resultdispatcher.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.ActionContext;
import com.opensymphony.xwork.ActionInvocation;
import com.opensymphony.xwork.util.OgnlValueStack;

/**
 * @author Administrator 带导航的请求分发
 */
public class ResultDispatcher 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;
			}
			String isPortal = (String) ActionContext.getContext().getSession()
					.get("IsPortal");
			if(isPortal != null){
				if (isPortal.equals("1")) {
	
				} else {
					OgnlValueStack stack = ActionContext.getContext()
							.getValueStack();
					String navigation = (String) stack.findValue("navigation");
					StringBuffer sb = new StringBuffer();
					sb.append("<br><center>");
					sb.append("<table width=\"90%\" border=0>");
					sb.append("<tr>");
					sb.append("<td align=left bgcolor=\"#EEEEEE\">" + navigation
							+ "</td>");
					sb.append("</tr>");
					sb.append("</table>");
					sb.append("<br>");
					sb.append(GetStyleCookie(request, response).toString());
					request.setAttribute("navigation", sb);
				}
			}
			// 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/Default.css\">");
			style.append("<link rel=\"stylesheet\" href=\"/css/Others.css\">");			
		}
		return style;
	}
}