hibernate

最新推荐文章于 2024-08-12 23:08:35 发布

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本文详细解析了在使用Hibernate框架时遇到的经典错误：不同对象带有相同标识符值已关联到会话。提供了通过调用getHibernateTemplate().merge()方法在DAO实现层解决此问题的有效策略。

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解决a different object with the same identifier value was already associated with the session错误

org.springframework.orm.hibernate3.HibernateSystemException: a different object with the same identifier value was already associated with the session: [com.xshcar.carcloud.entity.UboxTbl#1291]; nested exception is org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.xshcar.carcloud.entity.UboxTbl#1291]

一个经典的hibernate错误:a different object with the same identifier value was already associated with the session xxxx
hibernate3.0以上使用merge()来合并两个session中的同一对象

解决:

在daoimpl层调用hibernate的getHibernateTemplate().merge(对象)方法;

public boolean executeUpdate(T t) {
        boolean b=true;
        try {
       t=(T)this.getHibernateTemplate().getSessionFactory().getCurrentSession().merge(t);
            getHibernateTemplate().update(t);
        } catch (DataAccessException e) {
            e.printStackTrace();
            b=false;
        }
            
        return b;
    }