1, the initial
<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> </dependency>
2, generally because the jar package version mysql-connector-java mysql problems cited .
Because com.mysql.cj.jdbc.Driver engine is in 6+ mysql-connector-java before the reform. 5 and below or com.mysql.jdbc.Driver. To put it plainly, is because the version of the problem, so the engine mysql wrong. Of course not connect.
After 3, revision
<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>6.0.6</version> </dependency>
