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Editorial Team
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Asked: 2026-06-11T06:25:11+00:00

How to copy a file using Jsch? was the question first in place. As

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“How to copy a file using Jsch?” was the question first in place. As using Jsch is complicated and error-prone and also works very low-level, you need to program several lines to get a simple scp working.

So, how do I implement a scp (or even sftp) with as few lines of code as possible in Java and not violate the DRY principle?

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1 Answer

  1. Editorial Team

    You can use the libraries used by the Ant scp task:

    package org.example.scp;

import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.optional.ssh.Scp;

public class ScpCopyExample {

    public void downloadFile( String remoteFilePath, String localFilePath ) {
        Scp scp = new Scp();
        scp.setFile("username:password@host.example.org:" + remoteFilePath);
        scp.setLocalTofile(localFilePath);
        scp.setProject(new Project()); // prevent a NPE (Ant works with projects)
        scp.setTrust(true); // workaround for not supplying known hosts file

        scp.execute();
    }

    public static void main(String[] args) {
        ScpCopyExample scpDemo = new ScpCopyExample();
        scpDemo.downloadFile("~/test.txt", "testlocal.txt");
    }

}

    I did this with following jars in my classpath:

    • jsch-0.1.48.jar
    • ant-jsch-1.6.5.jar
    • ant-1.7.0.jar
    • ant-launcher-1.7.0.jar

    This example can easily be extended to upload files or use SFTP instead.

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