jcifs

Common Internet File System Client in 100% Java

The jCIFS SMB client library enables any Java application to remotely access shared files and directories on SMB file servers(i.e. a Microsoft Windows "share") in addition to domain, workgroup, and server enumeration of NetBIOS over TCP/IP networks. It is an advanced implementation of the CIFS protocol supporting Unicode, batching, multiplexing of threaded callers, encrypted authentication, transactions, the Remote Access Protocol (RAP), and much more. It is licensed under LGPL which means commercial organizations can legitimately use it with their proprietary code(you just can't sell or give away a modified binary only version of the library itself without reciprocation).