今天用IDEA遇到这个问题 后来发现是存放jar的lib文件夹放错了位置,直接放在了web文件夹下,放在WEB-INF下就正常了,不太懂其中的区别,以后弄懂再更新
org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [LoadServlet] in context with path [/MywebTest] threw exception [Servlet execution threw an exception] with root cause
java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource