C3P0 problems in using database connection pooling

Java.io.filenotfoundexception:d:\javastudy\javaee\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\ Wtpwebapps\day_05\web-inf\lib\mchange-commons-java-0.2.3.4.jar (the system cannot find the file specified.) )

The above exception, it is easy to think of importing Mchange-commons-java-0.2.3.4.jar package, but still can't solve the problem. This will appear

"May 14, 2017 4:09:37 pm Com.mchange.v2.log.MLog <clinit>
Info: Mlog Clients using Java 1.4+ standard logging. "

The correct approach should be: Import the Mchange-commons-java-0.2.11.jar package under the c3p0-0.9.5.2 folder under the Lib directory. can solve the problem.

C3P0 problems in using database connection pooling