问题:c3p0 配置连接MySQL异常： java.sql.SQLException: Connections could not be acquired from the underlying da

问题:c3p0 配置连接MySQL异常： java.sql.SQLException: Connections could not be acquired from the underlying datab

jdbc.driverclass=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/lsn_surveypark001
jdbc.username=root
jdbc.password=czq123456

在排除N多方法之后 终于意识到可能是版本的问题: 故更新

mysql-connector-java-5.1.44-bin.jar  

之前的版本是

再更新了connector JAR包之后就可以正常连接C3P0数据源了