java FTP上传文件，下载文件

package test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

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

public class FTPNet {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		/*String url = "192.168.0.210";
		int port = 21;
		String username = "";
		String password = "";
		String remotePath = "/ebsdev/baojia/";
		String fileName = "baojia.txt";
		String localPath = "D:/FTP";
		downloadFile(url, port, username, password, remotePath, fileName, localPath);*/
		try {
			File file = new File(
					"C:\\Documents and Settings\\qhchen\\桌面\\up_images\\");
			File[] listFile = file.listFiles();
			for (File f : listFile) {
				FileInputStream in = new FileInputStream(f);
				boolean flag = uploadFile("124.248.238.180", 21, "a328670733",
						"", "/a328670733/web/images/up_images/",
						f.getName(), in);
				if (flag) {
					System.out.println(f.getName() + "---> 上传成功！");
				} else {
					System.out.println(f.getName() + "---> 上传失败！");
				}
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
	}
	
	/**
	 * Description: 向FTP服务器上传文件
	 * @Version1.0 Jul 27, 2008 4:31:09 PM by 崔红保（[e-mail]）创建
	 * @param url FTP服务器hostname
	 * @param port FTP服务器端口
	 * @param username FTP登录账号
	 * @param password FTP登录密码
	 * @param path FTP服务器保存目录
	 * @param filename 上传到FTP服务器上的文件名
	 * @param input 输入流
	 * @return 成功返回true，否则返回false
	 */
	public static boolean uploadFile(String url,int port,String username, String password, String path, String filename, InputStream input) {
		boolean success = false;
		FTPClient ftp = new FTPClient();
		try {
			int reply;
			ftp.connect(url, port);//连接FTP服务器
			//如果采用默认端口，可以使用ftp.connect(url)的方式直接连接FTP服务器
			ftp.login(username, password);//登录
			reply = ftp.getReplyCode();
			if (!FTPReply.isPositiveCompletion(reply)) {
				ftp.disconnect();
				return success;
			}
			ftp.changeWorkingDirectory(path);
			ftp.storeFile(filename, input);			
			
			input.close();
			ftp.logout();
			success = true;
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (ftp.isConnected()) {
				try {
					ftp.disconnect();
				} catch (IOException ioe) {
				}
			}
		}
		return success;
	}
	
	/**  
	   * Description: 从FTP服务器下载文件  
	   * @Version1.0 Jul 27, 2008 5:32:36 PM by 崔红保（[e-mail]）创建  
	   * @param url FTP服务器hostname  
	   * @param port FTP服务器端口  
	   * @param username FTP登录账号  
	   * @param password FTP登录密码  
	   * @param remotePath FTP服务器上的相对路径  
	   * @param fileName 要下载的文件名  
	    * @param localPath 下载后保存到本地的路径  
	    * @return  
	    */  
	public static boolean downloadFile(String url, int port, String username,
			String password, String remotePath, String fileName,
			String localPath) {
		boolean success = false;
		FTPClient ftp = new FTPClient();
		try {
			int reply;

			// 连接FTP服务器
			if (port > -1) {
				ftp.connect(url, port);
			} else {
				ftp.connect(url);
			}

			ftp.login(username, password);// 登录
			reply = ftp.getReplyCode();
			if (!FTPReply.isPositiveCompletion(reply)) {
				ftp.disconnect();
				return success;
			}
			ftp.changeWorkingDirectory(remotePath);// 转移到FTP服务器目录
			FTPFile[] fs = ftp.listFiles();
			for (FTPFile ff : fs) {
				if (ff.getName().equals(fileName)) {
					File localFile = new File(localPath + "/" + ff.getName());

					OutputStream is = new FileOutputStream(localFile);
					ftp.retrieveFile(ff.getName(), is);
					is.close();
				}
			}

			ftp.logout();
			success = true;
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (ftp.isConnected()) {
				try {
					ftp.disconnect();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return success;
	}
}