logoffaction.java

来自「本程序采用Struts结构开发一个小型的BBS论坛 ,论坛包括用户注册与登陆,主」· Java 代码 · 共 60 行

package emptyprj;

import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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.util.MessageResources;


public final class LogoffAction extends Action {

    private Log log =
        LogFactory.getLog("org.apache.struts.webapp.Example");


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

	// Extract attributes we will need
	Locale locale = getLocale(request);
	MessageResources messages = getResources(request);
	HttpSession session = request.getSession();

       /*
       User user = (User) session.getAttribute(Constants.USER_KEY);

	// Process this user logoff
	if (user != null) {
            if (log.isDebugEnabled()) {
                log.debug("LogoffAction: User '" + user.getUsername() +
                          "' logged off in session " + session.getId());
            }
	} else {
            if (log.isDebugEnabled()) {
                log.debug("LogoffActon: User logged off in session " +
                          session.getId());
            }
	}
      */

	session.removeAttribute(Constants.USER_KEY);
	session.invalidate();

	// Forward control to the specified success URI
	return (mapping.findForward("success"));

    }


}