使用 Java JSch 進行 SFTP 文件傳輸

Question

這是我的代碼，它在遠程服務器上檢索文件的內容並顯示為 output。

package sshexample;

import com.jcraft.jsch.*;
import java.io.*;

public class SSHexample 
{
public static void main(String[] args) 
{
    String user = "user";
    String password = "password";
    String host = "192.168.100.103";
    int port=22;

    String remoteFile="sample.txt";

    try
    {
        JSch jsch = new JSch();
        Session session = jsch.getSession(user, host, port);
        session.setPassword(password);
        session.setConfig("StrictHostKeyChecking", "no");
        System.out.println("Establishing Connection...");
        session.connect();
        System.out.println("Connection established.");
        System.out.println("Creating SFTP Channel.");
        ChannelSftp sftpChannel = (ChannelSftp) session.openChannel("sftp");
        sftpChannel.connect();
        System.out.println("SFTP Channel created.");
        InputStream out= null;
        out= sftpChannel.get(remoteFile);
        BufferedReader br = new BufferedReader(new InputStreamReader(out));
        String line;
        while ((line = br.readLine()) != null) 
        {
            System.out.println(line);
        }
        br.close();
        sftpChannel.disconnect();
        session.disconnect();
    }
    catch(JSchException | SftpException | IOException e)
    {
        System.out.println(e);
    }
}
}

現在如何實現將文件復制到本地主機的程序以及如何將文件從本地主機復制到服務器。

在這里如何使任何格式的文件的文件傳輸工作。

Answer 1

使用 JSch 通過 SFTP 上傳文件的最簡單方法是：

JSch jsch = new JSch();
Session session = jsch.getSession(user, host);
session.setPassword(password);
session.connect();

ChannelSftp sftpChannel = (ChannelSftp) session.openChannel("sftp");
sftpChannel.connect();

sftpChannel.put("C:/source/local/path/file.zip", "/target/remote/path/file.zip");

下載類似：

sftpChannel.get("/source/remote/path/file.zip", "C:/target/local/path/file.zip");

---

您可能需要處理UnknownHostKey異常。

Answer 2

用法：

sftp("file:/C:/home/file.txt", "ssh://user:pass@host/home");
sftp("ssh://user:pass@host/home/file.txt", "file:/C:/home");

執行

Answer 3

下面的代碼對我有用

   public static void sftpsript(String filepath) {

 try {
  String user ="demouser"; // username for remote host
  String password ="demo123"; // password of the remote host

   String host = "demo.net"; // remote host address
  JSch jsch = new JSch();
  Session session = jsch.getSession(user, host);
  session.setPassword(password);
  session.connect();

  ChannelSftp sftpChannel = (ChannelSftp) session.openChannel("sftp");
  sftpChannel.connect();

  sftpChannel.put("I:/demo/myOutFile.txt", "/tmp/QA_Auto/myOutFile.zip");
  sftpChannel.disconnect();
  session.disconnect();
 }catch(Exception ex){
     ex.printStackTrace();
 }
   }

或使用 StrictHostKeyChecking 作為“否”（安全后果）

public static void sftpsript(String filepath) {

 try {
  String user ="demouser"; // username for remote host
  String password ="demo123"; // password of the remote host

   String host = "demo.net"; // remote host address
  JSch jsch = new JSch();
   Session session = jsch.getSession(user, host, 22);
   Properties config = new Properties();
   config.put("StrictHostKeyChecking", "no");
   session.setConfig(config);;
   session.setPassword(password);
   System.out.println("user=="+user+"\n host=="+host);
   session.connect();

  ChannelSftp sftpChannel = (ChannelSftp) session.openChannel("sftp");
  sftpChannel.connect();

  sftpChannel.put("I:/demo/myOutFile.txt", "/tmp/QA_Auto/myOutFile.zip");
  sftpChannel.disconnect();
  session.disconnect();
 }catch(Exception ex){
     ex.printStackTrace();
 }
   }

Answer 4

import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.Session;

public class SendFiles {

    public static void main(String[] args) throws Exception {

        String user = "EnterUserName";
        String host = "EnterHostNameOrURL";
        int port = 22;
        String pass = "EnterPassword;
        Session session = SetupConnection.setupConnection(user, host, port, pass);
        ChannelSftp channelSftp = (ChannelSftp) session.openChannel("sftp");
        channelSftp.connect();
        String localFile = "LocalFilePath\\TEMP1.txt"; //source file path
        String remoteDir = "remotePath"; //target directory
        channelSftp.put(localFile, remoteDir);
        channelSftp.exit();
        System.out.println("File Transfer Success");

    }

}