怎么实现用java下载多个ftp文件

package ftpdownload;



import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.net.SocketException;



import org.apache.commons.logging.Log; 

import org.apache.commons.logging.LogFactory;

import org.apache.commons.net.ftp.FTPClient;

import org.apache.commons.net.ftp.FTPReply;



public class FtpUtil {

	private final static Log logger=LogFactory.getLog(FtpUtil.class);

	

	/** 

     * 获取FTPClient对象 

     * 

     * @param ftpHost 

     *            FTP主机服务器 

     * @param ftpPassword 

     *            FTP 登录密码 

     * @param ftpUserName 

     *            FTP登录用户名 

     * @return 

     */  

	public static FTPClient getFTPClient(String ftpHost,String ftpUsername,String ftpPassword){

		FTPClient ftpClient=new FTPClient();

		try {

			ftpClient=new FTPClient();

			ftpClient.connect(ftpHost);// 连接FTP服务器 

			ftpClient.login(ftpUsername, ftpPassword);// 登陆FTP服务器 

			if(!FTPReply.isPositiveCompletion(ftpClient.getReplyCode())){

				logger.info("未连接到FTP，用户名或密码错误。");

				ftpClient.disconnect();

			}else{

				logger.info("FTP连接成功。");

			}

		} catch (SocketException e) {

			e.printStackTrace();

			logger.info("FTP的IP地址可能错误，请正确配置。");

		} catch (IOException e) {

			e.printStackTrace();

			logger.info("FTP的端口错误,请正确配置。");

		}

		return ftpClient;

	}

	

	/* 

     * 从FTP服务器下载文件 

     *  

     * @param ftpHost FTP IP地址 

     *  

     * @param ftpUserName FTP 用户名 

     *  

     * @param ftpPassword FTP用户名密码 

     *  

     * @param ftpPath FTP服务器中文件所在路径

     *  

     * @param localPath 下载到本地的位置

     *  

     * @param fileName 文件名称 

     */  

	public static void downloadFtpFile(String ftpHost,String ftpUsername,String ftpPassword,String ftpPath,String localPath,String fileName){

		FTPClient ftpClient=null;

		try {

			ftpClient=getFTPClient(ftpHost, ftpUsername, ftpPassword);

			ftpClient.setControlEncoding("UTF-8");

			ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);

			ftpClient.enterLocalPassiveMode();

			ftpClient.changeWorkingDirectory(ftpPath);

			

			File localFile=new File(localPath+File.separatorChar+fileName);

			OutputStream os=new FileOutputStream(localFile);

			ftpClient.retrieveFile(fileName, os);

			os.close();

			ftpClient.logout();

		} catch (FileNotFoundException e) {

			logger.error("没有找到" + ftpPath + "文件");

			e.printStackTrace();

		} catch (SocketException e) {

			logger.error("连接FTP失败");

			e.printStackTrace();

		} catch (IOException e) {

			e.printStackTrace();

			logger.error("文件读取错误");

			e.printStackTrace();

		}

	}

}

package ftpdownload;



import org.testng.annotations.Test;



public class FtpDownloadTestScript {

	

	public static void main(String[] args) {

		

		String ftpHost="132.225.132.73";

		String ftpUsername="ftpuser";

		String ftpPassword="ftp2016";

		String ftpPath="esbdata/JS/ShengWangGuan/";

		String localPath="D:/csv";

		String fileName="*.csv";

		FtpUtil.downloadFtpFile(ftpHost, ftpUsername, ftpPassword, ftpPath, localPath, fileName);

		

	}

}