123
https://www.jianshu.com/p/7169dd7e559c
https://www.jianshu.com/p/b3f9007be020
https://www.jianshu.com/p/63cca0db1205
https://www.jianshu.com/p/d62fb7a6fee1
https://blog.csdn.net/miachen520/article/details/91039661
https://www.cnblogs.com/jhxxb/p/13293625.html
select for update
es
https://blog.csdn.net/xuri2016/article/details/79142732
年龄计算
https://www.cnblogs.com/wyf-love-dch/p/7483094.html
java安全之加密技术
https://blog.csdn.net/qq_33643072/article/details/81451604
定时任务
https://www.cnblogs.com/mmzs/p/10161936.html
Activity,Fragment,Service生命周期
https://blog.csdn.net/chai_132/article/details/45077967