Java实现FTP上传和下载

import java.io.ByteArrayInputStream;
import java.io.File;
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;

/**
 * <p>
 * Title: Adage_[子系统统名]_[模块名]
 * </p>
 * <p>
 * Description: [ftp上传下载文件]
 * </p>
 * 
 * @author benDaoRong
 * @version $Revision$ 2014-8-14
 * @author (lastest modification by $Author$)
 * @since 1.0
 */
public class FtpTest {
	/**
	 * <p>
	 * Discription:[上传文件到ftp服务器]
	 * </p>
	 * 
	 * @return
	 */
	public static boolean upload() {
		String url = "10.1.50.111";
		String username = "test";
		String password = "test";

		FTPClient client = new FTPClient();
		try {
			client.connect(url);
			client.login(username, password);
			int reply = client.getReplyCode();
			System.out.println("reoktCode:" + reply);
			//
			if (!FTPReply.isPositiveCompletion(reply)) {
				client.disconnect();
				return false;
			}
			client.changeWorkingDirectory("F:/FTPROOT");

			// 上传文件
			// FileInputStream fileInput = new FileInputStream("F:/Desktop/620.txt");
			// System.out.println("文件上传中，请耐心等待!");
			// client.storeFile(new String("620.txt".getBytes("UTF-8"), "iso-8859-1"), fileInput);
			// System.out.println("文件上传完成");
			// 在ftp服务器上新建一个文件，然后将输入流写入文件。
			InputStream input = new ByteArrayInputStream("今天测试ftp很成功111".getBytes());
			client.storeFile(new String("中文名2.txt".getBytes("UTF-8"), "iso-8859-1"), input);
			input.close();
		}
		catch (Exception e) {
			e.printStackTrace();
		}
		finally {
			if (client.isConnected()) {
				try {
					client.disconnect();
					System.out.println("关闭ftp连接");
				}
				catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return true;
	}

	/**
	 * <p>
	 * Discription:[从ftp服务器下载文件]
	 * </p>
	 */
	public static void download() {
		String url = "10.1.50.111";
		String username = "test";
		String password = "test";
		FTPClient client = new FTPClient();
		try {
			client.connect(url);
			client.login(username, password);
			int reply = client.getReplyCode();
			if (!FTPReply.isPositiveCompletion(reply)) {
				client.disconnect();
			}
			// 设置ftp根目录
			client.changeWorkingDirectory("F:/FTPROOT");
			// 下载文件
			FTPFile[] files = client.listFiles();
			if (files != null && files.length > 0) {
				for (FTPFile file : files) {
					String fileName = new String(file.getName().getBytes("iso-8859-1"), "UTF-8");
					// 本地文件存放目录
					String localName = System.currentTimeMillis() + "_" + fileName;
					OutputStream out = new FileOutputStream(new File("F:/Desktop/" + localName));
					client.retrieveFile(file.getName(), out);
					out.close();
					System.out.println("文件[" + fileName + "]下载成功");
				}
			}

			client.logout();
		}
		catch (Exception e) {
			e.printStackTrace();
		}
		finally {
			if (client.isConnected()) {
				try {
					client.disconnect();
				}
				catch (IOException e) {
					e.printStackTrace();
				}
			}
		}

	}

	public static void main(String[] args) {
		// upload();
		download();
	}
}