原因：MySQL在高版本需要指明是否進行SSL連接,解決方案：
在jdbc.properties MySQL連接信息jdbc.url中加入ssl=true或false即可，如下所示：
jdbc.url=jdbc:mysql://localhost:3306/eaju?characterEncoding=utf8&useSSL=true
信息: Initializing Spring FrameworkServlet 'SpringMVC'
Mon Feb 06 11:42:07 CST 2017 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.
Mon Feb 06 11:42:07 CST 2017 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.