struts 应用程序中的 javax.servlet.ServletException答案

【问题标题】：javax.servlet.ServletException in struts applicationstruts 应用程序中的 javax.servlet.ServletException
【发布时间】：2014-01-30 07:49:11
【问题描述】：

得到javax.servlet.ServletException：java.lang.ClassCastException:com.dna.nsm.sim.action.LogoutAction

在 struts 1 应用程序中。

错误信息：

javax.servlet.ServletException: java.lang.ClassCastException: com.dna.nsm.sim.action.LogoutAction
    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:690)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125)


root cause 

java.lang.ClassCastException: com.dna.nsm.sim.action.LogoutAction
    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:690)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125)

注销操作代码：

public class LogoutAction  extends Action{
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response) {
        // To redirect to the Login page
        return mapping.findForward("success");
    }
}

Struts-config.xml 部分

 <action path="/logout" type="com.dna.nsm.sim.action.LogoutAction" >
            <forward name="success" path="/tiles/login/body.jsp" />
 </action>

请提出建议。

【问题讨论】：

标签： java servlets struts1

【解决方案1】：

检查您的导入并确保您扩展了正确的 Action 类。

【讨论】：