org.hibernate.LazyInitializationException: could not initialize proxy - the owni,该怎么解决-Java教程-爱易网页

org.hibernate.LazyInitializationException: could not initialize proxy - the owni,该怎么解决

日期：2014-05-20　浏览次数：21063 次

org.hibernate.LazyInitializationException: could not initialize proxy - the owni
Action:

Java code


public Cardinfo findById(Long id) {
        Session session = HibernateSessionFactory.getSession();
        Transaction tx = null;
        Cardinfo cinfo = null;
        try {
            tx = session.beginTransaction();
            cinfo = (Cardinfo) session.load(Cardinfo.class, id);
            tx.commit();
        } catch (RuntimeException re) {
            tx.rollback();
            log.error("==CardinfoServices findById failed==", re);
        } finally {
            session.close();
        }
        return cinfo;
    }

Java code


String cidLoad = request.getParameter("cidLoad");
            Cardinfo cardinfo = cardinfoSer.findById(new Long(cidLoad));
            cardinfoForm.setCardid(new Long(cidLoad));
            cardinfoForm.setCardname(cardinfo.getCardname());
            cardinfoForm.setPhonenum(cardinfo.getPhonenum());
            cardinfoForm.setCardstate(cardinfo.getCardstate());
            cardinfoForm.setOtherinfo(cardinfo.getOtherinfo());

            System.out.println("oid: "
                    + cardinfo.getCardownerinfo().getOwnerid());
            System.out.println("oid: "
                    + cardinfo.getCardownerinfo().getOwnername());

错误指向这行：
cardinfoForm.setCardname(cardinfo.getCardname());

于是修改：

Java code


public Cardinfo findById(Long id) {
        Session session = HibernateSessionFactory.getSession();
        Transaction tx = null;
        Cardinfo cinfo = null;
        try {
            tx = session.beginTransaction();
            cinfo = (Cardinfo) session.load(Cardinfo.class, id);
            Hibernate.initialize(cinfo);
            tx.commit();
        } catch (RuntimeException re) {
            tx.rollback();
            log.error("==CardinfoServices findById failed==", re);
        } finally {
            session.close();
        }
        return cinfo;
    }

程序还是报错：org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed

错误指向：
System.out.println("oid: "
+ cardinfo.getCardownerinfo().getOwnername());

这该如何解决呢？

------解决方案--------------------
查看下关于hibernate检索策略的文章
不知道你是怎么关联的
只设置关联级别的lazy=false不一定起作用还要看对方类级别的lazy
------解决方案--------------------
cardinfoForm.setCardname(cardinfo.getCardname());还是
cardinfo.getCardownerinfo().getOwnername());
两帖说的好像不统一啊
如果是第二句,就是关联的对象没有查到,为什么呢/
你cinfo = (Cardinfo) session.load(Cardinfo.class, id);
Hibernate.initialize(cinfo);根本没有作用,因为load加载了Cardinfo但它没有加载Cardownerinfo所以不可能得到ownername(many-to-one 如果lazy没有设置或是设为true)
你应该是Hibernate.initialize(cinfo.getOwnerinfo());

如果是第一句,不至于这样吧.查询它本身也会出错?LOAD先加载ID,如果只要ID的话,就不会再加载其它的.但如果有需要其它属性,应该也会查出的啊
------解决方案--------------------
finally {
session.close();
}
你都把session关闭了，怎么会延迟加载呢？
------解决方案--------------------

探讨
cardinfoForm.setCardname(cardinfo.getCardname());还是
cardinfo.getCardownerinfo().getOwnername());
两帖说的好像不统一啊
如果是第二句,就是关联的对象没有查到,为什么呢/
你cinfo = (Cardinfo) session.load(Cardinfo.class, id);
Hibernate.initialize(cinfo);根本没有作用,因为load加载了Cardinfo但它没有加载Cardownerinfo所以不可能得到ownername(many-to-one 如果lazy没有设置或是设为true)

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org.hibernate.LazyInitializationException: could not initialize proxy - the owni,该怎么解决

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