問題

非常に一般的なStrutsエラーメッセージ、

org.apache.struts.action.ForwardAction

クラスが見つかりません。

javax.servlet.ServletException: java.lang.ClassNotFoundException: org.apache.struts.action.ForwardAction
    org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:286)
    org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:718)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:831)

root cause

java.lang.ClassNotFoundException: org.apache.struts.action.ForwardAction
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1516)
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1361)
    org.apache.struts.chain.commands.util.ClassUtils.getApplicationClass(ClassUtils.java:54)
    org.apache.struts.chain.commands.util.ClassUtils.getApplicationInstance(ClassUtils.java:71)
    org.apache.struts.chain.commands.servlet.CreateAction.createAction(CreateAction.java:98)
    org.apache.struts.chain.commands.servlet.CreateAction.getAction(CreateAction.java:68)
    org.apache.struts.chain.commands.AbstractCreateAction.execute(AbstractCreateAction.java:91)
    org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
    org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
    org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
    org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
    org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
    org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:718)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:831)

解決策

ForwardActionクラスは

org.apache.struts.actions.ForwardAction

でパッケージ化されています。

org.apache.struts.action.ForwardAction

ではなく、 “s”の後ろにアクションがあります。