See http://jakarta.apache.org/commons/dbcp/ for additional and up-to-date information on Commons DBCP.
This product includes software developed by The Apache Software Foundation (http://www.apache.org/).
参见：拨云剑之commons-dbcp JAR 包
http://www.boyunjian.com/javadoc/commons-dbcp/commons-dbcp/1.4/_/org/apache/commons/dbcp/package-summary.html