https://blog.csdn.net/oumuv/article/details/84306361
记得添加数据库驱动
https://blog.csdn.net/zhouzhiwengang/article/details/89876323
不然连接不了数据库
https://blog.csdn.net/oumuv/article/details/84306361
出现错误解决
http://www.ibloger.net/article/3067.html
cas 创建证书
https://blog.csdn.net/MissEel/article/details/80744078