jmeter使用jdbc连接mysql数据库遇到的问题

问题一、已将myql的jar包放在jmeter5.1的lib目录下并重启过jmeter，连接数据库提示

Cannot create JDBC driver of class 'com.mysql.jdbc.Driver' for connect URL 'jdbc.mysql://localhost:3306/database'

 原因：

URL填写有误，将冒号“：”写为了点 “.”

应为：jdbc:mysql://localhost:3306/database

 问题二、

Cannot create PoolableConnectionFactory (Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.)

 原因：

mysql-connector-java的jar包版本太低，更换高版本后问题解决。