weblogic解决clob添加失败 classcastexception

1 jdk1.4.2 + hibernate3，采用反射技术 News news = new News(); news.setNewsTitle(newsTitle); news.setNewsContent(Hibernate.createClob(" ")); arg0.save(news); arg0.flush(); // 2 执行select for update方法,也就是加行级排它锁 arg0.refresh(news, LockMode.UPGRADE); Object obj = news.getNewsContent();//空clob oracle.sql.CLOB clob; try { Method method = obj.getClass().getMethod("getWrappedClob",new Class[]{}); clob = (CLOB)method.invoke(news.getNewsContent(),null); Writer out = clob.getCharacterOutputStream(); out.write("写入数据库的内容"); out.close(); } catch (SecurityException e1) { e1.printStackTrace(); } catch (IllegalArgumentException e1) { e1.printStackTrace(); } catch (NoSuchMethodException e1) { e1.printStackTrace(); } catch (IllegalAccessException e1) { e1.printStackTrace(); } catch (InvocationTargetException e1) { e1.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }