直接上代码：
import org.apache.commons.net.ftp.FTPClient; import org.apache.commons.net.ftp.FTPClientConfig; import org.apache.commons.net.ftp.FTPFile; import org.apache.commons.net.ftp.FTPReply; import org.apache.log4j.Logger; import java.io.*; import java.text.SimpleDateFormat; import java.util.*; import java.util.stream.Collectors; public class FTPUtils { private FTPClient ftpClient; private String strIp; private int intPort; private String user; private String password; private static Logger logger = Logger.getLogger(FTPUtils.class.getName()); public FTPUtils(String strIp, int intPort, String user, String Password) { this.strIp = strIp; this.intPort = intPort; this.user = user; this.password = Password; 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(); 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); 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 当地文件 * @param - 应该以/结束 * */ public boolean uploadFile(File localFile, String remoteUpLoadPath) { BufferedInputStream inStream = null; boolean success = false; try { this.ftpClient.changeWorkingDirectory(remoteUpLoadPath);// 改变工作路径 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; } public void downloadFile(FTPFile file, String localDir, String remoteDownLoadPath) { String strFilePath = localDir + file.getName(); BufferedOutputStream outStream = null; boolean success = false; try { this.ftpClient.changeWorkingDirectory(remoteDownLoadPath); outStream = new BufferedOutputStream(new FileOutputStream( strFilePath)); success = this.ftpClient.retrieveFile(file.getName(), outStream); if (success == true) { logger.info(file.getName() + "--成功下载到--" + strFilePath); } } catch (Exception e) { e.printStackTrace(); } finally { if (null != outStream) { try { outStream.flush(); outStream.close(); } catch (IOException e) { e.printStackTrace(); } } } if (success == false) { logger.error(file.getName() + "下载失败!!!"); } } /*** * @上传文件夹 * @param localDirectory * 当地文件夹 * @param remoteDirectoryPath * Ftp 服务器路径 以目录"/"结束 * */ public boolean uploadDirectory(String localDirectory, String remoteDirectoryPath) { File src = new File(localDirectory); try { remoteDirectoryPath = remoteDirectoryPath + src.getName() + "/"; boolean makeDirFlag = this.ftpClient.makeDirectory(remoteDirectoryPath); System.out.println("localDirectory : " + localDirectory); System.out.println("remoteDirectoryPath : " + remoteDirectoryPath); System.out.println("src.getName() : " + src.getName()); System.out.println("remoteDirectoryPath : " + remoteDirectoryPath); System.out.println("makeDirFlag : " + makeDirFlag); // ftpClient.listDirectories(); } catch (IOException e) { e.printStackTrace(); logger.info(remoteDirectoryPath + "目录创建失败"); } File[] allFile = src.listFiles(); for (int currentFile = 0; currentFile < allFile.length; currentFile++) { if (!allFile[currentFile].isDirectory()) { String srcName = allFile[currentFile].getPath().toString(); uploadFile(new File(srcName), remoteDirectoryPath); } } for (int currentFile = 0; currentFile < allFile.length; currentFile++) { if (allFile[currentFile].isDirectory()) { // 递归 uploadDirectory(allFile[currentFile].getPath().toString(), remoteDirectoryPath); } } return true; } public boolean isDirectory(String a) { if ("..".equals(a)) { return false; } else if (".".equals(a)) { return false; } else return true; } public int getFileListLength(String remoteDirectory) throws IOException { FTPFile[] allFile = this.ftpClient.listFiles(remoteDirectory); List<FTPFile> list = Arrays.stream(allFile).filter( file -> isDirectory(file.getName())).collect(Collectors.toList()); for (FTPFile file : list) { logger.info(file.getName() + "---" + file.getType()); logger.info("..".equals(file.getName())); } return list.size(); } /*** * @下载文件夹 * @param * @param remoteDirectory 远程文件夹 * */ public boolean downLoadDirectory(String localDirectoryPath, String remoteDirectory) { try { String fileName = new File(remoteDirectory).getName(); localDirectoryPath = localDirectoryPath + fileName + "\\"; new File(localDirectoryPath).mkdirs(); FTPFile[] allFile = this.ftpClient.listFiles(remoteDirectory); logger.info("总文件的个数" + allFile.length); for (FTPFile file : allFile) { logger.info(file.getName() + "---" + file.getType()); } List<FTPFile> list = Arrays.stream(allFile).filter( file -> isDirectory(file.getName())).collect(Collectors.toList()); SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd"); Calendar calendar=Calendar.getInstance(); calendar.setTime(new Date()); calendar.add(Calendar.DATE,-1); for (FTPFile file : list) { if (!file.isDirectory()) { if (!sdf.format(calendar.getTime()).equals(file.getName().substring(15, 23))) continue; downloadFile(file, localDirectoryPath, remoteDirectory); } } for (FTPFile file : list) { if (file.isDirectory()) { String strremoteDirectoryPath = remoteDirectory + "\\" + file.getName(); downLoadDirectory(localDirectoryPath, strremoteDirectoryPath); } } } catch (IOException e) { e.printStackTrace(); logger.info("下载文件夹失败"); return false; } return true; } // FtpClient的Set 和 Get 函数 public FTPClient getFtpClient() { return ftpClient; } public void setFtpClient(FTPClient ftpClient) { this.ftpClient = ftpClient; } }