Java SFTP Apache commons file download, upload and delete example_setuserdirisroot_liuxiangke0210的博客

Common java properties file for all the examples

serverAddress=111.222.333.444
userId=myUserId
password=myPassword
remoteDirectory=products/                        
localDirectory=import/

Upload file to remote server using SFTP

package com.as400samplecode;
import java.io.File;
import java.io.FileInputStream;
import java.util.Properties;
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.Selectors;
import org.apache.commons.vfs2.impl.StandardFileSystemManager;
import org.apache.commons.vfs2.provider.sftp.SftpFileSystemConfigBuilder;
public class SendMyFiles {
 static Properties props;
 public static void main(String[] args) {
  SendMyFiles sendMyFiles = new SendMyFiles();
  if (args.length < 1)
   System.err.println("Usage: java " + sendMyFiles.getClass().getName()+
     " Properties_file File_To_FTP ");
   System.exit(1);
  String propertiesFile = args[0].trim();
  String fileToFTP = args[1].trim();
  sendMyFiles.startFTP(propertiesFile, fileToFTP);
 public boolean startFTP(String propertiesFilename, String fileToFTP){
  props = new Properties();
  StandardFileSystemManager manager = new StandardFileSystemManager();
  try {
   props.load(new FileInputStream("properties/" + propertiesFilename));
   String serverAddress = props.getProperty("serverAddress").trim();
   String userId = props.getProperty("userId").trim();
   String password = props.getProperty("password").trim();
   String remoteDirectory = props.getProperty("remoteDirectory").trim();
   String localDirectory = props.getProperty("localDirectory").trim();
   //check if the file exists
   String filepath = localDirectory +  fileToFTP;
   File file = new File(filepath);
   if (!file.exists())
    throw new RuntimeException("Error. Local file not found");
   //Initializes the file manager
   manager.init();
   //Setup our SFTP configuration
   FileSystemOptions opts = new FileSystemOptions();
   SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(
     opts, "no");
   SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);
   SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000);
   //Create the SFTP URI using the host name, userid, password,  remote path and file name
   String sftpUri = "sftp://" + userId + ":" + password +  "@" + serverAddress + "/" + 
     remoteDirectory + fileToFTP;
   // Create local file object
   FileObject localFile = manager.resolveFile(file.getAbsolutePath());
   // Create remote file object
   FileObject remoteFile = manager.resolveFile(sftpUri, opts);
   // Copy local file to sftp server
   remoteFile.copyFrom(localFile, Selectors.SELECT_SELF);
   System.out.println("File upload successful");
  catch (Exception ex) {
   ex.printStackTrace();
   return false;
  finally {
   manager.close();
  return true;
}

Download file from remote server using SFTP

package com.as400samplecode;
import java.io.File;
import java.io.FileInputStream;
import java.util.Properties;
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.Selectors;
import org.apache.commons.vfs2.impl.StandardFileSystemManager;
import org.apache.commons.vfs2.provider.sftp.SftpFileSystemConfigBuilder;
public class GetMyFiles {
 static Properties props;
 public static void main(String[] args) {
  GetMyFiles getMyFiles = new GetMyFiles();
  if (args.length < 1)
   System.err.println("Usage: java " + getMyFiles.getClass().getName()+
   " Properties_filename File_To_Download ");
   System.exit(1);
  String propertiesFilename = args[0].trim();
  String fileToDownload = args[1].trim();
  getMyFiles.startFTP(propertiesFilename, fileToDownload);
 public boolean startFTP(String propertiesFilename, String fileToDownload){
  props = new Properties();
  StandardFileSystemManager manager = new StandardFileSystemManager();
  try {
   props.load(new FileInputStream("properties/" + propertiesFilename));
   String serverAddress = props.getProperty("serverAddress").trim();
   String userId = props.getProperty("userId").trim();
   String password = props.getProperty("password").trim();
   String remoteDirectory = props.getProperty("remoteDirectory").trim();
   String localDirectory = props.getProperty("localDirectory").trim();
   //Initializes the file manager
   manager.init();
   //Setup our SFTP configuration
   FileSystemOptions opts = new FileSystemOptions();
   SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(
     opts, "no");
   SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);
   SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000);
   //Create the SFTP URI using the host name, userid, password,  remote path and file name
   String sftpUri = "sftp://" + userId + ":" + password +  "@" + serverAddress + "/" + 
     remoteDirectory + fileToDownload;
   // Create local file object
   String filepath = localDirectory +  fileToDownload;
   File file = new File(filepath);
   FileObject localFile = manager.resolveFile(file.getAbsolutePath());
   // Create remote file object
   FileObject remoteFile = manager.resolveFile(sftpUri, opts);
   // Copy local file to sftp server
   localFile.copyFrom(remoteFile, Selectors.SELECT_SELF);
   System.out.println("File download successful");
  catch (Exception ex) {
   ex.printStackTrace();
   return false;
  finally {
   manager.close();
  return true;

