<!-- 图片缩略图 -->

        <dependency>

            <groupId>net.coobird</groupId>

            <artifactId>thumbnailator</artifactId>

            <version>0.4.8</version>

        </dependency>

  //上传图片-压缩

    @PostMapping("/uploadPicCompress")

    @ResponseBody

    public AjaxResult uploadPicCompress(@RequestParam("file") MultipartFile file) throws IOException {

        String filePath = getProfile() + "/group";// 上传图片路径

        String fileName = file.getOriginalFilename();

        String filePath1 = FileUploadUtils.upload(filePath, file);//文件上传返回存储路径

        //压缩图片

        String filePathObj=filePath1.replaceAll("/profile", getProfile());//绝对路径

        int nameIndex=filePathObj.lastIndexOf('/');

        String pathHeader=filePathObj.substring(0,nameIndex+1);

        //图片缩放成宽度720px或者高度1100px的图片

        BufferedImage image = ImageIO.read(new File(filePathObj));

        int pictWidth = image.getWidth();

        int pictHeight = image.getHeight();

        double scaleK=1.0;//压缩比例

        if(pictWidth>720){

            scaleK=(double) 720 / pictWidth;

        }else if(pictHeight>1100){

            scaleK=(double) 1100 / pictHeight;

        }

        if(scaleK!=1.0){

            int fileNampPoint=fileName.lastIndexOf('.');

            String fileNameHead=fileName.substring(0,fileNampPoint);

            String fileNameEnd=fileName.substring(fileNampPoint);

            String scalePath=pathHeader+fileNameHead+"_"+ DateUtils.dateTimeNow()+fileNameEnd;//文件名称加时间，防止重复

            Thumbnails.of(filePathObj).scale(scaleK).toFile(scalePath);//按比例缩小

            //判断新文件保存是否成功,成功则删除原文件

            File fileNew = new File(scalePath);

            if(fileNew!=null){

                new File(filePathObj).delete();

                filePath1=scalePath.replaceAll(getProfile(),"/profile" );

            }

        }

        return AjaxResult.success(filePath1);

    }