Java 浏览器、客户端下载SFTP文件

忘是亡心i 2023-10-07 22:57 14阅读 0赞

#### 浏览器下载SFTP ####

String directory = "/opt/docs/content/certificate/AICH/";
    		String fileName1 = "MASS_READ_TEMPLATE1.xlsx";		
    	    String userName = "root";
    		String password = "centos21";
    		String host = "172.24.8.103";
    		int port = 22;
    /**
    	 *从SFTP上下载文件的方法,请求浏览器
    	 *
    	 * @param context
    	 *            FacesContext
    	 * @param filePath
    	 *           文件路径
    	 * @param fileName
    	 *            文件名
    	 * @param userName
    	 *           用户名
    	 * @param password
    	 *            密码
    	 * @param host
    	 *            ip地址
    	 * @param port
    	 *            端口号
    	 */
    	public static void downAndReadSftpFileToExplorer(FacesContext context, String filePath, String fileName,
    		String userName, String password, String host, int port, String privateKey) throws Exception {
    		ExternalContext externalContext = context.getExternalContext();
    		byte[] buffer = downloadFileSftpToByte(userName, password, host, port, privateKey, filePath, fileName);
    		externalContext.responseReset();
    		externalContext.setResponseContentType("application/octet-stream");
    		externalContext.setResponseContentLength(buffer.length);
    		externalContext.setResponseHeader("Content-Disposition", "attachment;filename=" + new String(fileName));
    		try (OutputStream toClient = new BufferedOutputStream(externalContext.getResponseOutputStream())) {
    			toClient.write(buffer, 0, buffer.length);
    			toClient.flush();
    		} catch (IOException e) {
    			LogLogger.error(e);
    			throw e;
    		}
    	}
    
    /**
    	 * @Description: SFTP文件转Byte
    	 * @param userName
    	 *            用户名
    	 * @param password
    	 *            密码
    	 * @param host
    	 *            ip地址
    	 * @param port
    	 *            端口号
    	 * @param privateKey
    	 *           私钥
    	 * @param directory
    	 *            文件路径
    	 * @param downloadFile
    	 *            文件名
    	 * @Return: byte[]
    	 * @Throws: Exception
    	 */
    	public static byte[] downloadFileSftpToByte(String userName, String password, String host, int port,
    			String privateKey, String directory, String downloadFile) throws Exception {
    		Session session = null;
    		ChannelSftp sftp = null;
    		//网关服务器SFTP
    		try {
    			JSch jsch = new JSch();
    			if (privateKey != null) {
    				// 密钥设置
    				jsch.addIdentity(privateKey);
    			}
    			session = jsch.getSession(userName, host, port);
    			if (password != null) {
    				session.setPassword(password);
    			}
    			Properties config = new Properties();
    			config.put("StrictHostKeyChecking", "no");
    			session.setConfig(config);
    			session.connect();
    			Channel channel = session.openChannel("sftp");
    			channel.connect();
    			sftp = (ChannelSftp) channel;
    		} catch (JSchException e) {
    			e.printStackTrace();
    		}
    		if (null!=directory&&!"".equals(directory)) {
    			sftp.cd(directory);
    		}
    		InputStream is = sftp.get(downloadFile);
    		byte[] fileData = IOUtils.toByteArray(is);
    		return fileData;
    	}

#### 客户端下载SFTP ####

/**
    	 * @Description: 客户端下载SFTP文件
    	 * @param userName
    	 *            用户名
    	 * @param password
    	 *            密码
    	 * @param host
    	 *            ip地址
    	 * @param port
    	 *            端口号
    	 * @param privateKey
    	 *            私钥
    	 * @param directory
    	 *            文件路径
    	 * @param downloadFile
    	 *            文件名
    	 * @param saveFile
    	 *            保存文件地址
    	 * @Return: void
    	 * @Throws: Exception
    	 */
    	public static void downloadFileToSftp(String userName, String password, String host, int port, String privateKey,
    			String directory, String downloadFile, String saveFile) throws Exception {
    		Session session = null;
    		ChannelSftp sftp = null;
    		// SFTP服务器
    		try {
    			JSch jsch = new JSch();
    			if (null!=privateKey) {
    				// 私钥
    				jsch.addIdentity(privateKey);
    			}
    			session = jsch.getSession(userName, host, port);
    			if (password != null) {
    				session.setPassword(password);
    			}
    			Properties config = new Properties();
    			config.put("StrictHostKeyChecking", "no");
    			session.setConfig(config);
    			session.connect();
    			Channel channel = session.openChannel("sftp");
    			channel.connect();
    			sftp = (ChannelSftp) channel;
    		} catch (JSchException e) {
    			e.printStackTrace();
    		}
    		if (null!=directory && !"".equals(directory)) {
    			sftp.cd(directory);
    		}
    		File file = new File(saveFile);
    		sftp.get(downloadFile, new FileOutputStream(file));
    	}