功能1也試過，都沒有反應了，求解

public?class?socketClient?{
	private?Scanner?input?=?new?Scanner(System.in);
	private?Socket?socket=null;
	private?ObjectOutputStream?oos;
	private?ObjectInputStream?ois;

	public?void?shouMainMenu()?{
		System.out.println("***歡迎使用文件上傳器***");
		System.out.println("---登錄請按1---");
		System.out.println("---注冊請按2---");
		System.out.println("---退出請按3---");
		System.out.println("***********************");
		System.out.println("請選擇");
		int?choice?=?input.nextInt();
		switch?(choice)?{
		case?1:
			showLogin();
			break;
		case?2:
			showRegister();
			break;
		case?3:
			System.out.println("再見");
			System.exit(0);
		default:
			System.out.println("輸入有誤");
			System.exit(0);
		}
	}
/**
?*?登錄
?*/
	public?void?showLogin()?{
		?User?user?=?new?User();
		int?count?=?0;
		CommandTransfer?transfer?=?new?CommandTransfer();
		while?(true)?{
			count++;
			if?(count?>?3)?{
				System.out.println("你已經三次登錄失敗，程序退出");
				System.exit(0);
			}
			System.out.println("請輸入用戶名：");
			user.setUsername(input.next());
			System.out.println("請輸入密碼：");
			user.setPassword(input.next());
			transfer.setCmd("login");
			transfer.setData(user);
			try?{
				socket?=?new?Socket("localhost",?8888);
				sendData(transfer);
				transfer?=?getData();
				System.out.println(transfer.getResult());
				System.out.println("*********************************");
				if?(transfer.isFlag())?{
					break;
				}
			}?catch?(IOException?e)?{
				e.printStackTrace();
			}?finally?{
				close();
			}
		}
		showUploadFile();
	}
/**
?*?注冊
?*/
	public?void?showRegister()?{
		User?user?=?new?User();
		CommandTransfer?transfer?=?new?CommandTransfer();
		while?(true)?{
			System.out.println("請輸入用戶名：");
			user.setUsername(input.next());
			System.out.println("請輸入密碼：");
			user.setPassword(input.next());
			System.out.println("請再次輸入密碼：");
			String?rePassword?=?input.next();
			if?(!user.getPassword().equals(rePassword))?{
				System.out.println("2次密碼不一致");
				System.out.println("*********************************");
				continue;
			}
			transfer.setCmd("register");
			transfer.setData(user);
			try?{
				socket?=?new?Socket("localhost",?8888);
				sendData(transfer);
				transfer?=?getData();
				System.out.println(transfer.getResult());
				System.out.println("*********************************");
				if?(transfer.isFlag())?{
					break;
				}
			}?catch?(IOException?e)?{
				e.printStackTrace();
			}?finally?{
				close();
			}
		}
		showLogin();
	}
/**
?*?上傳文件
?*/
	public?void?showUploadFile()?{
		File?file?=?new?File();
		FileInputStream?fis?=?null;
		BufferedInputStream?bis?=?null;
		CommandTransfer?transfer?=?new?CommandTransfer();
		while?(true)?{
			System.out.println("請輸入文件的絕對路徑");
			String?path?=?input.next();
			String?fname?=?path.substring(path.lastIndexOf("/")?+?1);
			file.setFname(fname);
			try?{
				fis?=?new?FileInputStream(path);
				bis?=?new?BufferedInputStream(fis);
				byte[]?fcontent?=?new?byte[fis.available()];
				bis.read(fcontent);
				file.setFname(fname);
				file.setFconcent(fcontent);
			}?catch?(FileNotFoundException?e)?{
				e.printStackTrace();
			}?catch?(IOException?e)?{
				e.printStackTrace();
			}?finally?{
				try?{
					bis.close();
					fis.close();
					socket.close();
				}?catch?(IOException?e)?{
					e.printStackTrace();
				}
			}
			transfer.setCmd("save");
			transfer.setData(file);

			try?{
				//?將數據傳遞給服務器
				socket?=?new?Socket("localhost",?8888);
				sendData(transfer);
				transfer?=?getData();
				System.out.println(transfer.getResult());
				System.out.println("*********************************");
			}?catch?(IOException?e)?{
				e.printStackTrace();
			}?finally?{
				close();
			}
		}
		
	}

	/**
	?*?發送數據
	?*/
	public?void?sendData(CommandTransfer?transfer)?{
		try?{
			socket?=?new?Socket("localhost",?8888);
			oos?=?new?ObjectOutputStream(socket.getOutputStream());
			oos.writeObject(transfer);
			oos.flush();
		}?catch?(IOException?e)?{
			e.printStackTrace();
		}
	}

	/**
	?*?接收數據
	?*/
	public?CommandTransfer?getData()?{
		CommandTransfer?transfer=new?CommandTransfer();
		try?{
			socket?=?new?Socket("localhost",?8888);
			InputStream?inputStream?=?socket.getInputStream();
			ois?=?new?ObjectInputStream(inputStream);
			transfer?=?(CommandTransfer)?ois.readObject();
		}?catch?(IOException?e)?{
			e.printStackTrace();
		}?catch?(ClassNotFoundException?e)?{
			e.printStackTrace();
		}
		return?transfer;
	}

	/**
	?*?關閉連接
	?*/
	public?void?close()?{
		try?{
			if?(ois?!=?null)
				ois.close();
			if?(oos?!=?null)
				oos.close();
			if?(socket?!=?null)
				socket.close();
		}?catch?(IOException?e)?{
			e.printStackTrace();
		}
	}
}