在我的maven spring项目的spring-servlet.xml配置文件中，当我由maven构建后运行项目时，会发生异常。
INFO: Initializing Servlet 'spring'
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
Jun 19, 2019 4:05:10 PM org.springframework.context.support.AbstractApplicationContext refresh
WARNING: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [daoImp.EmployeeCruzDaoImp] for bean with name 'dao' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]; nested exception is java.lang.ClassNotFoundException: daoImp.EmployeeCruzDaoImp
Jun 19, 2019 4:05:10 PM org.springframework.web.servlet.FrameworkServlet initServletBean
SEVERE: Context initialization failed
org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [daoImp.EmployeeCruzDaoImp] for bean with name 'dao' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]; nested exception is java.lang.ClassNotFoundException: daoImp.EmployeeCruzDaoImp
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1382)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:663)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:630)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1491)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1014)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:826)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:696)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:662)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:710)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:587)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:526)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:169)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1142)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1089)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:983)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4956)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5270)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3828)
at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:291)
at org.apache.catalina.core.StandardContext.backgroundProcess(StandardContext.java:5608)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1392)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1396)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1396)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1364)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: daoImp.EmployeeCruzDaoImp
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1364)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1185)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:340)
at org.springframework.util.ClassUtils.forName(ClassUtils.java:275)
at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:437)
at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1430)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1374)
... 28 more