微信下载图片返回content-Type是image/jpeg，但是文件后缀名是xx.jpg，这是什么情况？而且 BufferedImage srcImg = ImageIO.read(input); 读取图片流报空指针？几率很大
业精于勤，荒于嬉;行成于思，毁于随。
image/jpeg 是图片的格式xx.jpg 这个jpg is the expression of the above format
image/jpeg
xx.jpg
jpg
The null pointer problem can only be found line by line slowly...
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
image/jpeg是图片的格式xx.jpg这个jpgis the expression of the above formatThe null pointer problem can only be found line by line slowly...