HTTP Status 500 – Unable to instantiate Action, productAction, defined for ‘product_save’ in namespace ‘/’productAction
type Exception report
message Unable to instantiate Action, productAction, defined for ‘product_save’ in namespace ‘/’productAction
description The server encountered an internal error that prevented it from fulfilling this request.
exception
Unable to instantiate Action, productAction, defined for ‘product_save’ in namespace ‘/’productAction – action – file:/C:/Users/yang/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/ssh/WEB-INF/classes/struts.xml:20:76
com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:318)
com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:399)
com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:198)
org.apache.struts2.factory.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
org.apache.struts2.factory.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:37)
com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:554)
org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:81)
org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:143)
root cause
java.lang.ClassNotFoundException: productAction
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1335)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1163)
com.opensymphony.xwork2.util.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:176)
com.opensymphony.xwork2.ObjectFactory.getClassInstance(ObjectFactory.java:124)
com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:244)
com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:160)
com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:172)
com.opensymphony.xwork2.factory.DefaultActionFactory.buildAction(DefaultActionFactory.java:22)
com.opensymphony.xwork2.ObjectFactory.buildAction(ObjectFactory.java:137)
com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:299)
com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:399)
com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:198)
org.apache.struts2.factory.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
org.apache.struts2.factory.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:37)
com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:554)
org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:81)
org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:143)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.50 logs.
Apache Tomcat/8.0.50
解决办法：
