jdk:https://blog.csdn.net/zw235345721/article/details/78702254 mysql:https://www.jianshu.com/p/fd3aae701db9 idea:https://www.jianshu.com/p/3c87487e7121 美化：https://www.jianshu.com/p/53eb1075f627 ，https://www.jianshu.com/p/59a3f1601cfc
