每次新年生成一个项目运行都会提示

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

必须手工在 pom.xml 里新增引用

<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>6.0.6</version>
        </dependency>