本文介紹了如何使用Apache Jakarta Commons Net（commons-net-3.3.jar）基于FileZilla Server服務(wù)器實現(xiàn)FTP服務(wù)器上文件的上傳/下載/刪除等操作，需要的朋友可以參考下

對于使用文件進行交換數(shù)據(jù)的應(yīng)用來說，使用FTP 服務(wù)器是一個很不錯的解決方案。

關(guān)于FileZilla Server服務(wù)器的詳細(xì)搭建配置過程，詳情請見FileZilla Server安裝配置教程。之前有朋友說，上傳大文件（幾百M以上的文件）到FTP服務(wù)器時會重現(xiàn)無法重命名的問題，但本人親測上傳2G的文件到FileZilla Server都沒有該問題，朋友們可以放心使用該代碼。

FavFTPUtil.Java

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package com.favccxx.favsoft.util; ?? 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 org.apache.commons.net.ftp.FTPClient; import org.apache.commons.net.ftp.FTPFile; import org.apache.commons.net.ftp.FTPReply; ?? public class FavFTPUtil { ???? ??/** ???* 上傳文件（可供Action/Controller層使用） ???* @param hostname FTP服務(wù)器地址 ???* @param port? FTP服務(wù)器端口號 ???* @param username? FTP登錄帳號 ???* @param password? FTP登錄密碼 ???* @param pathname? FTP服務(wù)器保存目錄 ???* @param fileName? 上傳到FTP服務(wù)器后的文件名稱 ???* @param inputStream 輸入文件流 ???* @return ???*/ ??public static boolean uploadFile(String hostname, int port, String username, String password, String pathname, String fileName, InputStream inputStream){ ????boolean flag = false; ????FTPClient ftpClient = new FTPClient(); ????ftpClient.setControlEncoding("UTF-8"); ????try { ??????//連接FTP服務(wù)器 ??????ftpClient.connect(hostname, port); ??????//登錄FTP服務(wù)器 ??????ftpClient.login(username, password); ??????//是否成功登錄FTP服務(wù)器 ??????int replyCode = ftpClient.getReplyCode(); ??????if(!FTPReply.isPositiveCompletion(replyCode)){ ????????return flag; ??????} ???????? ??????ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); ??????ftpClient.makeDirectory(pathname); ??????ftpClient.changeWorkingDirectory(pathname); ??????ftpClient.storeFile(fileName, inputStream); ??????inputStream.close(); ??????ftpClient.logout(); ??????flag = true; ????} catch (Exception e) { ??????e.printStackTrace(); ????} finally{ ??????if(ftpClient.isConnected()){ ????????try { ??????????ftpClient.disconnect(); ????????} catch (IOException e) { ??????????e.printStackTrace(); ????????} ??????} ????} ????return flag; ??} ???? ???? ??/** ???* 上傳文件（可對文件進行重命名） ???* @param hostname FTP服務(wù)器地址 ???* @param port? FTP服務(wù)器端口號 ???* @param username? FTP登錄帳號 ???* @param password? FTP登錄密碼 ???* @param pathname? FTP服務(wù)器保存目錄 ???* @param filename? 上傳到FTP服務(wù)器后的文件名稱 ???* @param originfilename 待上傳文件的名稱（絕對地址） ???* @return ???*/ ??public static boolean uploadFileFromProduction(String hostname, int port, String username, String password, String pathname, String filename, String originfilename){ ????boolean flag = false; ????try { ??????InputStream inputStream = new FileInputStream(new File(originfilename)); ??????flag = uploadFile(hostname, port, username, password, pathname, filename, inputStream); ????} catch (Exception e) { ??????e.printStackTrace(); ????} ????return flag; ??} ???? ??/** ???* 上傳文件（不可以進行文件的重命名操作） ???* @param hostname FTP服務(wù)器地址 ???* @param port? FTP服務(wù)器端口號 ???* @param username? FTP登錄帳號 ???* @param password? FTP登錄密碼 ???* @param pathname? FTP服務(wù)器保存目錄 ???* @param originfilename 待上傳文件的名稱（絕對地址） ???* @return ???*/ ??public static boolean uploadFileFromProduction(String hostname, int port, String username, String password, String pathname, String originfilename){ ????boolean flag = false; ????try { ??????String fileName = new File(originfilename).getName(); ??????InputStream inputStream = new FileInputStream(new File(originfilename)); ??????flag = uploadFile(hostname, port, username, password, pathname, fileName, inputStream); ????} catch (Exception e) { ??????e.printStackTrace(); ????