java操作FTP

通过java与ftp服务器进行交互，费话少说代码如下

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.TimeZone;

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPReply;
import org.apache.log4j.Logger;

import com.sdjxd.commons.AppConfig;

public class FileUpLoad {
	private FTPClient ftpClient;// ftp客户端
	private String strIp;// ftp服务器地址
	private int intPort;// ftp端口
	private String user;// ftp用户
	private String password;// ftp密码
	private boolean isLogin = false;// 是否已登录
	private static Logger logger = Logger.getLogger(FileUpLoad.class);

	/***************************************************************************
	 * 
	 */
	public FileUpLoad() {
		this.strIp = AppConfig.getConfig("ftpServerIp");
		this.intPort = Integer.valueOf(AppConfig.getConfig("ftpServerPort"));
		this.user = AppConfig.getConfig("ftpUser");
		this.password = AppConfig.getConfig("ftpPassword");
		this.ftpClient = new FTPClient();
	}

	/**
	 * @return 判断是否登入成功
	 */
	public boolean ftpLogin() {
		boolean isLogin = false;
		FTPClientConfig ftpClientConfig = new FTPClientConfig();
		ftpClientConfig.setServerTimeZoneId(TimeZone.getDefault().getID());
		this.ftpClient.setControlEncoding("GBK");
		this.ftpClient.configure(ftpClientConfig);
		try {
			if (this.intPort > 0) {
				this.ftpClient.connect(this.strIp, this.intPort);
			} else {
				this.ftpClient.connect(this.strIp);
			}
			// FTP服务器连接回答
			int reply = this.ftpClient.getReplyCode();
			if (!FTPReply.isPositiveCompletion(reply)) {
				this.ftpClient.disconnect();
				logger.error("登录FTP服务失败！");
				return isLogin;
			}
			this.ftpClient.login(this.user, this.password);
			// 设置传输协议
			this.ftpClient.enterLocalPassiveMode();
			// 以二进制文件的形式上传，解决上传后文件大小改变问题
			this.ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
			logger.info("恭喜" + this.user + "成功登陆FTP服务器");
			isLogin = true;
		} catch (Exception e) {
			e.printStackTrace();
			logger.error(this.user + "登录FTP服务失败！" + e.getMessage());
		}
		this.ftpClient.setBufferSize(1024 * 2);
		this.ftpClient.setDataTimeout(30 * 1000);
		this.isLogin = isLogin;
		return isLogin;
	}

	/***************************************************************************
	 * 
	 * 退出关闭服务器链接
	 */
	public void ftpLogOut() {
		if (null != this.ftpClient && this.ftpClient.isConnected()) {
			try {
				boolean reuslt = this.ftpClient.logout();// 退出FTP服务器
				if (reuslt) {
					logger.info("成功退出服务器");
				}
			} catch (IOException e) {
				e.printStackTrace();
				logger.warn("退出FTP服务器异常！" + e.getMessage());
			} finally {
				try {
					this.ftpClient.disconnect();// 关闭FTP服务器的连接
				} catch (IOException e) {
					e.printStackTrace();
					logger.warn("关闭FTP服务器的连接异常！");
				}
			}
		}
	}

	/***************************************************************************
	 * 上传Ftp文件
	 * 
	 * @param localFile
	 *            本地文件
	 * @param ftpServerDir
	 *            上传服务器路径 - 应该以/结束
	 */
	public boolean uploadFile(File localFile, String ftpServerDir) {
		// 如果服务没有连接，先连接服务器
		if (!this.isLogin) {
			ftpLogin();
		}
		BufferedInputStream inStream = null;
		boolean success = false;
		try {
			boolean dirExists = this.ftpClient
					.changeWorkingDirectory(ftpServerDir);// 改变工作路径
			//检查是否存在，如果不存在则创建它
			if (dirExists) {
				logger.debug("更改服务器目录：" + ftpServerDir);
			} else {
				if (this.ftpClient.makeDirectory(ftpServerDir)) {
					logger.info(ftpServerDir + "目录创建成功！");
					this.ftpClient.changeWorkingDirectory(ftpServerDir);// 改变工作路径
				} else {
					logger.info(ftpServerDir + "服务器目录已存在，或没有创建权限，或其它原因没有创建成功！");
				}
			}
			inStream = new BufferedInputStream(new FileInputStream(localFile));
			logger.info(localFile.getName() + "开始上传.....");
			success = this.ftpClient.storeFile(localFile.getName(), inStream);
			if (success == true) {
				logger.info(localFile.getName() + "上传成功");
				return success;
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			logger.error(localFile + "未找到");
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (inStream != null) {
				try {
					inStream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return success;
	}

	/***************************************************************************
	 * 下载文件
	 * 
	 * @param remoteFileName
	 *            待下载文件名称
	 * @param localDires
	 *            下载到当地那个路径下
	 * @param remoteDownLoadPath
	 *            remoteFileName所在的路径
	 */

	public boolean downloadFile(String remoteFileName, String localDires,
			String remoteDownLoadPath) {
		// 如果服务没有连接，先连接服务器
		if (!this.isLogin) {
			ftpLogin();
		}
		String strFilePath = localDires + remoteFileName;
		BufferedOutputStream outStream = null;
		boolean success = false;
		try {
			this.ftpClient.changeWorkingDirectory(remoteDownLoadPath);
			outStream = new BufferedOutputStream(new FileOutputStream(
					strFilePath));
			logger.info(remoteFileName + "开始下载....");
			success = this.ftpClient.retrieveFile(remoteFileName, outStream);
			if (success == true) {
				logger.info(remoteFileName + "成功下载到" + strFilePath);
				return success;
			}
		} catch (Exception e) {
			e.printStackTrace();
			logger.error(remoteFileName + "下载失败");
		} finally {
			if (null != outStream) {
				try {
					outStream.flush();
					outStream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		if (success == false) {
			logger.error(remoteFileName + "下载失败!!!");
		}
		return success;
	}

}