Using AntBuilder to Copy a File

   1: def ant = new AntBuilder()

   2: ant.copy(file: 'src.txt', tofile: 'dest.txt')

Copying a File to a Directory / Overwriting the Destination File

   1: ant.copy(file: 'src.txt', todir: '../backup')

   2: ant.copy(file: 'src.txt', tofile: 'dest.txt', overwrite: true)