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.MalformedURLException; 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; public class FtpUtils { // ftp服务器地址 public String hostname = "10.0.46.138"; // ftp服务器端口号默认为21 public Integer port = 21; // ftp登录账号 public String username = "ftptest"; // ftp登录密码 public String password = "ftptest"; public FTPClient ftpClient = null; /** * 初始化ftp服务器 */ public void initFtpClient() { ftpClient = new FTPClient(); ftpClient.setControlEncoding("utf-8"); try { System.out.println("connecting...ftp服务器:" + this.hostname + ":" + this.port); ftpClient.connect(hostname, port); // 连接ftp服务器 ftpClient.login(username, password); // 登录ftp服务器 int replyCode = ftpClient.getReplyCode(); // 是否成功登录服务器 if (!FTPReply.isPositiveCompletion(replyCode)) { System.out.println("connect failed...ftp服务器:" + this.hostname + ":" + this.port); }else{ System.out.println("connect successfu...ftp服务器:" + this.hostname + ":" + this.port); } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } /** * 上传文件 * * @param pathname * ftp服务保存地址 * @param fileName * 上传到ftp的文件名 * @param originfilename * 待上传文件的名称（绝对地址） * * @return */ public boolean uploadFile(String pathname, String fileName, String originfilename) { InputStream inputStream = null; try { System.out.println("开始上传文件"); inputStream = new FileInputStream(new File(originfilename)); initFtpClient(); ftpClient.setFileType(FTP.BINARY_FILE_TYPE); CreateDirecroty(pathname); ftpClient.makeDirectory(pathname); ftpClient.changeWorkingDirectory(pathname); ftpClient.setControlEncoding("UTF-8"); // 每次数据连接之前，ftp client告诉ftp server开通一个端口来传输数据 ftpClient.enterLocalPassiveMode(); // 观察是否真的上传成功 boolean storeFlag = ftpClient.storeFile(fileName, inputStream); System.err.println("storeFlag==" + storeFlag); inputStream.close(); ftpClient.logout(); System.out.println("上传文件成功"); } catch (Exception e) { System.out.println("上传文件失败"); e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } if (null != inputStream) { try { inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } return true; } /** * 上传文件 * * @param pathname * ftp服务保存地址 * @param fileName * 上传到ftp的文件名 * @param inputStream * 输入文件流 * @return */ public boolean uploadFile(String pathname, String fileName, InputStream inputStream) { try { System.out.println("开始上传文件"); initFtpClient(); ftpClient.setFileType(FTP.BINARY_FILE_TYPE); CreateDirecroty(pathname); ftpClient.makeDirectory(pathname); ftpClient.changeWorkingDirectory(pathname); ftpClient.storeFile(fileName, inputStream); inputStream.close(); ftpClient.logout(); System.out.println("上传文件成功"); } catch (Exception e) { System.out.println("上传文件失败"); e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } if (null != inputStream) { try { inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } return true; } // 改变目录路径 public boolean changeWorkingDirectory(String directory) { boolean flag = true; try { flag = ftpClient.changeWorkingDirectory(directory); if (flag) { System.out.println("进入文件夹" + directory + " 成功！"); } else { System.out.println("进入文件夹" + directory + " 失败！开始创建文件夹"); } } catch (IOException ioe) { ioe.printStackTrace(); } return flag; } // 创建多层目录文件，如果有ftp服务器已存在该文件，则不创建，如果无，则创建 public boolean CreateDirecroty(String remote) throws IOException { boolean success = true; String directory = remote + "/"; // 如果远程目录不存在，则递归创建远程服务器目录 if (!directory.equalsIgnoreCase("/") && !changeWorkingDirectory(new String(directory))) { int start = 0; int end = 0; if (directory.startsWith("/")) { start = 1; } else { start = 0; } end = directory.indexOf("/", start); String path = ""; String paths = ""; while (true) { String subDirectory = new String(remote.substring(start, end).getBytes("GBK"), "iso-8859-1"); path = path + "/" + subDirectory; if (!existFile(path)) { if (makeDirectory(subDirectory)) { changeWorkingDirectory(subDirectory); } else { System.out.println("创建目录[" + subDirectory + "]失败"); changeWorkingDirectory(subDirectory); } } else { changeWorkingDirectory(subDirectory); } paths = paths + "/" + subDirectory; start = end + 1; end = directory.indexOf("/", start); // 检查所有目录是否创建完毕 if (end <= start) { break; } } } return success; } // 判断ftp服务器文件是否存在 public boolean existFile(String path) throws IOException { boolean flag = false; FTPFile[] ftpFileArr = ftpClient.listFiles(path); if (ftpFileArr.length > 0) { flag = true; } return flag; } // 创建目录 public boolean makeDirectory(String dir) { boolean flag = true; try { flag = ftpClient.makeDirectory(dir); if (flag) { System.out.println("创建文件夹" + dir + " 成功！"); } else { System.out.println("创建文件夹" + dir + " 失败！"); } } catch (Exception e) { e.printStackTrace(); } return flag; } /** * * 下载文件 * * * @param pathname * FTP服务器文件目录 * * @param filename * 文件名称 * * @param localpath * 下载后的文件路径 * * @return */ public boolean downloadFile(String pathname, String filename, String localpath) { boolean flag = false; OutputStream os = null; try { System.out.println("开始下载文件"); initFtpClient(); // 切换FTP目录 boolean changeFlag = ftpClient.changeWorkingDirectory(pathname); System.err.println("changeFlag==" + changeFlag); ftpClient.enterLocalPassiveMode(); ftpClient.setRemoteVerificationEnabled(false); // 查看有哪些文件夹 以确定切换的ftp路径正确 String[] a = ftpClient.listNames(); System.err.println(a[0]); FTPFile[] ftpFiles = ftpClient.listFiles(); for (FTPFile file : ftpFiles) { if (filename.equalsIgnoreCase(file.getName())) { File localFile = new File(localpath + "/" + file.getName()); os = new FileOutputStream(localFile); ftpClient.retrieveFile(file.getName(), os); os.close(); } } ftpClient.logout(); flag = true; System.out.println("下载文件成功"); } catch (Exception e) { System.out.println("下载文件失败"); e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } if (null != os) { try { os.close(); } catch (IOException e) { e.printStackTrace(); } } } return flag; } /** * * 删除文件 * * * @param pathname * FTP服务器保存目录 * * @param filename * 要删除的文件名称 * * @return */ public boolean deleteFile(String pathname, String filename) { boolean flag = false; try { System.out.println("开始删除文件"); initFtpClient(); // 切换FTP目录 ftpClient.changeWorkingDirectory(pathname); ftpClient.dele(filename); ftpClient.logout(); flag = true; System.out.println("删除文件成功"); } catch (Exception e) { System.out.println("删除文件失败"); e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } } return flag; } public static void main(String[] args) { FtpUtils ftp = new FtpUtils(); // 文件路径写为用户建立时 指定的目录 //ftp.uploadFile("/home/ftptest/var/ftp/pub/test", "adt-bundle-windows-x86_64-20140702.rar", "E://chart/adt-bundle-windows-x86_64-20140702.rar"); //ftp.downloadFile("/home/ftptest/var/ftp/pub/test", "hongmenci.png", "E://"); ftp.deleteFile("/home/ftptest/var/ftp/pub/test", "adt-bundle-windows-x86_64-20140702.rar"); //System.out.println("ok"); } }
下载
commons.netjar包即可