Delete a file on remote server using SFTP

package com.as400samplecode;
import java.io.FileInputStream;
import java.util.Properties;
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.impl.StandardFileSystemManager;
import org.apache.commons.vfs2.provider.sftp.SftpFileSystemConfigBuilder;
public class DeleteRemoteFile {
 static Properties props;
 public static void main(String[] args) {
  DeleteRemoteFile getMyFiles = new DeleteRemoteFile();
  if (args.length < 1)
   System.err.println("Usage: java " + getMyFiles.getClass().getName()+
   " Properties_filename File_To_Delete ");
   System.exit(1);
  String propertiesFilename = args[0].trim();
  String fileToDownload = args[1].trim();
  getMyFiles.startFTP(propertiesFilename, fileToDownload);
 public boolean startFTP(String propertiesFilename, String fileToDownload){
  props = new Properties();
  StandardFileSystemManager manager = new StandardFileSystemManager();
  try {
   props.load(new FileInputStream("properties/" + propertiesFilename));
   String serverAddress = props.getProperty("serverAddress").trim();
   String userId = props.getProperty("userId").trim();
   String password = props.getProperty("password").trim();
   String remoteDirectory = props.getProperty("remoteDirectory").trim();
   //Initializes the file manager
   manager.init();
   //Setup our SFTP configuration
   FileSystemOptions opts = new FileSystemOptions();
   SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(
     opts, "no");
   SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);
   SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000);
   //Create the SFTP URI using the host name, userid, password,  remote path and file name
   String sftpUri = "sftp://" + userId + ":" + password +  "@" + serverAddress + "/" + 
     remoteDirectory + fileToDownload;
   //Create remote file object
   FileObject remoteFile = manager.resolveFile(sftpUri, opts);
   //Check if the file exists
   if(remoteFile.exists()){
    remoteFile.delete();
    System.out.println("File delete successful");
  catch (Exception ex) {
   ex.printStackTrace();
   return false;
  finally {
   manager.close();
  return true;
                    Secure File Transfer Protocol or SFTP uses the SSH secure shell protocol to provides file access, file transfer, and file management functionalities over any reliable data stream. Apache Commons VFS p
				原文链接：http://pro.ctlok.com/2011/06/apache-commons-vfs-for-sftp.html
在 Java 使用 FTP 去上載檔案，下載檔案或去做其他操作也是很簡單，因為 Java
 API 已經包括了對 FTP 的支援。如果不是使用 FTP，而是使用 SFTP:
 SSH File Transfer Protocol，使用Java
 API 實作
   <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter</artifactId>
   </dependency>
   <dependency>
      <groupId>org.springfram
				import org.apache.commons.net.ftp.FTPSClient;
import org.apache.commons.net.io.CopyStreamEvent;
import org.apache.commons.net.io.Util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import
				SFTP是一种基于SSH协议的文件传输协议，它可以安全地传输文件并保护数据的安全性。但是，当使用SFTP下载非常规文件时，可能会出现"SFTP不能下载非常规文件"的错误。
非常规文件包括软链接、设备文件、管道、套接字等。这些文件不是普通的文件，而是指向其他文件或具有特殊功能的文件。
这是因为SFTP的设计目的是传输普通文件，这些非常规文件通常无法打开或在不同系统之间传输。因此，当尝试使用SFTP下载非常规文件时，会出现错误。
解决这个问题的方法是使用其他协议或方法进行非常规文件的传输，例如SCP、rsync、tar等。这些工具可以传输非常规文件，并且在文件处理方面更加灵活。 
总之，SFTP只适用于传输普通的文件。如果要传输非常规文件，请使用其他协议或方法进行传输。
    <groupId>com.danielflower.apprunner</groupId>
    <artifactId>javasysmon</artifactId>
    <version>0.3.5.0</version>
</dependency>
还有到网上找一下CPU统计一般是如何计算的，看一下自然就知道的，不难的。
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                    没有注释？
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                    Bryce230: 
                    图片为什么看不了了
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                    菜菜的大数据开发之路: 
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