刚搭建的 ssm 小项目连接数据库问题,Could not create connection to database server.

救救孩子!!! 整合 ssm 框架 刚搭起来就没跑通
调了一下午了,已经要砸电脑了:) ,百度了一堆,是在是想不出来哪里有问题
已经尝试的方案:[更换 jdbc 驱动:从 5->8(本地的 mysql 用的 8) , 调整连接 url[时区 ssl 什么的] , Navicat 正常连接]
这是报错信息
17-Oct-2019 21:25:29.051 警告 [RMI TCP Connection(3)-127.0.0.1]org.mybatis.spring.mapper.ClassPathMapperScanner.doScan No MyBatis mapper was found in '[com.manong.mapper]' package. Please check your configuration. 17-Oct-2019 21:25:30.244 严重 [RMI TCP Connection(3)-127.0.0.1] com.alibaba.druid.support.logging.JakartaCommonsLoggingImpl.error init datasource error, url: jdbc:mysql://localhost:3306/test_demo1?serverTimezone=GMT%2B8C&amp&&useSSL=false com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:488) at com.mysql.jdbc.Util.handleNewInstance(Util.java:408) at com.mysql.jdbc.Util.getInstance(Util.java:383)