fileService類中
//添加文件
	public?boolean?addFile(File?f){
		try?{
			String?sql="insert?into?socket_file(fname,fcontent)?value(?,?)";
			conn=DBUtil.getconnection();
			PreparedStatement?ps=conn.prepareStatement(sql);
			ps.setString(1,?f.getFname());
			ps.setBytes(2,?f.getFcontent());
			ps.executeUpdate();
			return?true;
		}?catch?(SQLException?e)?{
			e.printStackTrace();
			return?false;
		}
	}

socketClient類中
	//文件上傳
	public?void?showAddfile(){
		System.out.println("請輸入要上傳的文件的覺得路徑（如：e:/imooc/dog.jpg）：");
		File?file=new?File();
		String?path=input.next();
		CommandTansfer?transfer=new?CommandTansfer();
		FileInputStream?fis=null;
		BufferedInputStream?bis=null;
		java.io.File?fileInfo=new?java.io.File(path);
		if(fileInfo.exists()&&fileInfo.isFile()){
			file.setFname(fileInfo.getName());
			transfer.setCmd("addFile");
			try?{
				fis=new?FileInputStream(fileInfo);
				byte[]?fcontent=new?byte[fis.available()];
				bis=new?BufferedInputStream(fis);
				bis.read(fcontent);
				file.setFcontent(fcontent);
				transfer.setData(file);
				//與服務器進行通信
				socket=new?Socket("127.0.0.1",?8858);
				sendData(transfer);
				//接收服務器數據
				CommandTansfer?result=getData();
				if(result.isFlag()){
					System.out.println("********上傳文件成功********");
				}else{
					System.out.println("********上傳文件失敗********");
				}
				fis.close();
				bis.close();
			}catch?(Exception?e)?{
			e.printStackTrace();
			}
		}
	}
	
	//向服務器發送數據
	private?void?sendData(CommandTansfer?transfer){
		OutputStream?out;
		try?{
			out?=?socket.getOutputStream();
			ObjectOutputStream?oos=new?ObjectOutputStream(out);
			oos.writeObject(transfer);
			oos.flush();
		}?catch?(IOException?e)?{
			e.printStackTrace();
		}
	}
	//接收服務器的數據
	private?CommandTansfer?getData(){
		CommandTansfer?result=null;
		try?{
			ObjectInputStream?ois=new?ObjectInputStream(
					socket.getInputStream());
			result=(CommandTansfer)ois.readObject();
		}?catch?(IOException?e)?{
			e.printStackTrace();
		}?catch?(ClassNotFoundException?e)?{
		e.printStackTrace();
	}
		return?result;
	}