首页 > 代码库 > Java实现FTP文件与文件夹的上传和下载1
Java实现FTP文件与文件夹的上传和下载1
Java实现FTP文件与文件夹的上传和下载 http://www.cnblogs.com/winorgohome/archive/2016/11/22/6088013.html
FTP 是File Transfer Protocol（文件传输协议）的英文简称，而中文简称为“文传协议”。用于Internet上的控制文件的双向传输。同时，它也是一个应用程序（Application）。基于不同的操作系统有不同的FTP应用程序，而所有这些应用程序都遵守同一种协议以传输文件。在FTP的使用当中，用户经常遇到两个概念："下载"（Download）和"上传"（Upload）。"下载"文件就是从远程主机拷贝文件至自己的计算机上；"上传"文件就是将文件从自己的计算机中拷贝至远程主机上。用Internet语言来说，用户可通过客户机程序向（从）远程主机上传（下载）文件。
首先下载了Serv-U将自己的电脑设置为了FTP文件服务器，方便操作。下面代码的使用都是在FTP服务器已经创建，并且要在代码中写好FTP连接的相关数据才可以完成。
1.FTP文件的上传与下载(注意是单个文件的上传与下载)
import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;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;/** * 实现FTP文件上传和文件下载 */public class FtpApche { private static FTPClient ftpClient = new FTPClient(); private static String encoding = System.getProperty("file.encoding"); /** * Description: 向FTP服务器上传文件 * * @Version1.0 * @param url * FTP服务器hostname * @param port * FTP服务器端口 * @param username * FTP登录账号 * @param password * FTP登录密码 * @param path * FTP服务器保存目录,如果是根目录则为“/” * @param filename * 上传到FTP服务器上的文件名 * @param input * 本地文件输入流 * @return 成功返回true，否则返回false */ public static boolean uploadFile(String url, int port, String username, String password, String path, String filename, InputStream input) { boolean result = false; try { int reply; // 如果采用默认端口，可以使用ftp.connect(url)的方式直接连接FTP服务器 ftpClient.connect(url); // ftp.connect(url, port);// 连接FTP服务器 // 登录 ftpClient.login(username, password); ftpClient.setControlEncoding(encoding); // 检验是否连接成功 reply = ftpClient.getReplyCode(); if (!FTPReply.isPositiveCompletion(reply)) { System.out.println("连接失败"); ftpClient.disconnect(); return result; } // 转移工作目录至指定目录下 boolean change = ftpClient.changeWorkingDirectory(path); ftpClient.setFileType(FTP.BINARY_FILE_TYPE); if (change) { result = ftpClient.storeFile(new String(filename.getBytes(encoding),"iso-8859-1"), input); if (result) { System.out.println("上传成功!"); } } input.close(); ftpClient.logout(); } catch (IOException e) { e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException ioe) { } } } return result; } /** * 将本地文件上传到FTP服务器上 * */ public void testUpLoadFromDisk() { try { FileInputStream in = new FileInputStream(new File("D:/test02/list.txt")); boolean flag = uploadFile("10.0.0.102", 21, "admin","123456", "/", "lis.txt", in); System.out.println(flag); } catch (FileNotFoundException e) { e.printStackTrace(); } } /** * Description: 从FTP服务器下载文件 * * @Version1.0 * @param url * FTP服务器hostname * @param port * FTP服务器端口 * @param username * FTP登录账号 * @param password * FTP登录密码 * @param remotePath * FTP服务器上的相对路径 * @param fileName * 要下载的文件名 * @param localPath * 下载后保存到本地的路径 * @return */ public static boolean downFile(String url, int port, String username, String password, String remotePath, String fileName, String localPath) { boolean result = false; try { int reply; ftpClient.setControlEncoding(encoding); /* * 为了上传和下载中文文件，有些地方建议使用以下两句代替 * new String(remotePath.getBytes(encoding),"iso-8859-1")转码。 * 经过测试，通不过。 */// FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);// conf.setServerLanguageCode("zh"); ftpClient.connect(url, port); // 如果采用默认端口，可以使用ftp.connect(url)的方式直接连接FTP服务器 ftpClient.login(username, password);// 登录 // 设置文件传输类型为二进制 ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); // 获取ftp登录应答代码 reply = ftpClient.getReplyCode(); // 验证是否登陆成功 if (!FTPReply.isPositiveCompletion(reply)) { ftpClient.disconnect(); System.err.println("FTP server refused connection."); return result; } // 转移到FTP服务器目录至指定的目录下 ftpClient.changeWorkingDirectory(new String(remotePath.getBytes(encoding),"iso-8859-1")); // 获取文件列表 FTPFile[] fs = ftpClient.listFiles(); for (FTPFile ff : fs) { if (ff.getName().equals(fileName)) { File localFile = new File(localPath + "/" + ff.getName()); OutputStream is = new FileOutputStream(localFile); ftpClient.retrieveFile(ff.getName(), is); is.close(); } } ftpClient.logout(); result = true; } catch (IOException e) { e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException ioe) { } } } return result; } /** * 将FTP服务器上文件下载到本地 * */ public void testDownFile() { try { boolean flag = downFile("10.0.0.102", 21, "admin", "123456", "/", "ip.txt", "E:/"); System.out.println(flag); } catch (Exception e) { e.printStackTrace(); } } public static void main(String[] args) { FtpApche fa = new FtpApche(); fa.testDownFile(); fa.testUpLoadFromDisk(); }}2.FTP文件夹的上传与下载(注意是整个文件夹)
package ftp;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.TimeZone;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; public class FTPTest_04 { private FTPClient ftpClient; private String strIp; private int intPort; private String user; private String password; private static Logger logger = Logger.getLogger(FTPTest_04.class.getName()); /* * * Ftp构造函数 */ public FTPTest_04(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 romotUpLoadePath上传服务器路径 - 应该以/结束 * */ public boolean uploadFile(File localFile, String romotUpLoadePath) { BufferedInputStream inStream = null; boolean success = false; try { this.ftpClient.changeWorkingDirectory(romotUpLoadePath);// 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; } /*** * 下载文件 * @param remoteFileName 待下载文件名称 * @param localDires 下载到当地那个路径下 * @param remoteDownLoadPath remoteFileName所在的路径 * */ public boolean downloadFile(String remoteFileName, String localDires, String remoteDownLoadPath) { String strFilePath = localDires + remoteFileName; BufferedOutputStream outStream = null; boolean success = false; try { this.ftpClient.changeWorkingDirectory(remoteDownLoadPath); outStream = new BufferedOutputStream(new FileOutputStream( strFilePath)); logger.info(remoteFileName + "开始下载...."); success = this.ftpClient.retrieveFile(remoteFileName, outStream); if (success == true) { logger.info(remoteFileName + "成功下载到" + strFilePath); return success; } }catch (Exception e) { e.printStackTrace(); logger.error(remoteFileName + "下载失败"); }finally { if (null != outStream) { try { outStream.flush(); outStream.close(); }catch (IOException e) { e.printStackTrace(); } } } if (success == false) { logger.error(remoteFileName + "下载失败!!!"); } return success; } /*** * @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 = http://www.mamicode.com/new File(localDirectory);"/"; 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; } /*** * @下载文件夹 * @param localDirectoryPath本地地址 * @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); for (int currentFile = 0;currentFile < allFile.length;currentFile++) { if (!allFile[currentFile].isDirectory()) { downloadFile(allFile[currentFile].getName(),localDirectoryPath, remoteDirectory); } } for (int currentFile = 0;currentFile < allFile.length;currentFile++) { if (allFile[currentFile].isDirectory()) { String strremoteDirectoryPath = remoteDirectory + "/"+ allFile[currentFile].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; } public static void main(String[] args) throws IOException { FTPTest_04 ftp=new FTPTest_04("10.0.0.102",21,"admin","123456"); ftp.ftpLogin(); System.out.println("1"); //上传文件夹 boolean uploadFlag = ftp.uploadDirectory("D:\\test02", "/"); //如果是admin/那么传的就是所有文件，如果只是/那么就是传文件夹 System.out.println("uploadFlag : " + uploadFlag); //下载文件夹 ftp.downLoadDirectory("d:\\tm", "/"); ftp.ftpLogOut(); }}Java实现FTP文件与文件夹的上传和下载1
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉： 投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。