Java中 Cannot retrieve definition 错误解决

1、jsp文件：

<html:form action="/admin/exit.do"><input type="image" src="images/quit.gif

2、config页面：<action path="/admin/exit"    type="com.jpkc.admin.action.LogoutAction" >    <forward name="login" path="/admin/login.jsp"/></action>

3、Java文件：public class LogoutAction extends Action {

 @Override public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {   HttpSession session = request.getSession(true);  session.removeAttribute("username");  return mapping.findForward("login"); }

}

4、<input type="image" src="images/quit.gif

5、如果要用到html：form标签则在strtus-config.xml中必须为其创建form-beans成功显示，换成<html:link/>就行了

困扰了大半天，在群里也是没人能明白，到网上查了错误才了解到如果jsp页面中要用到<html:form action=""></html:form>标签的 话务必得创建它的form-bean，否则就会提示Cannot retrieve mapping for action这个错误。