Ao tentar subir a aplicação, to tendo o seguinte erro:

Caused by: java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
        at org.springframework.jdbc.datasource.DriverManagerDataSource.setDriverClassName(DriverManagerDataSource.java:130)
        at br.com.caelum.JpaConfigurator.getDataSource(JpaConfigurator.java:30)
        at br.com.caelum.JpaConfigurator$$EnhancerBySpringCGLIB$$cb146442.CGLIB$getDataSource$2(<generated>)
        at br.com.caelum.JpaConfigurator$$EnhancerBySpringCGLIB$$cb146442$$FastClassBySpringCGLIB$$bef3f40d.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
        at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:309)
        at br.com.caelum.JpaConfigurator$$EnhancerBySpringCGLIB$$cb146442.getDataSource(<generated>)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
        ... 42 more
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
        at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1308)
        at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1136)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:348)
        at org.springframework.jdbc.datasource.DriverManagerDataSource.setDriverClassName(DriverManagerDataSource.java:127)
        ... 53 more