由于公司需要，在网上找了一下支持SFTP的包，发现俩个不错的，一个是 Secure FTP Factory ，一个是 J2SSH Maverick ，但都是收费的,现在简单介绍一下 J2SSH Maverick 怎样简单使用。代码如下：
/* HEADER */
import com.maverick.ssh.*;
import com.maverick.ssh2.*;
import java.io.*;

import com.sshtools.net.*;
import com.sshtools.sftp.*;

/**
 * This example demonstrates the connection process connecting to an SSH2 server
 * and usage of the SFTP client.
 */
public class MySftpConnect {
 public static void main(String[] args) {
  MySftpConnect c = new MySftpConnect();
  c.createSftpClient("192.168.0.108", "szb", "szbpatternx86", 22);－－参数依次为主机名，用户名，密码，端口号。
 }

 public void createSftpClient(String hostname, String username,
   String password, int port) {
  try {
   System.out.println("Connecting to " + hostname);

   // Create an SshConnector instance
   SshConnector con = SshConnector.getInstance();

   // Connect to the host
   SocketTransport t = new SocketTransport(hostname, port);
   t.setTcpNoDelay(true);
   SshClient ssh = con.connect(t, username);
   Ssh2Client ssh2 = (Ssh2Client) ssh;

   // Authenticate the user using password authentication
   com.maverick.ssh.PasswordAuthentication pwd = new com.maverick.ssh.PasswordAuthentication();
   do {
    pwd.setPassword(password);
   } while (ssh2.authenticate(pwd) != SshAuthentication.COMPLETE
     && ssh.isConnected());
   // Start a session and do basic IO
   if (ssh.isAuthenticated()) {
    SftpClient sftp = new SftpClient(ssh2);
    // test create file.
    this.createTestFile(sftp);
   }
  } catch (Throwable th) {
   th.printStackTrace();
  }
 }

//测试IO操作
 public void createTestFile(SftpClient sftp) throws Exception {

  File textFile = new File(System.getProperty("user.home"), "shining.txt");
  FileOutputStream tout = new FileOutputStream(textFile);

  // Create a file with \r\n as EOL
  for (int i = 0; i < 100; i++) {
   tout.write("All work and no play makes Jack a dull boy中文\r\n"
     .getBytes());
  }
  tout.close();

  // Perform some text mode operations指定文件存储为txt类型
  sftp.setTransferMode(SftpClient.MODE_TEXT);

  // Tell the client which EOL the remote client is using - note
  // that this will be ignored with version 4 of the protocol
  sftp.setRemoteEOL(SftpClient.EOL_LF);
  //将文件上传到服务器
  sftp.put(textFile.getAbsolutePath());
 }
}

写的不太详细，请参考：http://3sp.com/kb/idx/0/014/article/Getting_started_with_J2SSH_Maverick.html