liunx實現FTP下載功能

時間 2019-11-07

標籤 liunx 實現 ftp 下載功能欄目 Linux 简体版

原文原文鏈接

1.因爲liunx服務器沒法實現http協議的訪問，因此沒法直接讀取視頻，從而也沒法運用httpurl實現爬蟲抓取，因此百度整合了一個ftp下載的工具類，侵刪。java

package com.itsht.adapter.socket;apache

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;服務器

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;socket

public class Ftpdownload {
   /**
   * Description: 從FTP服務器下載文件
   *
   * @Version. Jul , :: PM by 崔紅保（cuihongbao@d-heaven.com）建立
   * @param url
   * FTP服務器hostname
   * @param port
   * FTP服務器端口
   * @param username
   * FTP登陸帳號
   * @param password
   * FTP登陸密碼
   * @param remotePath
   * FTP服務器上的相對路徑
   * @param fileName
   * 要下載的文件名
   * @param localPath
   * 下載後保存到本地的路徑
   * @return
   */
   public static boolean downFile(String url, int port, String username,
           String password, String remotePath, String fileName,
           String localPath) {
       boolean success = false;
       FTPClient ftp = new FTPClient();
       try {
           int reply;
           ftp.connect(url, port);
           // 若是採用默認端口，能夠使用ftp.connect(url)的方式直接鏈接FTP服務器
           ftp.login(username, password);// 登陸
           reply = ftp.getReplyCode();
           if (!FTPReply.isPositiveCompletion(reply)) {
               ftp.disconnect();
               return success;
           }
           ftp.changeWorkingDirectory(remotePath);// 轉移到FTP服務器目錄
           FTPFile[] fs = ftp.listFiles();
           for (FTPFile ff : fs) {
               if (ff.getName().equals(fileName)) {
                   File localFile = new File(localPath + "/" + ff.getName());
                   OutputStream is = new FileOutputStream(localFile);
                   ftp.retrieveFile(ff.getName(), is);
                   is.close();
               }
           }
           ftp.logout();
           success = true;
       } catch (IOException e) {
           e.printStackTrace();
       } finally {
           if (ftp.isConnected()) {
               try {
                   ftp.disconnect();
               } catch (IOException ioe) {
               }
           }
       }
       return success;
   }


   public static void main(String[] args) {
       String ftpurl = "ftp://road:road@192.168.9.53/detectdata/video/00/00/01.mp4";

       String url = ftpurl.substring(ftpurl.indexOf("@")+1,ftpurl.indexOf("/",ftpurl.indexOf("/",ftpurl.indexOf("/")+1)+1));
       int port = 21;
       String username = ftpurl.substring(ftpurl.indexOf("/",ftpurl.indexOf("/")+1)+1,ftpurl.indexOf(":",ftpurl.indexOf(":")+1));
       String password = ftpurl.substring(ftpurl.indexOf(":",ftpurl.indexOf(":")+1)+1,ftpurl.indexOf("@"));
       String remotePath = ftpurl.substring(ftpurl.indexOf("/",ftpurl.indexOf("/",ftpurl.indexOf("/")+1)+1),ftpurl.lastIndexOf("/"));
       String fileName = ftpurl.substring(ftpurl.lastIndexOf("/")+1,ftpurl.length());
       String localPath = "";

       downFile(url, port, username, password, remotePath, fileName, localPath);
   }














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