Apache Tomcat无法加载Mysql驱动程序

Question

我正在使用mysql作为数据库的应用程序和我的应用程序。因此，我在应用程序的WEB-INF/loib altinda中包含了mysql jar文件。仍然c3p0库无法加载用于池的mysql数据库驱动程序。

> 2016-11-15 15:32:23,464 
> [C3P0PooledConnectionPoolManager[identityToken->188ezpw9ksw669r1vn17m6|1032a547]-HelperThread-#8] 
> DEBUG org.apache.catalina.loader.WebappClassLoader- 
> loadClass("com.mysql.jdbc.Driver", false) 2016-11-15 15:32:23,464 
> [C3P0PooledConnectionPoolManager[identityToken->188ezpw9ksw669r1vn17m6|1032a547]-HelperThread-#8] 
> DEBUG org.apache.catalina.loader.WebappClassLoader- Searching local 
> repositories 2016-11-15 15:32:23,464 
> [C3P0PooledConnectionPoolManager[identityToken->188ezpw9ksw669r1vn17m6|1032a547]-HelperThread-#8] 
> DEBUG org.apache.catalina.loader.WebappClassLoader-  
> findClass("com.mysql.jdbc.Driver") 2016-11-15 15:32:23,464 
> [C3P0PooledConnectionPoolManager[identityToken->188ezpw9ksw669r1vn17m6|1032a547]-HelperThread-#8] 
> DEBUG org.apache.catalina.loader.WebappClassLoader- Delegating to 
> parent classloader at end: 
> org.apache.catalina.loader.StandardClassLoader@21d195ca Nov 15, 2016 
> 3:32:23 PM com.mchange.v2.log.slf4j.Slf4jMLog$Slf4jMLogger$WarnLogger 
> log WARNING: Could not load driverClass "com.mysql.jdbc.Driver" 
> java.lang.ClassNotFoundException: "com.mysql.jdbc.Driver"  at 
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720) 
> at 
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571) 
> at java.lang.Class.forName0(Native Method) at 
> java.lang.Class.forName(Class.java:190) at 
> com.mchange.v2.c3p0.DriverManagerDataSource.ensureDriverLoaded(DriverManagerDataSource.java:143) 
> at 
> com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:173) 
> at 
> com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220) 
> at 
> com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206) 
> at 
> com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203) 
> at 
> com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138) 
> at 
> com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125) 
> at 
> com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44) at 
> com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870) 
> at 
> com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696) 

Answer 1

如果你已经配置了通过JNDI你的数据库连接，赔率是，驾驶员必须在tomcat/lib，而不是在webapp的lib目录