你如何在Groovy中调整图像大小？

import static java.awt.RenderingHints.*
import java.awt.image.BufferedImage
import javax.imageio.ImageIO

def img = ImageIO.read( new File( '/tmp/image.png' ) )

def scale = 0.5

int newWidth = img.width * scale
int newHeight = img.height * scale

new BufferedImage( newWidth,newHeight,img.type ).with { i ->
  createGraphics().with {
    setRenderingHint( KEY_INTERPOLATION,VALUE_INTERPOLATION_BICUBIC )
    drawImage( img,newWidth,null )
    dispose()
  }
  ImageIO.write( i,'png',new File( '/tmp/scaled.png' ) )
}