当我在Struts 1.3应用程序中重定向到登录页面时如何显示“：无效的用户名和密码”

Question

我正在尝试通过操作类编写错误消息。错误消息为":Invalid username and password"，当我重定向到登录页面时应显示。

1. 我已经创建了ApplicationResource.properties文件。
2. 我写了error.add（“ invalid”，new ActionMessage（“ invalid certificate”））;

---

UserRegAction.java

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionErrors;

import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
//import com.opensymphony.xwork2.*;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;

import com.ex.form.*;
import com.ex.dao.*;


public class UserRegAction extends Action{

     public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
                throws Exception {

         //---obj of form class--------------------------------
         ActionErrors errors = new ActionErrors();
         UserRegForm lf=(UserRegForm) form;

         String username = lf.getUname();
         String password = lf.getPassword();

         //---httpsession ob----------------------------------

         HttpSession session=request.getSession();
         session.setAttribute("uname", username);
         session.setAttribute("password", password);

         //---ob of dao class------------------------------------

         LogicDao dao= new LogicDao();

         if(dao.check(username,password))
         {
             System.out.println("GOT");
                return mapping.findForward("success");
                }
            else
                {
        errors.add("invalid",new ActionMessage("invalid credentials"));
         saveErrors(request,errors);
          return (mapping.findForward("failure"));


                }

     }


}

Answer 1

对于失败情况，在配置XML中，对于上述JSP文件，请使用html：errors标记显示所有错误。如果只想显示特定错误，请使用html：error标记和消息键仅显示特定错误