Hibernate问题java.lang.Boolean不能转换为java.lang.String使用JDK 1.7

问题描述

我正面临着Hibernate的问题。

使用Hibernate 3.2.6和JDK 1.7.0_21

这个问题是由于JDK与Hibernate版本兼容？

这个问题是随机的。我仍然无法找到重现的步骤。

  
 
 
 Hibernate 3  BasicPropertyAccessor.getterMethod（...）有些时候发现 getProperty（）由于JDK 7中的未指定顺序由 getDeclaredMethods（）和某些时间 isProperty（） 。它混淆了hibernate，它为String类型属性调用布尔类型方法。
 
 
您需要重命名一个方法才能获得预期的结果。
 
 
 
关于Hibernate论坛的类似问题： 
 
I am facing issue with Hibernate. 

Using Hibernate 3.2.6 and JDK 1.7.0_21

Is this issue coming due to JDK compatibility with Hibernate version?

This issue is random. I still unable to find steps to reproduce. 
2014-07-14 06:09:10,661 [DEBUG] EventExpenseAreaService.getEventSummary:654 - Revenue Value (Hari) --> 1166.15
2014-07-14 06:09:18,665 [ERROR] EventSetupService.getEventById:1451 - java.lang.Boolean cannot be cast to java.lang.String
java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
    at org.hibernate.type.StringType.toString(StringType.java:44)
    at org.hibernate.type.NullableType.nullSafeToString(NullableType.java:93)
    at org.hibernate.type.NullableType.nullSafeSet(NullableType.java:140)
    at org.hibernate.type.NullableType.nullSafeSet(NullableType.java:107)
    at org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2002)
    at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2376)
    at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2312)
    at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2612)
    at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:96)
    at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:168)
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
    at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
    at com.sibisoft.northstar.events.service.EventSetupService.getEventById(EventSetupService.java:1441)
    at com.sibisoft.northstar.events.struts.EventAction.load(EventAction.java:1037)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
Code getEventById
public EventDTO getEventById(Integer eventId,boolean logActivity, Session session)throws Exception {

    EventDTO event = null;
    Transaction transaction = null;
    try {

        if (session == null) {
            session = HibernateSessionFactory.getSession();
            if(logActivity){
                transaction = session.beginTransaction();
            }
        }

        event = (EventDTO) super.getByPrimaryKey(EventDTO.class, eventId,session);


        if(transaction!=null){
            transaction.commit();
        }

    } catch (HibernateException e) {
        LOGGER.error(e.getMessage(), e);
        if(transaction!=null){
            transaction.rollback();
        }
        throw e;
    }catch (Exception e) {
        LOGGER.error(e.getMessage(), e);
        if(transaction!=null){
            transaction.rollback();
        }
        throw e;
    }

    return event;

}
Method : getByPrimaryKey
protected BaseEventDTO getByPrimaryKey(Class clazz, Integer pk,Session session) throws Exception{

    BaseEventDTO dto = null;
    Transaction tx = null;

    try {

        if (session == null)  {
            session = HibernateSessionFactory.getSession();
        }
        dto = (BaseEventDTO) session.get(clazz, pk);
        return dto;

    }
    catch(Exception e){
        LOGGER.error(e);
        if (tx !=null) {
            tx.rollback();
        }
        throw e;
    }
}
 解决方案 
JDK 7 have changed Class.getDeclaredMethods() so the order is not guaranteed. [click here]
You might have a property in Object mapping that have getter method String getProperty() as well as Boolean isPropery() that is causing problem intermittently. 
Hibernate 3 BasicPropertyAccessor.getterMethod(...) some time finds getProperty() and some time isProperty() due to unspecified ordering in JDK 7 by getDeclaredMethods(). which confuses hibernate and it invokes Boolean Type method for String type property.
You need to rename one method to get expected results.
Similar question on Hibernate Forum: https://forum.hibernate.org/viewtopic.php?p=2474641
                        
这篇关于Hibernate问题java.lang.Boolean不能转换为java.lang.String使用JDK 1.7的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！