https://www.cnblogs.com/xxzhuang/p/5960001.html
https://www.cnblogs.com/hongxf1990/p/6518570.html
spring security四种实现方式：https://blog.csdn.net/bao19901210/article/details/52574340
https://www.cnblogs.com/sqy123/p/7234674.html
spring security4 详细配置：https://blog.csdn.net/mzh1992/article/details/65631283