Failed to obtain JDBC Connection； nested exception is java.sql.SQLException: com.mysql.jdbc.Driver

记录idea报错，

1.引用外部库 mysql-connector-java-8.0.26

      mysql

      mysql-connector-java

      8.0.26

 2. 引入最新版的c3p0

    com.mchange
    c3p0
    0.9.5.5

3.连接的驱动地址为”com.mysql.cj.jdbc.Driver”

连接驱动改为：com.mysql.cj.jdbc.Driver