java 上传图片压缩

 public static void uploadFile(MultipartFile multfile, String filePath) throws Exception {
        File targetFile = new File(filePath);
        if (!targetFile.exists()) {
            targetFile.mkdirs();
        }
        try {
            //按比例压缩
            Thumbnails.of(multfile.getInputStream()).scale(0.4f).outputQuality(0.25f).toFile(filePath);//filePath:上传图片的路径eg:  xxx/xxx/xxx.jpg
            //按尺寸压缩
            //Thumbnails.of(multfile.getInputStream()).size(100,100).keepAspectRatio(false).toFile(filePath);
        } catch (Exception e) {
            log.info("压缩图片出现异常:", e);
        }
    }

<dependency>
    <groupId>net.coobird</groupId>
    <artifactId>thumbnailator</artifactId>
    <version>0.4.8</version>
</dependency>