org.apache.cxf.transport.servlet.CXFServlet cannot be cast to javax.servlet.Servlet

java.lang.ClassCastException: org.apache.cxf.transport.servlet.CXFServlet cannot be cast to javax.servlet.Servlet

maven下web项目依赖servlet-api.jar

 <dependency>
     <groupId>javax.servlet</groupId>
     <artifactId>servlet-api</artifactId>
     <version>2.4</version>
 </dependency>

忘了应该这么写以免与tomcat内置jar包冲突：

 <dependency>
 　　 <groupId>javax.servlet</groupId>
  　　<artifactId>servlet-api</artifactId>
 　　 <version>2.4</version>
 　　 <scope>provided</scope>
 </dependency>