阿里云RDS使用报Establishing SSL connection without server's identity verification is not recommed

今天测试阿里云的RDS服务器，mysql连接，日志报出了这个错误

Tue Jul 10 16:50:33 CST 2018 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

大概的翻译是：
Tue Jul 10 16:50:33 CST 2018警告：不建议在没有服务器身份验证的情况下建立SSL连接。根据MySQL 5.5.45 +，5.6.26 +和5.7.6+要求如果未设置显式选项，则必须默认建立SSL连接。为了符合不使用SSL的现有应用程序，verifyServerCertificate属性设置为“false”。您需要通过设置useSSL = false显式禁用SSL，或者设置useSSL = true并为服务器证书验证提供信任库。

我们的mysql的配置参数如下：

jdbc.param=useUnicode=true&allowMultiQueries=true&characterEncoding=utf8&zeroDateTimeBehavior=round

为了解决bug后面加上&useSSL=false
将配置修改为

jdbc.param  =  useUnicode=true&allowMultiQueries=true&characterEncoding=utf8&zeroDateTimeBehavior=round&useSSL=false

如果上面的办法并没有生效，请检查自己的mysql-connector-java的jar包的版本，我的是5.1.39

 <dependency>  
         <groupId>mysql</groupId>  
         <artifactId>mysql-connector-java</artifactId>  
         <version>5.1.39</version>  
 </dependency>