我正在尝试更新MySql Db中的记录。在更新时引发以下异常

org.hibernate.HibernateException: Illegal attempt to associate a collection with two open sessions
at org.hibernate.collection.AbstractPersistentCollection.setCurrentSession(AbstractPersistentCollection.java:410)
at org.hibernate.event.def.OnUpdateVisitor.processCollection(OnUpdateVisitor.java:43)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:101)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:61)
at org.hibernate.event.def.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:55)
at org.hibernate.event.def.AbstractVisitor.process(AbstractVisitor.java:123)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:293)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:223)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:89)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:507)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:499)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:495)
at com.tcs.ignite.ih.spring.dao.UserDAOImpl.saveUpdateUserbean(UserDAOImpl.java:185)
at com.tcs.ignite.ih.spring.dao.UserDAOImpl.blockuser(UserDAOImpl.java:204)
at com.tcs.ignite.ih.spring.service.UserServiceImpl.blockUser(UserServiceImpl.java:187)
at com.tcs.ignite.ih.spring.controller.AdminHomeController.BlockUser(AdminHomeController.java:48)

我检查 session 。它在每种方法的Final块中关闭。无法找出问题所在。我能够用其他方法插入更新操作,没有任何问题,但是只有saveUpdateUserBean方法会引发异常

UserDAOImpl:
import com.tcs.ignite.ih.hibernate.model.Userdetails;
import com.tcs.ignite.ih.hibernate.model.Userlog;
import com.tcs.ignite.ih.hibernate.model.Userrole;
import com.tcs.ignite.ih.spring.bean.LoginBean;
import com.tcs.ignite.ih.spring.util.LogFile;
import java.util.List;
import org.hibernate.Hibernate;
import org.hibernate.SQLQuery;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;


@Repository
@Transactional
public class UserDAOImpl implements UserDAO {

@Autowired
private SessionFactory sessionFactory;

public SessionFactory getSessionFactory() {
    return sessionFactory;
}

public void setSessionFactory(SessionFactory sessionFactory) {
    this.sessionFactory = sessionFactory;
}


@Override
public Userdetails getUserDetails(String username) {
    Session session = getSessionFactory().openSession();
    Userdetails u = null;
    try {
        u = (Userdetails) getSessionFactory().openSession()
                .createCriteria(Userdetails.class)
                .add(Restrictions.eq("email", username)).uniqueResult();
    } catch (Exception e) {
        LogFile.log.error("UserDAO getuserDetails(): " + e.toString());
    } finally {
        if (session.isOpen()) {
            session.close();
        }
        return u;
    }
}

@Override
public boolean saveUpdateUserbean(Userdetails u) {

    Session session = getSessionFactory().openSession();
    Transaction tr = session.beginTransaction();
    boolean y = false;
    try {
        session.saveOrUpdate(u);
        tr.commit();
        y = true;
    } catch (Exception e) {
        tr.rollback();
        e.printStackTrace();
    } finally {
        if (session.isOpen()) {
            session.close();
        }
        return y;
    }
}

@Override
public boolean blockuser(String email) {
    Userdetails u = this.getUserDetails(email);
    return this.saveUpdateUserbean(u);
}
}

ServiceImpl:
    import com.tcs.ignite.ih.hibernate.model.Userdetails;
import com.tcs.ignite.ih.hibernate.model.Userlog;
import com.tcs.ignite.ih.spring.bean.LogBean;
import com.tcs.ignite.ih.spring.bean.RegisterBean;
import com.tcs.ignite.ih.spring.bean.UserBean;
import com.tcs.ignite.ih.spring.bean.loadUserBean;
import com.tcs.ignite.ih.spring.dao.UserDAO;
import com.tcs.ignite.ih.spring.util.Time;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class UserServiceImpl implements UserService {

@Autowired
UserDAO dao;

@Override
public boolean blockUser(String email) {
   return dao.blockuser(email);
}
}

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"
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
   http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
   http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">

<bean id="propertyConfigurer"
      class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
      p:location="classpath:jdbc.properties" />

<bean id="dataSource"
      class="org.springframework.jdbc.datasource.DriverManagerDataSource"
      p:driverClassName="${jdbc.driverClassName}"
      p:url="${jdbc.url}"
      p:username="${jdbc.username}"
      p:password="${jdbc.password}"/>

<!-- ADD PERSISTENCE SUPPORT HERE (jpa, hibernate, etc) -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="packagesToScan" value="com.tcs.ignite.ih.hibernate.model" />
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
        </props>
    </property>
</bean>

<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory"/>
</bean>
<tx:annotation-driven />
</beans>

我能够使用相同的配置执行所有数据库操作,但是当我从serviceImpl调用其调用DAO方法的blockuser()方法并且saveupdateUserBean抛出上述异常时?我想念什么吗?

最佳答案

hibernate manual says:



就我而言,这很有帮助。
道:

public void updateUser(User user) throws UserException {
        sessionFactory.getCurrentSession().merge(user);
    }

POJO广告(一个用户有很多广告):
@OneToMany(mappedBy = "oUser", fetch = FetchType.LAZY)
public List<Ad> getAoAdList() {
    return aoAdList;
}

07-24 12:47