用java如何实现对图片旋转？

Question

谢谢先~~~~~~~~~~~~~~~~~graphics2d rotate?????????
给个例子说明一下

Answer 1

我想用转移像素点，但是太麻烦
想问一下用AffineTransform这个是否能直接转换
可是我没捣腾出来，她好像不对图片起作用
不知道哪位高手能知道，给个例子，谢谢了

Answer 2

public static final int J2D_ROTATE_90 = 90;
    public static final int J2D_ROTATE_180 = 180;
    public static final int J2D_ROTATE_270 = 270;
    /**
     * 旋转 - 参数指定目标图旋转角度。
     * @param bufferedImage BufferedImage
     * @param radian int
     * @param hints RenderingHints
     * @return BufferedImage
     */
    public static BufferedImage rotateJ2D(BufferedImage bufferedImage,
                                          int radian,
                                          RenderingHints hints) {
        int width = bufferedImage.getWidth();
        int height = bufferedImage.getHeight();        BufferedImage dstImage = null;
        AffineTransform affineTransform = new AffineTransform();        if (radian == 180) {
            affineTransform.translate(width, height);
            dstImage = new BufferedImage(width, height, bufferedImage.getType());
        } else if (radian == 90) {
            affineTransform.translate(height, 0);
            dstImage = new BufferedImage(height, width, bufferedImage.getType());
        } else if (radian == 270) {
            affineTransform.translate(0, width);
            dstImage = new BufferedImage(height, width, bufferedImage.getType());
        }        affineTransform.rotate(java.lang.Math.toRadians(radian));
        AffineTransformOp affineTransformOp = new AffineTransformOp(
                affineTransform,
                hints);        return affineTransformOp.filter(bufferedImage, dstImage);
    }

Answer 3

http://topic.csdn.net/t/20000901/11/27883.html

Answer 4

把文件读出来，编码后再保存，编码的方法可以参考
http://ijsp.net/2/2003-3/25/0000353.shtml

Answer 5

谢谢~~~~~~~~~舞者~~~~~~~~~~
看来还要仔细研究jdk