我正在做一個項目，修改后，稍后會將一些文件上傳到FTP服務器...除了弄清楚文件的上傳之外，我什么都沒有。 我可以成功連接到FTP服務器，但是一旦文件上傳，該程序將掛起幾分鐘，然后顯示超時。

java.net.ConnectException: Connection timed out: connect

at java.net.DualStackPlainSocketImpl.connect0(Native Method)

at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)

at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)

at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)

at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)

at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

at java.net.Socket.connect(Socket.java:579)

at org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:762)

at org.apache.commons.net.ftp.FTPClient._storeFile(FTPClient.java:565)

at org.apache.commons.net.ftp.FTPClient.__storeFile(FTPClient.java:557)

at org.apache.commons.net.ftp.FTPClient.storeFile(FTPClient.java:1795)

at AdvertisementCreator.main(AdvertisementCreator.java:128)

e

這是我用于FTP連接的代碼：(請記住，我省略了登錄詳細信息)

FTPClient fClient = new FTPClient();

try {

fClient.connect(server, port);

showServerReply(fClient);

int replyCode = fClient.getReplyCode();

if (!FTPReply.isPositiveCompletion(replyCode)) {

System.out.println("Operation failed. Server reply code: " + replyCode);

return;

}

boolean success = fClient.login(user, pass);

showServerReply(fClient);

if (!success) {

System.out.println("Could not login to the server");

} else {

System.out.println("You are now logged on!");

loginLoop = false;

}

fClient.enterLocalPassiveMode();

fClient.setFileType(FTP.BINARY_FILE_TYPE);

File localFile = new File("files\\shared.txt");

String remoteFile = "shared.txt";

InputStream inputStream = new FileInputStream(localFile);

System.out.println("Start uploading the file");

boolean done = fClient.storeFile(remoteFile, inputStream);

inputStream.close();

if (done) {

System.out.println(remoteFile+" has been uploaded successfully");

}

} catch (IOException ex) {

System.out.println("Oops! Something wrong happened");

ex.printStackTrace();

}finally {

try {

if (fClient.isConnected()) {

fClient.logout();

fClient.disconnect();

System.out.println("FTP Disconnected");

}

} catch (IOException ex) {

ex.printStackTrace();

}

}

直到今天，我才真正真正了解過Apache Commons FTP。 如果有人可以提供一些見識，我將不勝感激

編輯：我忘了提一下，在添加以下行之前，文件已傳輸，但是當我嘗試在服務器上打開它時，它是空的。

fClient.enterLocalPassiveMode();

fClient.setFileType(FTP.BINARY_FILE_TYPE);

總結

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