连接数据库报错：The last packet successfully received from the server was 67 milliseconds ago.

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今天在阿里云上安装了一个mysql数据库，然后将本地代码的连接地址直接换成阿里云的地址，没想带连接报错：

报错信息：

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 67 milliseconds ago.  The last packet sent successfully to the server was 65 milliseconds ago.

    网上搜了不少都说了，连接超时问题，可是试了都不行，最后慢慢试错，发现是

&useSSL=false

这句导致的，原因如下：

是本地的jdbc与数据库不一致导致的。