Java implements picture cropping with specified width and height

I encountered a problem in my work today: the pixels of the face image uploaded by the user are too large and the hardware machine cannot recognize it, so the file must be cropped.

public class ImageCropUtils {


    /**
     * @param fromFileStr 要裁剪的图片路径
     * @param saveToFileStr 保存的图片地址
     * @param suffix 图片后缀
     * @param width 裁剪后宽度
     * @param height 裁剪后高度
     *
     * @return 成功或失败
     * */
    public  static boolean createThumbnail( String fromFileStr, String saveToFileStr, String suffix, int width, int height ) throws Exception {
        // fileExtNmae是图片的格式 gif JPG 或png
        // String fileExtNmae="";

        File F = new File(fromFileStr);

        if (!F.isFile()){
            return false;
        }


        File ThF = new File(saveToFileStr);
        BufferedImage buffer = ImageIO.read(F);
        /*
         * 核心算法，计算图片的压缩比
         */
        int w= buffer.getWidth();
        int h=buffer.getHeight();
        double ratiox = 1.0d;
        double ratioy = 1.0d;

        ratiox= w * ratiox / width;
        ratioy= h * ratioy / height;

        if( ratiox >= 1){
            if(ratioy < 1){
                ratiox = height * 1.0 / h;
            }else{
                if(ratiox > ratioy){
                    ratiox = height * 1.0 / h;
                }else{
                    ratiox = width * 1.0 / w;
                }
            }
        }else{
            if(ratioy < 1){
                if(ratiox > ratioy){
                    ratiox = height * 1.0 / h;
                }else{
                    ratiox = width * 1.0 / w;
                }
            }else{
                ratiox = width * 1.0 / w;
            }
        }
        /*
         * 对于图片的放大或缩小倍数计算完成，ratiox大于1，则表示放大，否则表示缩小
         */
        AffineTransformOp op = new AffineTransformOp(AffineTransform
                .getScaleInstance(ratiox, ratiox), null);
        buffer = op.filter(buffer, null);
        //从放大的图像中心截图
        buffer = buffer.getSubimage((buffer.getWidth()-width)/2, (buffer.getHeight() - height) / 2, width, height);
        //写入文件
        ImageIO.write(buffer, suffix, ThF);

        return true;
    }

    /**
     * @param fromFileInputStream 要裁剪的图片
     * @param saveToFileStr 保存的图片地址
     * @param suffix 图片后缀
     * @param width 裁剪后宽度
     * @param height 裁剪后高度
     *
     * @return 成功或失败
     * */
    public  static boolean createThumbnail(InputStream fromFileInputStream, String saveToFileStr, String suffix, int width, int height ) throws Exception{
        // fileExtNmae是图片的格式 gif JPG 或png
        // String fileExtNmae="";



        File ThF = new File(saveToFileStr);

        BufferedImage buffer = ImageIO.read(fromFileInputStream);
        /*
         * 核心算法，计算图片的压缩比
         */
        int w= buffer.getWidth();
        int h=buffer.getHeight();
        double ratiox = 1.0d;
        double ratioy = 1.0d;

        ratiox= w * ratiox / width;
        ratioy= h * ratioy / height;

        if( ratiox >= 1){
            if(ratioy < 1){
                ratiox = height * 1.0 / h;
            }else{
                if(ratiox > ratioy){
                    ratiox = height * 1.0 / h;
                }else{
                    ratiox = width * 1.0 / w;
                }
            }
        }else{
            if(ratioy < 1){
                if(ratiox > ratioy){
                    ratiox = height * 1.0 / h;
                }else{
                    ratiox = width * 1.0 / w;
                }
            }else{
                ratiox = width * 1.0 / w;
            }
        }
        /*
         * 对于图片的放大或缩小倍数计算完成，ratiox大于1，则表示放大，否则表示缩小
         */
        AffineTransformOp op = new AffineTransformOp(AffineTransform
                .getScaleInstance(ratiox, ratiox), null);
        buffer = op.filter(buffer, null);
        //从放大的图像中心截图
        buffer = buffer.getSubimage((buffer.getWidth()-width)/2, (buffer.getHeight() - height) / 2, width, height);
        try {
            ImageIO.write(buffer, suffix, ThF);
        } catch (Exception ex) {
            ex.printStackTrace();
        }

        return true;
    }









    public static void main(String[] args) {

        try {
            ImageCropUtils.createThumbnail("G:\\face\\韦钰莹.JPG", "G:\\face\\韦钰莹3.JPG","png",280,280);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}