我在运行spring应用程序时遇到了一些异常我不知道为什么会发生这种情况请帮帮我，我已经在我的系统中导入了应用程序并尝试运行但是它显示了这个错误请帮我搞清楚
java.lang.NoClassDefFoundError: javax/servlet/AsyncListener
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2854)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1159)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1647)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
at java.lang.Class.getDeclaredMethods(Class.java:1791)
at org.springframework.core.type.StandardAnnotationMetadata.hasAnnotatedMethods(StandardAnnotationMetadata.java:159)
at org.springframework.context.annotation.ConfigurationClassUtils.isLiteConfigurationCandidate(ConfigurationClassUtils.java:104)
at org.springframework.context.annotation.ConfigurationClassUtils.checkConfigurationClassCandidate(ConfigurationClassUtils.java:87)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:233)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:203)
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:622)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:451)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:634)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:591)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:511)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:452)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1206)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
这是web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>EmployeeWebSpring</display-name>
<!-- The front controller of this Spring Web application, responsible for
handling all application requests -->
<servlet>
<servlet-name>ds</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- Map all requests to the DispatcherServlet for handling -->
<servlet-mapping>
<servlet-name>ds</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.css</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.gif</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.jpg</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.png</url-pattern>
</servlet-mapping>
</web-app>
这是ds-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<context:annotation-config />
<mvc:annotation-driven />
<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource"
id="dataSource">
<property value="com.mysql.jdbc.Driver" name="driverClassName" />
<property value="jdbc:mysql://192.168.25.30:3306/employee"
name="url" />
<property value="hr" name="username" />
<property value="hr123" name="password" />
</bean>
<bean id="employeeDaoImpl" class="com.nousinfo.tutorial.employee.dao.impl.EmployeeDAOImpl">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="departmentDaoImpl"
class="com.nousinfo.tutorial.employee.dao.impl.DepartmentDAOImpl">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="projectDaoImpl" class="com.nousinfo.tutorial.employee.dao.impl.ProjectDAOImpl">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="employeserviceImpl" class=" com.nousinfo.tutorial.service.impl.EmployeeServiceImpl">
<property name="daoImpl" ref="employeeDaoImpl" />
</bean>
<bean id="departmentserviceImpl"
class=" com.nousinfo.tutorial.service.impl.DepartmentServiceImpl">
<property name="departmentDAOImpl" ref="departmentDaoImpl" />
</bean>
<bean id="projectserviceImpl" class=" com.nousinfo.tutorial.service.impl.ProjectServiceImpl">
<property name="projectDAOImpl" ref="projectDaoImpl" />
</bean>
<bean id="mycontroller"
class="com.nousinfo.tutorial.controllers.SearchEmployeeController">
<property name="employeeServiceImpl" ref="employeserviceImpl"></property>
</bean>
<bean id="emplController" class="com.nousinfo.tutorial.controllers.EmployeeController">
<property name="employeeServiceImpl" ref="employeserviceImpl" />
<property name="projectServiceImpl" ref="projectserviceImpl" />
</bean>
<bean id="deaprtmentController" class="com.nousinfo.tutorial.controllers.DepartmentController">
<property name="departmentServiceImpl" ref="departmentserviceImpl"></property>
</bean>
<bean id="deptCotrooler"
class="com.nousinfo.tutorial.controllers.SearchDepartmentController">
<property name="departmentServiceImpl" ref="departmentserviceImpl"></property>
</bean>
<bean id="projectController" class="com.nousinfo.tutorial.controllers.ProjectController">
<property name="projectServiceImpl" ref="projectserviceImpl"></property>
</bean>
<bean id="projectSearchController"
class="com.nousinfo.tutorial.controllers.SearchProjectController">
<property name="projectServiceImpl" ref="projectserviceImpl"></property>
</bean>
<bean id="configurationLoader"
class="org.springmodules.validation.bean.conf.loader.annotation.AnnotationBeanValidationConfigurationLoader" />
<bean id="validator" class="org.springmodules.validation.bean.BeanValidator"
p:configurationLoader-ref="configurationLoader" />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/" p:suffix=".jsp" />
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="com/nousinfo/resources/messages" />
</bean>
<!-- Configure the multipart resolver -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
</bean>
<!-- configuring BeanNameViewResolver -->
<!-- <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"></bean>
configuring exception Resolver <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<property name="exceptionMappings"> <props> <prop key="org.springframework.dao.DAOException">dberrorView</prop>
<prop key="java.lang.NumberFormatException">notANumber</prop> </props> </property>
</bean> configuring views required to render the view for /search.spring
<bean name="successSingleEmp" class="org.springframework.web.servlet.view.JstlView">
<property name="url" value="/WEB-INF/EmployeeDetail.jsp" /> </bean> <bean
name="successMultipleEmps" class="org.springframework.web.servlet.view.JstlView">
<property name="url" value="/WEB-INF/EmployeeList.jsp" /> </bean> <bean name="dberrorView"
class="org.springframework.web.servlet.view.JstlView"> <property name="url"
value="/WEB-INF/DBError.jsp" /> </bean> <bean name="notANumber" class="org.springframework.web.servlet.view.JstlView">
<property name="url" value="/WEB-INF/NotANumberError.jsp" /> </bean> CONFIGURING
THE MEASSAGE RESOURCES FOR THIS APPLICTION CONTEXT <bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="/com/nousinfo/resources/ApplicationResources"
/> </bean> -->
</beans>