web前段和java基础

css五大选择器
https://blog.csdn.net/w1226689046/article/details/80043228
css导入方式
https://www.cnblogs.com/dotnet261010/p/7198892.html
js内置对象
https://www.cnblogs.com/liuluteresa/p/6413988.html
dom
https://blog.csdn.net/qq_17550381/article/details/80809826
BOM中存在的五个对象介绍
http://www.php.cn/js-tutorial-411163.html
js全局函数
https://blog.csdn.net/tangxiujiang/article/details/78236438
jq
http://www.w3school.com.cn/jquery/jquery_selectors.asp
线程生命周期
https://www.cnblogs.com/jilodream/p/4289316.html
mysql 内、左、右外连接
https://blog.csdn.net/plg17/article/details/78758593
mysql子查询
https://www.cnblogs.com/zhuiluoyu/p/5822481.html
jsp 内置对象，动作，指令
https://blog.csdn.net/u010897406/article/details/49618413