使用继承来用Action实现过滤器的目的

1.先建立一个Action

package com.jane.strutsdemo.actionbase;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

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

public abstract class Auth extends Action {

 public ActionForward execute(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response)
   throws Exception {
   if(request.getSession().getAttribute("user")==null){
      return new ActionForward("/error.jsp");
   }
  return doExecute(mapping,form,request,response);
 }
 
 public abstract ActionForward doExecute(ActionMapping mapping, ActionForm actionForm, HttpServletRequest  request, HttpServletResponse response) ;
 
}
2.在建立一个Action来继承上面的Action

package com.jane.strutsdemo.struts.action;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

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

import com.jane.strutsdemo.actionbase.Auth;

public class LoginAction extends Auth {

 public ActionForward doExecute(ActionMapping mapping,
   ActionForm actionForm, HttpServletRequest request,
   HttpServletResponse response) {
  // TODO Auto-generated method stub
  return mapping.findForward("success");
 }

}
3.配置Struts_config.xml文件，只需要配置子类Action和From就可以了

文件:	StrutsDemo.rar
大小:	19KB
下载:	下载

还有一种就是继承的DispatchAction