编码格式

https://blog.csdn.net/maikelsong/article/details/81098456

https://blog.csdn.net/zhanghuaichao/article/details/77862037?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase