www.jfileupload.com

Installation :
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1 - Copy jsch.jar and sftpimpl.jar files under lib/ folder of JFileUpload installation.

2 - Modify dist/applet_sftp.js to setup basic parameters and open HTML file
in your browser to try it.

Q:
step1: copy to where?
step 2: how to modify?

Copy under lib/ folder where other JAR files are available.
You can edit .js file with any text editor.