FTP 客戶端Java 類庫，ftp4j 1.7.2 發布

ftp4j是一個FTP客戶端Java類庫，實現了FTP客戶端 應具有的大部分功能。可以將ftp4j嵌到你的Java應用中，來傳輸文件（包括上傳和下 載），瀏覽遠程FTP服務器上的目錄和文件，創建、刪除、重命，移動遠程目錄和文件。ftp4j提供多種方式連接到遠程FTP服務器包括：通過 TCP/IP直接連接，通過FTP代理、HTTP代理、SOCKS4/4a代理和SOCKS5代理連接，通過SSL安全連接。

• Price, licence and support
  • Just a word: LGPL. The ftp4j library is 100% Free Software.
• Connectivity
  The ftp4j library can connect the remote FTP server:
  • Through a direct TCP/IP connection.
  • Through a FTP proxy.
  • Tunnelling through a HTTP proxy.
  • Through a SOCKS 4/4a proxy.
  • Through a SOCKS 5 proxy.
  • You can add support to other proxies plugging your own connector, since the ftp4j connection manager architecture is modular.
• Security
  • Basic FTP authentication.
  • FTPS (FTP over implicit TLS/SSL).
  • FTPES (FTP over explicit TLS/SSL).
• Browsing the remote site
  • FTP LIST and MLSD command support through extensible parser architecture. Bundled parsers can handle: UNIX style listing, MAC style, DOS style, NetWare style and variants, EPLF style and MLST / MLSD responses. Moreover you can build your own parser and plug it in the library.
  • Clear object representation of directory contents.
• Download and upload
  • Active and passive transfer mode support.
  • Binary and textual transfer type support, with optional and extensible type auto-selection.
  • Compressed transfer mode support (MODE Z).
  • Event-based transfer monitoring.
  • Transfer abortion support.
  • Transfer resume support.
  • Append mode upload support.
• Java exceptions
  • Structured exceptions let the developer know the real cause of any failure.

示例代碼：

FTPClient client = new FTPClient();
client.connect("ftp.host.com", port);
client.login("carlo", "mypassword");
client.createDirectory("newfolder");
client.disconnect(true);

ftp4j 1.7.2 發布，該版本修復了下載模塊方面的bug，正確處理了 "502 Command REST not allowed by policy" 消息。