java中的圖片旋轉

/** *//**
     * 旋轉圖片爲指定角度
     * 
     * @param bufferedimage
     *            目標圖像
     * @param degree
     *            旋轉角度
     * @return
     */
    public static BufferedImage rotateImage(final BufferedImage bufferedimage,
            final int degree){
        int w = bufferedimage.getWidth();
        int h = bufferedimage.getHeight();
        int type = bufferedimage.getColorModel().getTransparency();
        BufferedImage img;
        Graphics2D graphics2d;
        (graphics2d = (img = new BufferedImage(w, h, type))
                .createGraphics()).setRenderingHint(
                RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2);
        graphics2d.drawImage(bufferedimage, 0, 0, null);
        graphics2d.dispose();
        return img;
    }
    /** *//**
     * 變更圖像爲指定大小
     * 
     * @param bufferedimage
     *            目標圖像
     * @param w
     *            寬
     * @param h
     *            高
     * @return
     */
    public static BufferedImage resizeImage(final BufferedImage bufferedimage,
            final int w, final int h) {
        int type = bufferedimage.getColorModel().getTransparency();
        BufferedImage img;
        Graphics2D graphics2d;
        (graphics2d = (img = createImage(w, h, type))
                .createGraphics()).setRenderingHint(
                RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        graphics2d.drawImage(bufferedimage, 0, 0, w, h, 0, 0, bufferedimage
                .getWidth(), bufferedimage.getHeight(), null);
        graphics2d.dispose();
        return img;
    }
    /** *//**
     * 水平翻轉圖像
     * 
     * @param bufferedimage 目標圖像
     * @return
     */
    public static BufferedImage flipImage(final BufferedImage bufferedimage){
        int w = bufferedimage.getWidth();
        int h = bufferedimage.getHeight();
        BufferedImage img;
        Graphics2D graphics2d;
        (graphics2d = (img = createImage(w, h, bufferedimage
                .getColorModel().getTransparency())).createGraphics())
                .drawImage(bufferedimage, 0, 0, w, h, w, 0, 0, h, null);
        graphics2d.dispose();
        return img;
    } 

文章出處：http://www.diybl.com/course/3_program/java/javajs/200823/98524.html