logoffaction.java

本人课程设计时做的一个用struts框架实现的基于cmmi2的项目管理系统的原型。还有部分功能尚未实现

package com.cmmi2pms.logon;

import java.io.IOException;
import java.util.Hashtable;
import java.util.Locale;
import java.util.Vector;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
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;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.util.MessageResources;

import org.apache.log4j.Logger;

import com.cmmi2pms.common.*;


public final class LogoffAction extends Action {


// ---------------------------------------------------- Public Methods

	private static Logger logger = Logger.getLogger ("LogoffAction") ;
    /**
     * Logoff the user.
     * The event is logged if the debug level is >= Constants.DEBUG.
     *
     * @param mapping The ActionMapping used to select this instance
     * @param actionForm The ActionForm bean for this request (if any)
     * @param request The HTTP request we are processing
     * @param response The HTTP response we are creating
     *
     * @exception IOException if an input/output error occurs
     * @exception ServletException if a servlet exception occurs
     */
    public ActionForward perform(ActionMapping mapping,
         ActionForm form,
         HttpServletRequest request,
         HttpServletResponse response)
            throws IOException, ServletException {

      // Extract attributes we will need
      HttpSession session = request.getSession();
      

      // Log this user logoff
      if (session.getAttribute(com.cmmi2pms.common.Constants.USER_KEY) != null) {
        logger.info("LogonAction: User logoff in session: " + session.getId());
      }
           

      // Remove user login
      session.removeAttribute(com.cmmi2pms.common.Constants.USER_KEY);

      // Return success
      return (mapping.findForward("SUCCESS"));

    }

} // end LogoffAction