c3p0数据源配置抛出Could not load driverClass com.mysql.jdbc.Driver的解决方案

回答1：

spring 加载数据库连接驱动的时候出现找不到驱动类解决办法。

com.mchange.v2.c3p0.DriverManagerDataSourceensureDriverLoaded

1， 首先确定是否有相应的驱动包

2， 查看配置数据库连接文件每行的末尾是否有空格。

回答2：

c3p0数据源配置抛出Could not load driverClass com.mysql.jdbc.Driver的解决方案

1.0 配置c3p0数据源，一直提示 无法加载数据库驱动。

但是明明有驱动，非常疑惑。。。。。

com.mchange.v2.c3p0.DriverManagerDataSource ---- Could not load driverClass com.mysql.jdbc.Driver

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1311)

at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1145)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Class.java:264)

at com.mchange.v2.c3p0.DriverManagerDataSource.ensureDriverLoaded(DriverManagerDataSource.java:112)

at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:144)

at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:195)

at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:184)

at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:200)

at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1086)

at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1073)

at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:44)

at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1810)

at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)

com.mchange.v2.c3p0.DriverManagerDataSource ---- Could not load driverClass com.mysql.jdbc.Driver

仔细观察，木有任何问题，他么的 ，水缸里还能把王八跑了？

<bean />

</bean>

3.0查看jdbc.properties

jdbc.driverClassName=com.mysql.jdbc.Driver

jdbc.url=jdbc\:mysql\://localhost\:3306/dftsms?useUnicode\=true&characterEncoding\=UTF8

jdbc.username=root

jdbc.password=1234

jdbc.initialPoolSize=10

jdbc.maxIdleTime=120

jdbc.acquireIncrement=2

jdbc.idleConnectionTestPeriod=60

仔仔细细看完，木有任何问题啊 ，这他么怎么回事儿。。。。。。

最后，经过多方查证，马丹，原来是jdbc.properties 文件中jdbc.driverClassName=com.mysql.jdbc.Driver,这一句配置 后面有个空格。。。。。。。

问题很恶心，结果很尴尬。。。。