我正在創(chuàng)建將文件傳輸?shù)娇蛻舳说奈募鬏敵绦?。但是?dāng)我傳輸文件時(shí)，它丟失了每一行的第一個(gè)字母。我的代碼有什么問題？我是 java 的新手，所以我不知道下一步該做什么。我試過更改字節(jié)大小但沒有幫助。我應(yīng)該怎么辦？Server.javaimport java.io.*;import java.net.ServerSocket;import java.net.Socket;import java.util.Scanner;class Server { public static void main(String[] args) throws IOException { FileInputStream fis = null; BufferedInputStream bis = null; OutputSteam os = null; ServerSocket serverSocket = null; Scanner scan = new Scanner(System.in); String fileSend; System.out.print("Type the path to the file to send >> "); fileSend = scan.nextLine(); try { serverSocket = new ServerSocket(5467); } catch (Exception e) { System.out.println("Could not bind to port 5467, Maybe address is already is use or you need to run as administrator"); return; } System.out.println("Listening on port 5467"); System.out.println("Waiting for the connection..."); while (true) { File FileSend = null; Socket socket = serverSocket.accept(); OutputStream out = socket.getOutputStream(); System.out.println("Accepted connection : " + socket); InputStream in = socket.getInputStream(); DataInputStream dataIn = new DataInputStream(in); String login = dataIn.readUTF(); String password = dataIn.readUTF(); String result = "You credential is "; if (login.equals("1c18b5cdef8f9b4c5d6b2ad087265e597d1d4639337b73a04a335103c00ec64b") && password.equals("1c18b5cdef8f9b4c5d6b2ad087265e597d1d4639337b73a04a335103c00ec64b13d0b73358bfa8978dfaaf180565bcfecd3dc0631cda525920865145fb3fa131")) { result += "correct"; } else { result += "incorrect"; } } }
2 回答
郎朗坤
TA貢獻(xiàn)1921條經(jīng)驗(yàn) 獲得超9個(gè)贊
文件是可序列化的，所以我建議您應(yīng)該嘗試直接通過 ObjectOutputStream / ObjectInputStream 發(fā)送它。
例如在服務(wù)器端：
ObjectInputStream in = new ObjectInputStream(socket.getInputStream());
ObjectOutputStream out = new ObjectOutputStream(socket.getOutputStream());
...
out.writeObject(yourFileObject);
在客戶端：
ObjectInputStream in = new ObjectInputStream(socket.getInputStream());
ObjectOutputStream out = new ObjectOutputStream(socket.getOutputStream());
...
File receivedFile = null;
try {
receivedFile = (File) in.readObject();
}
catch (IOException e) {
...
}
眼眸繁星
TA貢獻(xiàn)1873條經(jīng)驗(yàn) 獲得超9個(gè)贊
我不完全確定為什么會(huì)發(fā)生這種情況，但您不應(yīng)該使用DataInputStreamwhich “讓應(yīng)用程序讀取原始 Java 數(shù)據(jù)類型”，而InputStreamReaderwhich “是從字節(jié)流到字符流的橋梁”。
此外，您可以將該閱讀器包裝成一個(gè)BufferedReader讓您逐行閱讀的內(nèi)容，您最終會(huì)得到類似
try (BufferedReader reader=new BufferedReader(new InputStreamReader(inStream, UTF8));
? ? ?PrintWriter writer = new PrintWriter(file)) {
? ? reader.lines().forEach(writer::println);
}
上傳，或
try (PrintWriter writer = new PrintWriter(outStream)) {
? ? Files.lines().forEach(writer::println);
}
下載。
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