java实现FTP操作

 import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import sun.net.TelnetOutputStream;
import sun.net.TelnetInputStream;
import sun.net.ftp.FtpClient;
public class download ...{
    String localfilename;
    String remotefilename;
    FtpClient ftpClient;
    // server：服务器名字
    // user：用户名
    // password：密码
    // path：服务器上的路径
    public void connectServer(String ip, int port, String user,
            String password, String path) ...{
        try ...{
            ftpClient = new FtpClient();
            ftpClient.openServer(ip, port);
            ftpClient.login(user, password);
            System.out.println("login success!");
            if (path.length() != 0)
                ftpClient.cd(path);
            ftpClient.binary();
        } catch (IOException ex) ...{
            System.out.println("not login");
            System.out.println(ex);
        }
    }
    public void closeConnect() ...{
        try ...{
       &