问题:Could not get JDBC Connection; nested exception is java.sql.SQLException: com.mchange.v2.c3p0.ComboPooledDataSource [ java.beans.IntrospectionException: java.lang.reflect.InvocationTargetException [numThreadsAwaitingCheckoutDefaultUser] ] has been
在一个spring xml配置文件中,NamespaceHandler是DefaultBeanDefinitionDocumentReader用来处理自定义命名空间的基础接口.其层次结构如下: <context>为开头的标签统一在ContextNamespaceHandler中进行解析,ContextNamespaceHandler继承了NamespaceHandlerSupport,实现了NamespaceHandler接口.其解析的标签有: @Override public void in