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我的工作在春季和休眠，我得到这个以下异常对此我无法调试无法获取EntityManager的实例？
下面是错误堆栈跟踪：
SLF4J：无法加载类“org.slf4j.impl.StaticLoggerBinder ”。 SLF4J：默认为无操作（NOP）记录器实现 SLF4J：有关详细信息，请参阅http://www.slf4j.org/codes.html#StaticLoggerBinder。 2014年10月2日下午7时07分13秒
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry destroySingletons
INFO: Destroying singletons in org.s[email protected]1712b3a: defining beans [studentDAOImpl,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,entityManagerFactory,jpaDialect,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,transactionManager,studentDAO,student,org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0]; root of factory hierarchy
Oct 2, 2014 7:07:13 PM org.springframework.orm.jpa.AbstractEntityManagerFactoryBean destroy
INFO: Closing JPA EntityManagerFactory for persistence unit 'SHPersistenceUnit'
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'studentDAO' defined in class path resource [SpringBeans.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type '$Proxy10 implementing org.hibernate.ejb.HibernateEntityManagerFactory,org.springframework.orm.jpa.EntityManagerFactoryInfo' to required type 'javax.persistence.EntityManager' for property 'entityManager'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [$Proxy10 implementing org.hibernate.ejb.HibernateEntityManagerFactory,org.springframework.orm.jpa.EntityManagerFactoryInfo] to required type [javax.persistence.EntityManager] for property 'entityManager': no matching editors or conversion strategy found
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$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at com.sh.main.Main.main(Main.java:21)
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type '$Proxy10 implementing org.hibernate.ejb.HibernateEntityManagerFactory,org.springframework.orm.jpa.EntityManagerFactoryInfo' to required type 'javax.persistence.EntityManager' for property 'entityManager'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [$Proxy10 implementing org.hibernate.ejb.HibernateEntityManagerFactory,org.springframework.orm.jpa.EntityManagerFactoryInfo] to required type [javax.persistence.EntityManager] for property 'entityManager': no matching editors or conversion strategy found
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:485)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:516)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:510)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1406)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1365)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
... 11 more
Caused by: java.lang.IllegalStateException: Cannot convert value of type [$Proxy10 implementing org.hibernate.ejb.HibernateEntityManagerFactory,org.springframework.orm.jpa.EntityManagerFactoryInfo] to required type [javax.persistence.EntityManager] for property 'entityManager': no matching editors or conversion strategy found
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:241)
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:470)
... 17 more
下面是我的代码片断：
的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="SHPersistenceUnit"
transaction-type="RESOURCE_LOCAL">
<class>com.sh.model.Student</class>
<properties>
<property name="hibernate.connection.driver_class" value="oracle.jdbc.driver.OracleDriver" />
<property name="hibernate.connection.username" value="VIBHU" />
<property name="hibernate.connection.password" value="vibhu" />
<property name="hibernate.connection.url" value="jdbc:oracle:thin:@localhost:1521:XE" />
<property name="hibernate.dialect" value="org.hibernate.dialect.OracleDialect" />
<property name="hbm2ddl.auto" value="update" />
<property name="show_sql" value="true" />
</properties>
</persistence-unit>
</persistence>
下面是我的弹簧配置文件[SpringBeans.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: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">
<context:component-scan base-package="com.sh"></context:component-scan>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceXmlLocation" value="classpath*:META-INF/persistence.xml"></property>
<property name="persistenceUnitName" value="SHPersistenceUnit"></property>
<!-- <property name="jpaVendorAdapter" ref="jpaVendorAdapter"></property> -->
<property name="persistenceProviderClass" value="org.hibernate.ejb.HibernatePersistence"/>
<property name="jpaDialect" ref="jpaDialect"></property>
</bean>
<!-- <bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="database" value="ORACLE"></property>
<property name="databasePlatform" value="org.hibernate.dialect.OracleDialect"></property>
</bean> -->
<bean id="jpaDialect" class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"></bean>
<tx:annotation-driven />
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"></property>
</bean>
<bean id="studentDAO" class="com.sh.dao.impl.StudentDAOImpl">
<property name="entityManager" ref="entityManagerFactory"></property>
</bean>
<bean id="student" class="com.sh.model.Student"></bean>
</beans>
我的StudentDAOImpl类将实现StudentDAO接口将有像
StudentDAO interface
public void saveStudent(final Student student);
public List<Student> getAllStudents();
public void update(final Student student);
StudentDAOImpl Class
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import org.hibernate.Session;
import org.springframework.stereotype.Repository;
import com.sh.dao.StudentDAO;
import com.sh.model.Student;
@Repository
public class StudentDAOImpl implements StudentDAO {
@PersistenceContext
private EntityManager entityManager;
public Session getSessionObj() {
return (Session)entityManager.getDelegate();
}
@Override
public void saveStudent(final Student student) {
// TODO Auto-generated method stub
System.out.println("saving object state to DB");
entityManager.persist(student);
entityManager.getTransaction().commit();
System.out.println("saved successfully");
}
@Override
public List<Student> getAllStudents() {
// TODO Auto-generated method stub
System.out.println("retrieving all student details from DB");
List list = null;
String hql = "from Student as student";
Query query = entityManager.createNamedQuery(hql);
list = query.getResultList();
System.out.println("list size from getAllStudents "+list.size());
return list;
}
@Override
public void update(final Student student) {
// TODO Auto-generated method stub
System.out.println("updating student object to DB");
Session session = getSessionObj();
session.beginTransaction();
session.update(student);
session.getTransaction().commit();
System.out.println("updated successfully");
}
public void setEntityManager(EntityManager entityManager) {
this.entityManager = entityManager;
}
}
方法最后主类
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("main method ");
AbstractApplicationContext abstractApplicationContext = new ClassPathXmlApplicationContext("SpringBeans.xml");
System.out.println("next");
Student stud = abstractApplicationContext.getBean("student", Student.class);
stud.setStudentName("Alan");
StudentDAOImpl studentDAOImpl = abstractApplicationContext.getBean("studentDAO", StudentDAOImpl.class);
studentDAOImpl.saveStudent(stud);
List list = studentDAOImpl.getAllStudents();
if(list!= null && list.size()>0) {
Iterator itr = list.iterator();
while(itr.hasNext()) {
Student student = (Student)itr.next();
System.out.println(student.getId()+"\t"+student.getStudentName());
}
}
}
请尽量帮助我。
任何答案都高度赞赏
现在它的工作庇护所。非常感谢。 – VSK 2014-10-03 09:30:08