针对iphone手机拍照片旋转90度问题解决

来源：互联网发布：网络黄金egd今日价格编辑：程序博客网时间：2024/04/27 22:25
/*    1、图片上传的方法*/@RequestMapping(value = "/uploadPic", method = RequestMethod.POST)    @ResponseBody    public JsonResult upload(@RequestParam("file") MultipartFile[] files){        Boolean flag = false;        String[] picArray = {".jpg",".png",".jpeg"};        JSONArray jsonArray = new JSONArray();        if (files != null && files.length > 0) {            for(MultipartFile multipartFile : files){                if (multipartFile == null || multipartFile.isEmpty()) {                    return new JsonResult(false, "文件不存在");                }                String originalFilename = multipartFile.getOriginalFilename();                for (String suffix : picArray) {                    if(StringUtils.endsWithIgnoreCase(originalFilename, suffix)){                        flag = true;                    }                }                if(!flag){                    return new JsonResult(false, "图片格式不正确，图片只支持jpg,png,jpeg");                }                String extName = originalFilename.substring(originalFilename.lastIndexOf(".") + 1);                String urlString = "";                try {                    /*                        图片上传服务器之前先对旋转的图片进行做修正                    */                    byte[] picBytes = rotatePic(multipartFile, extName);                    //图片上传服务器                    urlString = dfsService.upload(picBytes, extName);                    if (null != urlString && urlString.startsWith("HTTP Status ")) {                        urlString = "";                    }                    jsonArray.add(getJsonObject(urlString, (urlString == "" ? urlString : ImgUtils.choiceImgUrl("800X600", urlString))));                } catch (IOException e) {                    e.printStackTrace();                    LOGGER.error("图片上传失败",e);                    return new JsonResult(false, "图片上传失败");                }            }        }        return new JsonResult(true, jsonArray);    }/*    2、判断图片的是否旋转*/private byte[] rotatePic(MultipartFile multipartFile, String extName) throws IOException{        ByteArrayOutputStream bos;        try {            int orientation=0;            int angle = 0;            Metadata metadata = JpegMetadataReader.readMetadata(multipartFile.getInputStream());            for (Directory dir : metadata.getDirectories()) {                if (dir != null && dir.containsTag(ExifDirectoryBase.TAG_ORIENTATION)) {                    orientation = dir.getInt(ExifDirectoryBase.TAG_ORIENTATION);                    break;                }            }            switch (orientation) {            case 6:                angle = 90;                break;            case 3:                angle = 180;                break;            case 8:                angle = 270;                break;            default:                break;            }            BufferedImage img = ImageIO.read(multipartFile.getInputStream());            if(angle != 0){                //处理旋转的图片                img = RotateImage.Rotate(img, angle);            }            bos = new ByteArrayOutputStream();              //使用流修改图片            ImageIO.write(img, extName, bos);            //返回新的图片数组            return bos.toByteArray();        } catch (JpegProcessingException e) {            return multipartFile.getBytes();        } catch (MetadataException e) {            return multipartFile.getBytes();        } catch (IOException e) {            return multipartFile.getBytes();        }    }/*    3、修正图片的具体工具类（方法）*/public class RotateImage {    public static BufferedImage Rotate(Image src, int angel) {        int src_width = src.getWidth(null);        int src_height = src.getHeight(null);        // calculate the new image size        Rectangle rect_des = CalcRotatedSize(new Rectangle(new Dimension(src_width, src_height)), angel);        BufferedImage res = null;        res = new BufferedImage(rect_des.width, rect_des.height, BufferedImage.TYPE_INT_RGB);        Graphics2D g2 = res.createGraphics();        // transform        g2.translate((rect_des.width - src_width) / 2, (rect_des.height - src_height) / 2);        g2.rotate(Math.toRadians(angel), src_width / 2, src_height / 2);        g2.drawImage(src, null, null);        return res;    }    public static Rectangle CalcRotatedSize(Rectangle src, int angel) {        // if angel is greater than 90 degree, we need to do some conversion        if (angel >= 90) {            if (angel / 90 % 2 == 1) {                int temp = src.height;                src.height = src.width;                src.width = temp;            }            angel = angel % 90;        }        double r = Math.sqrt(src.height * src.height + src.width * src.width) / 2;        double len = 2 * Math.sin(Math.toRadians(angel) / 2) * r;        double angel_alpha = (Math.PI - Math.toRadians(angel)) / 2;        double angel_dalta_width = Math.atan((double) src.height / src.width);        double angel_dalta_height = Math.atan((double) src.width / src.height);        int len_dalta_width = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_width));        int len_dalta_height = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_height));        int des_width = src.width + len_dalta_width * 2;        int des_height = src.height + len_dalta_height * 2;        return new Rectangle(new Dimension(des_width, des_height));    }}/*    4、依赖    <dependency>        <groupId>com.drewnoakes</groupId>        <artifactId>metadata-extractor</artifactId>        <version>2.8.1</version>    </dependency>*/
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