用jdbc连接mysql时报下图错误处理方法。
报错全文：The server time zone value ‘???ú±ê×??±??’ is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.
该错误显示是mysql设置时区与当前电脑系统时区不符，需要手动修改时区为(中国)东八区“+8:00”.
方法一：
首先打开cmd登录mysql后输入select curtime();或select now();查看当前时间
然后查看当前时区(show variables like “%time_zone%”)
system_time_zone 为空表示当前mysql时间与系统一致，time_zone为SYSTEM表示当前使用的时区为SYSTEM时区
最后将时区更改为现在所在时区(东八区)
<1>set time_zone="+8:00"; 只能修改当前会话窗口的时区，关闭即还原
<2>set global time_zone="+8:00"; 修改全局时区，永久有效
方法二：
在自己编写的java代码连接mysql语句的url后面添加?useSSL=true&serverTimezone=UTC即可解决该代码报错问题
方法三：
找到mysql的安装路径，然后在MySQL Server 5.5里面找到my.ini
打开my.ini，找到mysqld，在mysqld下面输入default-time-zone = '+8:00’点击保存，最后重启mysql服务即可
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