How to transfer files from FTP server to SFTP server and SFTP server to FTP server?

Hello everyone,

Can anyone please help me out...

I can able to transfer files from my local system to FTP server(port no:21) with the help of " org.apache.commons.net.ftp " libraries.































































































































































































































































































































































































































































































































and also I can able to transfer files from my local system to SFTP server(port no:22) with the help of "com.jcraft.jsch.Channel " libraries .































































































































































































































































































































































































































































































































But, i'm unable to transfer files from " FTP server to SFTP server " and " SFTP server to FTP server "..!

I hope you understand my Question. Please help me out...

Thanks inAdvance.