将Struts 2应用程序部署到tomcat 7时引发java NoSuchMethodException

Question

在将此web服务部署到Tomcat7中时，获取以下异常

May 25, 2021 7:20:27 PM org.apache.catalina.core.ApplicationContext log INFO: Marking servlet com_xxx_mm_mf_mst_ws_actions_MOCSkuLookUpAction as unavailable May 25, 2021 7:20:27 PM org.apache.catalina.core.StandardContext loadOnStartup SEVERE: Servlet /mst threw load() exception java.lang.NoSuchMethodException: com.xxx.mm.mf.mst.ws.actions.MOCSkuLookUpAction.() at java.lang.Class.getConstructor0(Class.java:3082) at java.lang.Class.newInstance(Class.java:412) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:140) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1148) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1087) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5229) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5516) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:649) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1083) at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1880) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 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) Blockquote

这是web中定义的servlet。xml

<servlet>
        <servlet-name>com_xxx_mm_mf_mst_ws_actions_MOCSkuLookUpAction</servlet-name>
        <servlet-class>com.xxx.mm.mf.mst.ws.actions.MOCSkuLookUpAction</servlet-class>
        <load-on-startup>1</load-on-startup>
</servlet>

这些是为WS定义的java类。 Mocsku查找操作。java和我在实现类、存根和骨架类中都有构造函数

public interface MOCSkuLookUpAction extends java.rmi.Remote {
    public com.xxx.mm.mf.mst.to.TicketDispTO[] loadTicketList(int skuNbr, java.lang.String strNbr, com.xxx.mm.mf.mst.to.ClientTO user) throws java.rmi.RemoteException, com.xxx.mm.mf.mst.ws.exceptions.MOCApplicationException;
    public com.xxx.mm.mf.mst.to.UpcTO getSkuInfo(int skuNbr, java.lang.String strNbr, com.xxx.mm.mf.mst.to.ClientTO user) throws java.rmi.RemoteException, com.xxx.mm.mf.mst.ws.exceptions.MOCApplicationException;
    public java.lang.Object[] getReasonCodes(int actionTyp) throws java.rmi.RemoteException, com.xxx.mm.mf.mst.ws.exceptions.MOCApplicationException;
    public com.xxx.mm.mf.mst.to.TicketDispTO[] createTicket(int skuNbr, java.lang.String strNbr, com.xxx.mm.mf.mst.to.ClientTO user, java.lang.String actionType, int reasonCode) throws java.rmi.RemoteException, com.xxx.mm.mf.mst.ws.exceptions.MOCApplicationException;
}

知道为什么会发生这种异常吗？我在日志异常中找不到与此相关的任何内容。上面显示的异常