java使用二进制解决一个字段代表多个状态问题
https://www.jianshu.com/p/dbb1bbd4a1aa
https://www.dazhuanlan.com/jtwj/topics/1452754
https://www.jianshu.com/p/56710bee40d2
https://www.jianshu.com/p/e8afb43e625e
https://www.jianshu.com/p/dbb1bbd4a1aa
https://www.dazhuanlan.com/jtwj/topics/1452754
https://www.jianshu.com/p/56710bee40d2
https://www.jianshu.com/p/e8afb43e625e