我正在做一个项目，修改后，稍后会将一些文件上传到FTP服务器...除了弄清楚文件的上传之外，我什么都没有。 我可以成功连接到FTP服务器，但是一旦文件上传，该程序将挂起几分钟，然后显示超时。

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

这是我用于FTP连接的代码：(请记住，我省略了登录详细信息)

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，我才真正真正了解过Apache Commons FTP。 如果有人可以提供一些见识，我将不胜感激

编辑：我忘了提一下，在添加以下行之前，文件已传输，但是当我尝试在服务器上打开它时，它是空的。

fClient.enterLocalPassiveMode();

fClient.setFileType(FTP.BINARY_FILE_TYPE);