java ftp工具类

/** * 创建于:2015年11月18日 下午3:48:31 * 所属项目: * 文件名称:FtpUtil.java * 作者:test * 版权信息: */package ftp;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.SocketException;import org.apache.commons.net.ftp.FTP;import org.apache.commons.net.ftp.FTPClient;import org.apache.commons.net.ftp.FTPFile;import org.apache.commons.net.ftp.FTPReply;import org.apache.log4j.Logger;/** * Ftp工具类（未测试） *  * @history 2015年11月18日 下午5:37:30 * @author test * @version 0.1.0 */public class FtpUtil {private static Logger logger = Logger.getLogger(FtpUtil.class);/** * 连接到ftp服务器 * @param ip * @param port * @param userName * @param userPwd * @param path */public void connectServer(String ip, int port, String userName, String userPwd, String path) {FTPClient ftpClient = new FTPClient();try {// 连接ftpClient.connect(ip, port);if(FTPReply.isPositiveCompletion(ftpClient.getReplyCode())){  // 登录ftpClient.login(userName, userPwd);if (path != null && path.length() > 0) {// 跳转到指定目录ftpClient.changeWorkingDirectory(path);}}} catch (SocketException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}/** * 关闭ftp连接 * @param ftpClient */public void disconnect(FTPClient ftpClient) {if (ftpClient.isConnected()) {try {ftpClient.logout();ftpClient.disconnect();} catch (IOException e) {e.printStackTrace();}}}/** * 读取指定目录下的文件名 * @param path * @param ftpClient * @return */public FTPFile[] listFiles(String path, FTPClient ftpClient) {try {return ftpClient.listFiles(path);} catch (IOException e) {e.printStackTrace();}return null;}/** * 下载文件 * @param directory 服务器文件路径 * @param downloadFile 服务器文件名称 * @param saveFile 本地保存的文件名称 * @param ftpClient FTPClient */public void download(String directory, String downloadFile, String saveFile, FTPClient ftpClient){try {if(directory != null && !"".equals(directory)){ftpClient.changeWorkingDirectory(directory);}ftpClient.enterLocalPassiveMode();          ftpClient.setFileType(FTP.BINARY_FILE_TYPE);                  FTPFile[] files = ftpClient.listFiles(downloadFile);         if(files.length != 1){              logger.error(downloadFile + "远程文件不唯一");            return;          }          File file = new File(saveFile);        long lRemoteSize = files[0].getSize();          if(file.exists()){              OutputStream out = new FileOutputStream(file);              logger.info("本地" + saveFile + "文件大小为:" + file.length());              if(file.length() >= lRemoteSize){              logger.info("本地文件大小大于远程文件大小，下载中止");             out.close();            return;            }              ftpClient.setRestartOffset(file.length());              ftpClient.retrieveFile(downloadFile, out);              out.close();          }else {              OutputStream out = new FileOutputStream(file);              ftpClient.retrieveFile(downloadFile, out);              out.close();          }  } catch (IOException e) {e.printStackTrace();}}/** * 上传文件 * @param uploadFile 本地上传文件名 * @param remote 服务器文件名 * @param ftpClient FTPClient * @throws IOException */public void upload(String uploadFile, String remote, FTPClient ftpClient) throws IOException{          //设置PassiveMode传输          ftpClient.enterLocalPassiveMode();          //设置以二进制流的方式传输          ftpClient.setFileType(FTP.BINARY_FILE_TYPE);          //对远程目录的处理          String remoteFileName = remote;          if(remote.contains("/")){              remoteFileName = remote.substring(remote.lastIndexOf("/")+1);              String directory = remote.substring(0, remote.lastIndexOf("/") + 1);              if(!directory.equalsIgnoreCase("/") && !ftpClient.changeWorkingDirectory(directory)){                  //如果远程目录不存在，则递归创建远程服务器目录              mkDirectory(directory, ftpClient);            }          }                    //检查远程是否存在文件          FTPFile[] files = ftpClient.listFiles(remoteFileName);          if(files.length == 1){              long remoteSize = files[0].getSize();              File f = new File(uploadFile);              long localSize = f.length();              if(remoteSize == localSize){              logger.info(uploadFile + "文件已存在");                return;              }else if(remoteSize > localSize){              logger.info(uploadFile + "远程文件大于本地文件大小，上传终止");                return;              }                            InputStream is = null;            try{            //尝试移动文件内读取指针,实现断点续传              is = new FileInputStream(f);              if(is.skip(remoteSize) == remoteSize){                  ftpClient.setRestartOffset(remoteSize);                  if(ftpClient.storeFile(remote, is)){                logger.info(uploadFile + "文件上传成功");                    return;                  }              }                            //如果断点续传没有成功，则删除服务器上文件，重新上传              if(!ftpClient.deleteFile(remoteFileName)){              logger.info(remoteFileName + "远程文件删除失败");                return;              }              if(ftpClient.storeFile(remote, is)){               logger.info(remoteFileName + "文件上传成功");            }else{              logger.info(remoteFileName + "文件上传失败");            }              }finally{            if(is != null){            is.close();              }            }        }else {          // 远程文件不存在，直接上传            InputStream is = new FileInputStream(uploadFile);              if(ftpClient.storeFile(remoteFileName, is)){              logger.info(remoteFileName + "文件上传成功");            }else{              logger.info(remoteFileName + "文件上传失败");            }              is.close();          }      }  /** * 创建目录 * @param directory 路径名 * @param ftpClient * @throws IOException */private void mkDirectory(String directory, FTPClient ftpClient) throws IOException{int start=0;          int end = 0;          if(directory.startsWith("/")){              start = 1;          }else{              start = 0;          }          end = directory.indexOf("/", start);          while(true){              String subDirectory = directory.substring(start,end);              if(!ftpClient.changeWorkingDirectory(subDirectory)){                  if(ftpClient.makeDirectory(subDirectory)){                      ftpClient.changeWorkingDirectory(subDirectory);                  }else {                      logger.info("创建" + subDirectory + "目录失败");                    return;                  }              }                            start = end + 1;              end = directory.indexOf("/", start);                            //检查所有目录是否创建完毕              if(end <= start){                  break;              }          }  }}