编程语言
首页 > 编程语言> > Java实现图片的镜像处理

Java实现图片的镜像处理

作者:互联网

一 获取网络图片并实现流的输出

/**
     * 获取网络图
     *
     * @param url
     * @return
     */
    public static BufferedImage downloadImage(String url) throws Exception {
        log.info("下载网络图片:" + url);
        byte[] bytes = HttpsUtils.getBytes(url);
        InputStream buffin = new ByteArrayInputStream(bytes, 0, bytes.length);
        bytes = null;
        BufferedImage result = ImageIO.read(buffin);
        return result;
    }

二 图片镜像处理(水平翻转)

/**
     * 图片水平翻转
     *
     * @param source   图片源 (为优化内存,原图将会关闭。保留最新的指针)
     * @param flipType 翻转类型(1水平翻转,2垂直翻转)默认为1
     * @return
     */
    public static BufferedImage flipImage(BufferedImage source, Integer flipType) {
        log.info("图片水平翻转-开始。" + flipType);
        int width = source.getWidth();
        int height = source.getHeight();
        BufferedImage result = new BufferedImage(width, height, source.getType());
        Graphics graphics = result.getGraphics();
        try {
            if (flipType != null && flipType.equals(2)) {
                graphics.drawImage(source, 0, 0, width, height, 0, height, width, 0, null);
            } else {
                graphics.drawImage(source, 0, 0, width, height, width, 0, 0, height, null);
            }
        } catch (Exception e) {
            log.error("图片水平翻转-异常", e);
            throw new CommonException("图片水平翻转-异常");
        } finally {
            graphics.dispose();
            source.flush();
        }
        log.info("图片水平翻转-结束");
        return result;
    }

该方法包括垂直翻转,即flipType参数为2的时候,实现图片的倒放。

标签:Java,width,flipType,BufferedImage,height,source,镜像,图片,翻转
来源: https://blog.csdn.net/calm_encode/article/details/119358267