一、上传文件
原理就不介绍了，大家直接看代码吧
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/** * Description: 向FTP服务器上传文件 * @Version1.0 Jul 27, 2008 4:31:09 PM by 崔红保（cuihongbao@d-heaven.com）创建 * @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 * @param filename 上传到FTP服务器上的文件名 * @param input 输入流 * @return 成功返回true，否则返回false */publicstaticboolean uploadFile(String url,int port,String username, String password, String path, String filename, InputStream input) { boolean success = false; FTPClient ftp = new FTPClient(); try { int reply; ftp.connect(url, port);//连接FTP服务器 //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 ftp.login(username, password);//登录 reply = ftp.getReplyCode(); if (!FTPReply.isPositiveCompletion(reply)) { ftp.disconnect(); return success; } ftp.changeWorkingDirectory(path); ftp.storeFile(filename, input); input.close(); ftp.logout(); success = true; } catch (IOException e) { e.printStackTrace(); } finally { if (ftp.isConnected()) { try { ftp.disconnect(); } catch (IOException ioe) { } } } return success; }<pre></pre> /*** Description: 向FTP服务器上传文件* @Version1.0 Jul 27, 2008 4:31:09 PM by 崔红保（cuihongbao@d-heaven.com）创建* @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* @param filename 上传到FTP服务器上的文件名* @param input 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 success = false;FTPClient ftp = new FTPClient();try {int reply;ftp.connect(url, port);//连接FTP服务器//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ftp.login(username, password);//登录reply = ftp.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftp.disconnect();return success;}ftp.changeWorkingDirectory(path);ftp.storeFile(filename, input); input.close();ftp.logout();success = true;} catch (IOException e) {e.printStackTrace();} finally {if (ftp.isConnected()) {try {ftp.disconnect();} catch (IOException ioe) {}}}return success;} |
1.将本地文件上传到FTP服务器上，代码如下：
@Test publicvoid testUpLoadFromDisk(){ try { FileInputStream in=new FileInputStream(new File("D:/test.txt")); boolean flag = uploadFile("127.0.0.1", 21, "test", "test", "D:/ftp", "test.txt", in); System.out.println(flag); } catch (FileNotFoundException e) { e.printStackTrace(); } }<pre></pre> @Testpublic void testUpLoadFromDisk(){try {FileInputStream in=new FileInputStream(new File("D:/test.txt"));boolean flag = uploadFile("127.0.0.1", 21, "test", "test", "D:/ftp", "test.txt", in);System.out.println(flag);} catch (FileNotFoundException e) {e.printStackTrace();}}2.在FTP服务器上生成一个文件，并将一个字符串写入到该文件中
@Test publicvoid testUpLoadFromString(){ try { InputStream input = new ByteArrayInputStream("test ftp".getBytes("utf-8")); boolean flag = uploadFile("127.0.0.1", 21, "test", "test", "D:/ftp", "test.txt", input); System.out.println(flag); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } }<pre></pre> @Testpublic void testUpLoadFromString(){try {InputStream input = new ByteArrayInputStream("test ftp".getBytes("utf-8"));boolean flag = uploadFile("127.0.0.1", 21, "test", "test", "D:/ftp", "test.txt", input);System.out.println(flag);} catch (UnsupportedEncodingException e) {e.printStackTrace();}}二、下载文件
从FTP服务器下载文件的代码也很简单，参考如下：
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/** * Description: 从FTP服务器下载文件 * @Version. Jul , :: PM by 崔红保（cuihongbao@d-heaven.com）创建 * @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 */publicstaticboolean 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); //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 ftp.login(username, password);//登录 reply = ftp.getReplyCode(); if (!FTPReply.isPositiveCompletion(reply)) { ftp.disconnect(); return success; } ftp.changeWorkingDirectory(remotePath);//转移到FTP服务器目录 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; }<pre></pre> |
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