SpringMVC数据库配置报错

org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.apache.commons.dbcp.BasicDataSource] for bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: org.apache.commons.dbcp.BasicDataSource
	at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1327)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:594)
	at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1396)
	at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:959)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:683)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
	at org.springframework.context.support.AbstractApplicationContext.__refresh(AbstractApplicationContext.java:482)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java)
	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4797)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5291)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.dbcp.BasicDataSource
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1713)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1558)
	at org.springframework.util.ClassUtils.forName(ClassUtils.java:247)
	at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:395)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1348)
	at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1319)
	... 19 more

今天在项目启动的时候报这个错误，我一直在思考原因在哪，看样是是使用SpringMVC的数据库配置存在着一些问题

其实我们在使用Spring的时候数据源头的配置需要在两个地方进行配置，首先是web-xml：

  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener
		</listener-class>
  </listener>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>WEB-INF/applicationContext.xml</param-value>
  </context-param>
  <servlet-mapping>

首先是配置这样的一个listener，这样在项目启动的时候就会加载web-inf下面applicationContent.xml这个配置文件

那么我们将加载数据的配置就存在这个applicationContent.xml文件里面:

	<!-- 获取数据源 -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close">
		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
		<property name="url"
			value="jdbc:mysql://localhost:3306/shopping?characterEncoding=utf8" />
		<property name="username" value="root" />
		<property name="password" value="11111" />
	</bean>
	<bean id="commonDao" class="com.wdg.util.CommonDao">
		<property name="dataSource" ref="dataSource"></property>
	</bean>

pom.xml里面也需要引入:

	<dependency>
			<groupId>commons-dbcp</groupId>
			<artifactId>commons-dbcp</artifactId>
			<version>1.2.2</version>
		</dependency>

当然你不是maven项目的话，可以自己去下载这样的jar，上面的三个地方配置好了之后基本上可以实现数据库的连接了，

希望对你有所帮助