Kettle 连接 MySql 驱动：Driver class 'org.gjt.mm.mysql.Driver' could not be found
异常：Driver class 'org.gjt.mm.mysql.Driver' could not be found, make sure the 'MySQL' driver (jar file) is installed.org.gjt.mm.mysql.Driver
Link1：https://mvnrepository.com/artifact/mysql/mysql-connector-java 已测试，可用
Link2：https://dev.mysql.com/downloads/connector/j/
方法：把 mysql-connector-java-5.1.48.jar 复制到 data-integration-*.*\lib\ 目录下
