalTests$1.run(AbstractAnnotationAwareTransactionalTests.java:115)
at org.springframework.test.annotation.AbstractAnnotationAwareTransactionalTests.runTest(AbstractAnnotationAwareTransactionalTests.java:180)
at org.springframework.test.annotation.AbstractAnnotationAwareTransactionalTests.runTestTimed(AbstractAnnotationAwareTransactionalTests.java:153)
at org.springframework.test.annotation.AbstractAnnotationAwareTransactionalTests.runBare(AbstractAnnotationAwareTransactionalTests.java:111)
at org.springframework.test.jpa.AbstractJpaTests.runBare(AbstractJpaTests.java:174)
at org.springframework.test.jpa.AbstractJpaTests.runBare(AbstractJpaTests.java:254)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:128)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.lang.IllegalArgumentException: interface org.springframework.orm.jpa.EntityManagerProxy is not visible from class loader
at java.lang.reflect.Proxy.getProxyClass(Proxy.java:353)
at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:581)
at org.springframework.orm.jpa.JpaTemplate.createEntityManagerProxy(JpaTemplate.java:211)
at org.springframework.orm.jpa.JpaTemplate.execute(JpaTemplate.java:184)
... 30 more

[勇往直前的胖子]

把applicationContext.xml文件里关于entityManagerFactory的配置部分贴出来看看

<!-- 数据持久层管理器 -->
	<bean
		class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

	<bean id="entityManagerFactory"
		class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
		<property name="persistenceUnitName" value="englishadminPU" />
		<property name="jpaVendorAdapter">
			<bean
				class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
				<property name="database" value="SQL_SERVER" />
				<property name="showSql" value="true" />
			</bean>
		</property>
	</bean>
	<bean id="transactionManager"
		class="org.springframework.orm.jpa.JpaTransactionManager">
		<property name="entityManagerFactory"
			ref="entityManagerFactory" />
	</bean>
	<tx:annotation-driven transaction-manager="transactionManager" />

我是这样配的，用的是Hibernate的JPA实现，数据库连接参数在persistence.xml里

[yibunengjing]

造成这个的原因是你tomcat或者其他容器的 class loader不支持org.springframework.orm.jpa.EntityManagerProxy

解决方法是去把spring-tomcat-weaver.jar这个jar包放到tomcat/common/lib下
这个jar包在spring的工程项目中可以找到

[billni]

经过测试,最终确认是jar包,版本冲突造成的,同样谢谢zrzlj和yibunengjing .