Solve github pages and github .md files do not show pictures

Blog Park uploaded images can not be displayed on github.
Establish img file at github project folder, put pictures

Two ways

Project absolute path

https://raw.githubusercontent.com/用户名/项目名称/master/图片文件夹/xxx.png
For example:
https://raw.githubusercontent.com/cjy513203427/cjy513203427.github.io/master/img/2019-06-24-Java multithreading (b): Thread class /img1.png

Blog absolute path

https://githubpages地址/图片文件夹/xxx.png
https://cjy513203427.github.io/img/2019-06-20-Java multithreading (a): threads and processes / process .png