学习node.js-首篇

1.要学会用exspret框架、
2，npm i body-parser express mysql  安装请求参数和数据库

[https://www.cnblogs.com/ldlx-mars/p/9047269.html](https://www.cnblogs.com/ldlx-mars/p/9047269.html)
[https://www.cnblogs.com/ldlx-mars/p/9060682.html](https://www.cnblogs.com/ldlx-mars/p/9060682.html)

高级：https://www.jianshu.com/p/ea0122ad1ac0