异常：nested exception is java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource
解决办法：
检查是否少这两个包
c3p0-0.9.5-pre10.jar
mchange-commons-java-0.2.8.jar
【异常】nested exception is java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource
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转载自blog.csdn.net/GeeLoong/article/details/72598237
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