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/itheimach/article/details/52096664?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.control&dist_request_id=4380a294-fad0-4140-8f6c-bff0eb59b1e2&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.control

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

Java序列化Serializable初识（2）——与SignedObject结合使用

https://blog.csdn.net/chai_132/article/details/46592891