java.sql.SQLException: Unknown system variable 'query_cache_size'
标签：jar包 cep mys tor ble dep enc pen 版本
java.sql.SQLException: Unknown system variable 'query_cache_size'
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.40</version>
</dependency>
换个版本就好了：
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.11</version>
</dependency>