4.0.0 com.taosdata.demo connectionPools 1.0-SNAPSHOT com.taosdata.jdbc taos-jdbcdriver 2.0.17 com.alibaba druid 1.1.17 com.zaxxer HikariCP 3.2.0 commons-pool commons-pool 1.5.4 commons-dbcp commons-dbcp 1.4 com.mchange c3p0 0.9.5.4 log4j log4j 1.2.17