使用org.apache.commons.net.ftp.FTPClient保護FTP

Question

有沒有辦法通過org.apache.commons.net.ftp.FTPClient實現安全的FTP？

如果不是，還有什麼其他Java選項？

Answer 1

您可以使用org.apache.commons.net.ftp。 FTPSClient而不是org.apache.commons.net.ftp。 FTPClient有安全的FTP http://commons.apache.org/proper/commons-net/apidocs/org/apache/commons/net/ftp/FTPSClient.html

Answer 2

嘗試Java的安全通道

它支持SFTP

http://www.jcraft.com/jsch/

例子可以發現here

Answer 3

如何努力Apache的駱駝，

http://camel.apache.org/ftp2.html

Answer 4

Apache FTPClient目前不支持SFTP。但是，您可以使用JSch - Java Secure Channel。

Onkar Joshi更詳細地介紹了用於在Java中進行FTP，SFTP，FTPS文件傳輸的庫。

使用JSch與SFTP傳輸文件的例子如下：

... 

private static final Logger logger = Logger.getLogger(YourClass.class.getName()); 

public boolean sendDataViaSFTP(String contents) throws Exception { 
    String hostname = "<FTP hostname/IP>"; 
    String username = "<FTP username>"; 
    String password = "<FTP password>"; 
    String remoteDirectory = "<FTP remote directory>"; 
    int ftpPort = 22; 

    logger.info("*** Creating FTP session. ***"); 
    JSch jsch = new JSch(); 
    Session session = null; 
    Channel channel = null; 
    ChannelSftp c = null; 

    //Now connect and SFTP to the SFTP Server 
    try { 
     //Create a session sending through our username and password 
     session = jsch.getSession(username, hostname, ftpPort); 
     logger.info("*** FTP Session created. ***"); 
     session.setPassword(password); 

     //Security.addProvider(new com.sun.crypto.provider.SunJCE()); 
     //Setup Strict HostKeyChecking to no so we dont get the 
     //unknown host key exception 
     Properties config = new Properties(); 
     config.put("StrictHostKeyChecking", "no"); 
     session.setConfig(config); 
     session.connect(); 
     logger.info("*** Session connected. ***"); 

     //Open the SFTP channel 
     logger.info("*** Opening FTP Channel. ***"); 
     channel = session.openChannel("sftp"); 
     channel.connect(); 
     c = (ChannelSftp) channel; 

     //Change to the remote directory 
     logger.info("*** Changing to FTP remote dir: " + remoteDirectory + " ***"); 
     c.cd(remoteDirectory); 

     //Send the file we generated 
     try { 
      String filename = "myfile.txt"; 

      logger.info("*** Storing file as remote filename: " + filename + " ***"); 

      ByteArrayInputStream bis = new ByteArrayInputStream(contents.getBytes()); 
      c.put(bis, filename); 
      return true; 
     } catch (Exception e) { 
      logger.info("*** Storing remote file failed. " + e.toString() + " ***"); 
      throw e; 
     } 
    } catch (Exception e) { 
     logger.info("*** Unable to connect to FTP server. " + e.toString() + " ***"); 
     throw e; 
    } finally { 
     // 
     //Disconnect from the FTP server 
     // 
     try { 
      if(session != null) 
       session.disconnect(); 

      if(channel != null) 
       channel.disconnect(); 

      if(c != null) 
       c.quit(); 
     } catch (Exception exc) { 
      logger.severe("*** Unable to disconnect from FTP server. " + exc.toString()+" ***"); 
     } 

     logger.info("*** SFTP Process Complete. ***"); 
    } 

} 

... 

Answer 5

首先，確保你理解FTPS（安全FTP）和SFTP之間的差異：
FTPS versus SFTP versus SCP

如果您需要FTPS（安全FTP），你可以使用FTPSClient而不是從FTPClient阿帕奇百科全書庫：
https://commons.apache.org/proper/commons-net/apidocs/org/apache/commons/net/ftp/FTPSClient.html

如果需要SFTP，請參閱：
How to retrieve a file from a server via SFTP?
Java SFTP Transfer Library