Java_ftp_ftpclient下载文件

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.SocketException;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
/**
 * ftpclient下载文件
 */
public class Test {
  public static void main(String[] args) throws Exception {
    FTPClient ftpClient = new FTPClient();
    String hostName = "www.java2000.net";
    String userName = "username";
    String password = "password";
    String remoteDir = "/";
    try {
      ftpClient.connect(hostName, 21);
      ftpClient.setControlEncoding("UTF-8");
      ftpClient.login(userName, password);
      ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
      FTPFile[] files = ftpClient.listFiles(remoteDir);
      for (int i = 0; i < files.length; i++) {
        System.out.println(files[i].getName());
      }
      File file = new File("d://index.jsp");
      FileOutputStream fos = new FileOutputStream(file);
      ftpClient.retrieveFile(remoteDir + "/index.jsp", fos);
      fos.close();
    } catch (SocketException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}