hibernate更新

1、使用对象更新

	public void updateImagePath(Weibo weibo){
		Session session = HibernateUtil.currentSession();
		try {
			Transaction tx = session.beginTransaction();
			session.update(weibo);
			tx.commit();
		} catch (Exception e) {
			// TODO: handle exception
			System.err.println("search failed!!!!!!");
		}finally{
			HibernateUtil.closeSession();
			HibernateUtil.sessionFactory.close();
		}
	}

2、使用sql语句更新

	public int updateImagePath1(String imagePath, String weiboId){
		Session session = HibernateUtil.currentSession();
		try {
			String sql = "update t_weiboo set imagePath='"+imagePath+"' where weiboId='M_Boj1Wc4xC';";
			Transaction tx = session.beginTransaction();
			Query query = session.createSQLQuery(sql);
			int state= query.executeUpdate();
			tx.commit();
			if(state==1)
				System.out.println("修改路径成功！");
			return state;
		} catch (Exception e) {
			// TODO: handle exception
			System.err.println("search failed!!!!!!");
		}finally{
			HibernateUtil.closeSession();
			HibernateUtil.sessionFactory.close();
		}
		return 0;
	}

3、先通过id获取对象，再更新

	public void update1() {
		
		Session session = HibernateUtil.currentSession();
		Transaction tx = session.beginTransaction();
		Weibo wb = (Weibo) session.get(Weibo.class, 3);
		wb.setImagePath("");
		session.update(wb);
		tx.commit();

	}