java基础面试题

equals与==，hashcode的区别

https://www.jianshu.com/p/b196d74f8aeb

https://www.cnblogs.com/bianfuxia/p/12064720.html

 

get与post的区别

https://www.iteye.com/blog/tctl-795859

 

mysql的find_in_set()函数的使用

https://www.cnblogs.com/xiaoxi/p/5889486.html

 

mysql的expain关键字的作用

https://my.oschina.net/scipio/blog/292992