您可以尝试以下代码,我希望它也适用于您的情况.

该代码使用Apache Commons vsf2通过安全ftp连接(SFTP)上传文件

try {

String filepath = "";

String serverAddress = "";

String userId = "";

String password = "";

String remoteDirectory = "";

String keyPath = "";

String passPhrase = "";

File file = new File(filepath);

if (!file.exists())

throw new RuntimeException("Error. File not found");

//Initializes the file manager

StandardFileSystemManager manager = new StandardFileSystemManager();

manager.init();

//Setup our SFTP configuration

FileSystemOptions opts = new FileSystemOptions();

SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(opts, "no");

SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);

SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000);

// Create local file object

FileObject localFile = manager.resolveFile(file.getAbsolutePath());

// Create remote file object

FileObject remoteFile = manager.resolveFile(createConnectionString(serverAddress, userId, password, keyPath, passPhrase, fileToFTP), createDefaultOptions(keyPath, passPhrase));

// Copy local file to sftp server

remoteFile.copyFrom(localFile, Selectors.SELECT_SELF);

System.out.println("File upload successful");

}

catch (Exception ex) {

ex.printStackTrace();

return false;

}

finally {

manager.close();

}

编辑

在理解了FTPS背后的逻辑和@ riyaz-ali的帖子并将您的评论中的链接引用到this article之后

Apache FTP客户端存在问题,它不支持TLS会话恢复.您可以修补Apache Commons Library的现有实现.

您可以尝试以下代码步骤来使其工作：

>在项目中添加以下修补的类. (此类扩展了Apache commons中给出的补丁中现有的FTPS实现)

import java.io.IOException;

import java.lang.reflect.Field;

import java.lang.reflect.Method;

import java.net.Socket;

import java.util.Locale;

import javax.net.ssl.SSLSession;

import javax.net.ssl.SSLSessionContext;

import javax.net.ssl.SSLSocket;

import org.apache.commons.net.ftp.FTPSClient;

import com.google.common.base.Throwables;

public class PatchedFTPSClient extends FTPSClient {

@Override

protected void _prepareDataSocket_(final Socket socket) throws IOException {

if(socket instanceof SSLSocket) {

final SSLSession session = ((SSLSocket) _socket_).getSession();

final SSLSessionContext context = session.getSessionContext();

try {

final Field sessionHostPortCache = context.getClass().getDeclaredField("sessionHostPortCache");

sessionHostPortCache.setAccessible(true);

final Object cache = sessionHostPortCache.get(context);

final Method method = cache.getClass().getDeclaredMethod("put", Object.class, Object.class);

method.setAccessible(true);

final String key = String.format("%s:%s", socket.getInetAddress().getHostName(),

String.valueOf(socket.getPort())).toLowerCase(Locale.ROOT);

method.invoke(cache, key, session);

} catch(Exception e) {

throw Throwables.propagate(e);

}

}

}

}

>使用此修改后的代码段.

TransferImagenesFTP.ftpClient = new PatchedFTPSClient();

TransferImagenesFTP.ftpClient.connect(InetAddress.getByName"), 26);

TransferImagenesFTP.ftpClient.login("", "");

TransferImagenesFTP.ftpClient.execPBSZ(0);

TransferImagenesFTP.ftpClient.execPROT("P");

TransferImagenesFTP.ftpClient.enterLocalPassiveMode();

//Now use the FTP client to upload the file as usual.

希望这对您有用,并将解决您的问题.