jsp实现仿QQ空间新建多个相冊名称，向相冊中加入照片

public class UpDAOImpl implements UpDAO {

	/* (non-Javadoc)
	 * @see cn.jvsun.DAO.UpDAO#creAlbum(cn.jvsun.POJO.AlbumPOJO)
	 * 创建相冊名称
	 */
	public int creAlbum(AlbumPOJO ap) {
		int albumNum=this.getAlbumNum();
		Connection conn = null;
		PreparedStatement pstate = null;
		try {
			conn=JDBCHelper.getConn();
			conn.setAutoCommit(false);
			String sql="insert into album(id,a_name,user_id)values(?,?
,?)";
			pstate = conn.prepareStatement(sql);
			pstate.setInt(1, albumNum);
			pstate.setString(2,ap.getA_name());
			pstate.setInt(3, ap.getUser_id());
			pstate.execute();
			conn.commit();

		} catch (Exception e) {
			e.printStackTrace();
			try {
				conn.rollback();//出问题就撤回，全不提交
			} catch (SQLException e1) {
				e1.printStackTrace();
			}
		}finally{
			try {
				pstate.close();
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return albumNum;
	}

	/* (non-Javadoc)
	 * @see cn.jvsun.DAO.UpDAO#upPhoto(java.lang.String, java.lang.String, int)
	 * 上传照片
	 */
	public int upPhoto(PhotoPOJO pp) {
		int pNum=this.getPhotoNum();
		Connection conn = null;
		PreparedStatement pstate = null;
		try {
			conn=JDBCHelper.getConn();
			conn.setAutoCommit(false);
			String sql="insert into photo(id,p_name,p_url,p_albumid)values(?,?,?,?)";
			pstate = conn.prepareStatement(sql);
			pstate.setInt(1, pNum);
			pstate.setString(2,pp.getP_name());
			pstate.setString(3, pp.getP_url());
			pstate.setInt(4, pp.getP_albumId());
			pstate.execute();
			conn.commit();

		} catch (Exception e) {
			e.printStackTrace();
			try {
				conn.rollback();//出问题就撤回，全不提交
			} catch (SQLException e1) {
				e1.printStackTrace();
			}
		}finally{
			try {
				pstate.close();
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return pNum;
	}

	/* (non-Javadoc)
	 * @see cn.jvsun.DAO.UpDAO#delAlbum(int)
	 * 删除相冊
	 */
	public int delAlbum(int id) {
		int result=0; 
		Connection conn = null;
		PreparedStatement pstate = null;
		String sql="delete from album where id="+id+""; 
		try {
			conn=JDBCHelper.getConn();
			pstate = conn.prepareStatement(sql);
			result=pstate.executeUpdate();
		} catch (SQLException e) {
			e.printStackTrace();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				pstate.close();
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		return result;
         
        
	}

	/* (non-Javadoc)
	 * @see cn.jvsun.DAO.UpDAO#delPhoto(int)
	 * 删除照片
	 */
	public int delPhoto(int id) {
		int result=0; 
		Connection conn = null;
		PreparedStatement pstate = null;
		String sql="delete from photo where id="+id+""; 
		try {
			conn=JDBCHelper.getConn();
			pstate = conn.prepareStatement(sql);
			result=pstate.executeUpdate();
		} catch (SQLException e) {
			e.printStackTrace();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				pstate.close();
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		return result;
	}
	/* (non-Javadoc)
	 * @see cn.jvsun.DAO.UpDAO#login(java.lang.String, java.lang.String)
	 * 用户登录
	 */
	public UserPOJO login(String username, String password) {
		UserPOJO user=null;
		Connection conn = null;
		PreparedStatement pstate = null;
		ResultSet res = null;
		try {
			conn=JDBCHelper.getConn();
			String sql="select id,username from userinfo where username=? and password=?";
			pstate = conn.prepareStatement(sql);
			pstate.setString(1, username);
			pstate.setString(2, password);
			res = pstate.executeQuery();
			while(res.next()){
				user=new UserPOJO(res.getInt(1),username,null);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				res.close();
				pstate.close();
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
			
		}
		return user;
	}
	/**
	 * 相冊序列号
	 */
	public int getAlbumNum(){
		int albumNum=-1;
		Connection conn = null;
		PreparedStatement pstate = null;
		ResultSet res = null;
		try {
			conn=JDBCHelper.getConn();
			String sql="select aid.nextval from dual";
			pstate=conn.prepareStatement(sql);
			res=pstate.executeQuery();
			while(res.next()){
				albumNum=res.getInt(1);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				res.close();
				pstate.close();
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return albumNum;
	}
	/**
	 *照片序列号
	 */
	public int getPhotoNum(){
		int photoNum=-1;
		Connection conn = null;
		PreparedStatement pstate = null;
		ResultSet res = null;
		try {
			conn=JDBCHelper.getConn();
			String sql="select pid.nextval from dual";
			pstate=conn.prepareStatement(sql);
			res=pstate.executeQuery();
			while(res.next()){
				photoNum=res.getInt(1);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				res.close();
				pstate.close();
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return photoNum;
	}

	/* (non-Javadoc)
	 * @see cn.jvsun.DAO.UpDAO#findAll()
	 * 显示所创建的相冊名
	 */
	public List findAllAlbum(int id) {
		List list= new ArrayList();
		Connection conn = null;
		PreparedStatement pstate = null;
		ResultSet res = null;
		try {
			conn=JDBCHelper.getConn();
			String sql="select id,a_name,user_id from album where user_id=?";
			pstate = conn.prepareStatement(sql);
			pstate.setInt(1, id);
			res = pstate.executeQuery();
			while(res.next()){
				AlbumPOJO ap=new AlbumPOJO(res.getInt(1),res.getString(2),res.getInt(3));
				list.add(ap);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				res.close();
				pstate.close();
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
			
		}
		return list;
	}

	/* (non-Javadoc)
	 * @see cn.jvsun.DAO.UpDAO#findAllPhoto(int)
	 * 显示照片
	 */
	public List findAllPhoto(int aid) {
		List list= new ArrayList();
		Connection conn = null;
		PreparedStatement pstate = null;
		ResultSet res = null;
		try {
			conn=JDBCHelper.getConn();
			String sql="select id,p_name,p_url from photo where P_ALBUMID=?";
			pstate = conn.prepareStatement(sql);
			pstate.setInt(1, aid);
			res = pstate.executeQuery();
			while(res.next()){
				PhotoPOJO pojo=new PhotoPOJO(res.getInt(1),res.getString(2),res.getString(3), aid);
				list.add(pojo);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				res.close();
				pstate.close();
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
			
		}
		return list;
	}

	
}