} ????return flag; ??} ???? ???? ??/** ???* 刪除文件 ???* @param hostname FTP服務(wù)器地址 ???* @param port? FTP服務(wù)器端口號 ???* @param username? FTP登錄帳號 ???* @param password? FTP登錄密碼 ???* @param pathname? FTP服務(wù)器保存目錄 ???* @param filename? 要刪除的文件名稱 ???* @return ???*/ ??public static boolean deleteFile(String hostname, int port, String username, String password, String pathname, String filename){ ????boolean flag = false; ????FTPClient ftpClient = new FTPClient(); ????try { ??????//連接FTP服務(wù)器 ??????ftpClient.connect(hostname, port); ??????//登錄FTP服務(wù)器 ??????ftpClient.login(username, password); ??????//驗證FTP服務(wù)器是否登錄成功 ??????int replyCode = ftpClient.getReplyCode(); ??????if(!FTPReply.isPositiveCompletion(replyCode)){ ????????return flag; ??????} ??????//切換FTP目錄 ??????ftpClient.changeWorkingDirectory(pathname); ??????ftpClient.dele(filename); ??????ftpClient.logout(); ??????flag = true; ????} catch (Exception e) { ??????e.printStackTrace(); ????} finally{ ??????if(ftpClient.isConnected()){ ????????try { ??????????ftpClient.logout(); ????????} catch (IOException e) { ?????????? ????????} ??????} ????} ????return flag; ??} ???? ??/** ???* 下載文件 ???* @param hostname FTP服務(wù)器地址 ???* @param port? FTP服務(wù)器端口號 ???* @param username? FTP登錄帳號 ???* @param password? FTP登錄密碼 ???* @param pathname? FTP服務(wù)器文件目錄 ???* @param filename? 文件名稱 ???* @param localpath 下載后的文件路徑 ???* @return ???*/ ??public static boolean downloadFile(String hostname, int port, String username, String password, String pathname, String filename, String localpath){ ????boolean flag = false; ????FTPClient ftpClient = new FTPClient(); ????try { ??????//連接FTP服務(wù)器 ??????ftpClient.connect(hostname, port); ??????//登錄FTP服務(wù)器 ??????ftpClient.login(username, password); ??????//驗證FTP服務(wù)器是否登錄成功 ??????int replyCode = ftpClient.getReplyCode(); ??????if(!FTPReply.isPositiveCompletion(replyCode)){ ????????return flag; ??????} ??????//切換FTP目錄 ??????ftpClient.changeWorkingDirectory(pathname); ??????FTPFile[] ftpFiles = ftpClient.listFiles(); ??????for(FTPFile file : ftpFiles){ ????????if(filename.equalsIgnoreCase(file.getName())){ ??????????File localFile = new File(localpath + "/" + file.getName()); ??????????OutputStream os = new FileOutputStream(localFile); ??????????ftpClient.retrieveFile(file.getName(), os); ??????????os.close(); ????????} ??????} ??????ftpClient.logout(); ??????flag = true; ????} catch (Exception e) { ??????e.printStackTrace(); ????} finally{ ??????if(ftpClient.isConnected()){ ????????try { ??????????ftpClient.logout(); ????????} catch (IOException e) { ?????????? ????????} ??????} ????} ????return flag; ??} ?? }

FavFTPUtilTest.java

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package com.favccxx.favsoft.util; ?? import junit.framework.TestCase; ?? public class FavFTPTest extends TestCase { ???? ??public void testFavFTPUtil(){ ????String hostname = "127.0.0.1"; ????int port = 21; ????String username = "business"; ????String password = "business"; ????String pathname = "business/ebook"; ????String filename = "big.rar"; ????String originfilename = "C:\\Users\\Downloads\\Downloads.rar"; ????FavFTPUtil.uploadFileFromProduction(hostname, port, username, password, pathname, filename, originfilename); //?? String localpath = "D:/"; ?????? //?? FavFTPUtil.downloadFile(hostname, port, username, password, pathname, filename, localpath); ??} ?? }

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轉(zhuǎn)載于:https://www.cnblogs.com/wxseng/p/9479574.html

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