cssresultdispatcher.java

本源码为教学管理信息系统

package com.hibernate.action;

import javax.servlet.RequestDispatcher;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.PageContext;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.opensymphony.webwork.ServletActionContext;
import com.opensymphony.webwork.dispatcher.ServletDispatcherResult;
import com.opensymphony.webwork.dispatcher.WebWorkResultSupport;
import com.opensymphony.xwork.ActionInvocation;

/**
 * @author Administrator
 *
 */
public class CssResultDispatcher extends WebWorkResultSupport {

    private static final Log log = LogFactory.getLog(ServletDispatcherResult.class);

    public void doExecute(String finalLocation, ActionInvocation invocation) throws Exception {
        if (log.isDebugEnabled()) {
            log.debug("Forwarding to location " + finalLocation);
        }

        PageContext pageContext = ServletActionContext.getPageContext();

        if (pageContext != null) {
            pageContext.include(finalLocation);
        } else {
            HttpServletRequest request = ServletActionContext.getRequest();
            HttpServletResponse response = ServletActionContext.getResponse();
            RequestDispatcher dispatcher = request.getRequestDispatcher(finalLocation);

            // if the view doesn't exist, let's do a 404
            if (dispatcher == null) {
                response.sendError(404, "result '" + finalLocation + "' not found");

                return;
            }
			request.setAttribute("navigation", GetStyleCookie(request, response));
            // If we're included, then include the view
            // Otherwise do forward 
            // This allow the page to, for example, set content type 
            if (!response.isCommitted() && (request.getAttribute("javax.servlet.include.servlet_path") == null)) {
                request.setAttribute("webwork.view_uri", finalLocation);
                request.setAttribute("webwork.request_uri", request.getRequestURI());

                dispatcher.forward(request, response);
            } else {
                dispatcher.include(request, response);
            }
        }
    }

	private StringBuffer GetStyleCookie(HttpServletRequest request,HttpServletResponse response) {
		StringBuffer style = new StringBuffer();
		try {
			Cookie cookies[] = request.getCookies();
			Cookie Cookie = null;
			String CookieName = null;
			String CookieValue = "Default";
			if (cookies == null) {
				Cookie _cookie = new Cookie("UserStyle", "Default");
				_cookie.setMaxAge(0x1e13380);
				response.addCookie(_cookie);
			} else {
				for (int i = 0; i < cookies.length; i++) {
					Cookie = cookies[i];
					CookieName = Cookie.getName();
					if (CookieName.equals("UserStyle"))
						CookieValue = Cookie.getValue();
				}

			}
			
			style.append("<link rel=\"stylesheet\" href=\"/css/" + CookieValue + ".css\">");
			style.append("<link rel=\"stylesheet\" href=\"/css/Others.css\">");
		} catch (Exception e) {
			e.printStackTrace();
			style.append("<link rel=\"stylesheet\" href=\"/css/FenSeHuiYi.css\">");
			style.append("<link rel=\"stylesheet\" href=\"/css/Others.css\">");			
		}
		return style;
	}
}