showuserlistaction.java

用struts,ajax实现的聊天室

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package action;

import java.util.ArrayList;

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

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 bean.User;

import service.ChatService;
import xml.CheckXml;

/** 
 * MyEclipse Struts
 * Creation date: 09-11-2007
 * 
 * XDoclet definition:
 * @struts.action validate="true"
 */
public class ShowUserListAction extends Action {
	/*
	 * Generated Methods
	 */

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 * @throws Exception 
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws Exception {
		// TODO Auto-generated method stub
		ArrayList<User> users=new ArrayList<User>();
		HttpSession session=request.getSession();
        User user=(User)session.getAttribute("user");
        boolean has=ChatService.instance().validRoom(user); //验证是否已经被请出了房间
        if(has){
           users=ChatService.instance().getUserList(user);
           CheckXml.showUserList(response, users,has);
           return mapping.findForward(null);
        }
        else{
        	CheckXml.showUserList(response, users,has);
        	return mapping.findForward(null);
        }
	}
}