1 https://www.jianshu.com/p/31757e530144
2 NewReader方法
https://blog.csdn.net/u014270740/article/details/89436719
https://blog.csdn.net/u014270740/article/details/89436719
1 Marshal 将结构体实例转为json格式，
Unmarshal 将json格式转为结构体实例，
https://blog.csdn.net/zxy_666/article/details/80173288