import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;

public class ImageUtils {


    /**
     * 裁切图片
     *
     * @param imgFile
     * @param x
     * @param y
     * @param width
     * @param height
     * @return
     * @throws Exception
     */
    public static BufferedImage cutAreaImage(File imgFile, int x, int y, int width, int height) throws Exception {
        String resultFile = "cut/"+imgFile.getName().split("\\.")[0]+"_"+x+"_"+y+".jpg";
        BufferedImage image = ImageIO.read(imgFile);
        image = image.getSubimage(x, y, width, height);
        ImageIO.write(image, "jpg", new File(resultFile));
        return image;
    }


    /**
     * 缩放图片
     *
     * @param imgFile
     * @param width
     * @param height
     * @return
     * @throws Exception
     */
    public static File zoomImage(File imgFile, int width, int height) throws Exception{
        BufferedImage imageBuf = ImageIO.read(imgFile);
        BufferedImage zoomImg = new BufferedImage(width, height, imageBuf.getType());
        Image img = imageBuf.getScaledInstance(width, height, Image.SCALE_SMOOTH);
        Graphics gc = zoomImg.getGraphics();
        gc.setColor(Color.WHITE);
        gc.drawImage(img, 0, 0, null);
        ImageIO.write(zoomImg, "jpg", imgFile);
        return imgFile;
    }


}