FrontPageJumpInterceptor.java

package com.sp2p.system.interceptor;

import java.util.Map;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.interceptor.RequestAware;
import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;
import com.shove.vo.HelpMessage;
import com.shove.web.action.BaseAction;
import com.sp2p.constants.IConstants;
import com.sp2p.system.exception.FrontHelpMessageException;

/**
 * 前台登录跳转
 * 
 * @author 杨程
 * @Create Jun 3, 2011
 * 
 */
public class FrontPageJumpInterceptor implements Interceptor, SessionAware {
	public static Log log = LogFactory.getLog(FrontPageJumpInterceptor.class);
	private static final long serialVersionUID = 1L;
	private HttpServletRequest request;
	private HttpServletResponse response;
	public Map<String, Object> sessionMap;

	public void destroy() {
	}

	public void init() {
	}

	public String intercept(ActionInvocation invocation) throws Exception {
		request = ServletActionContext.getRequest();
		response = ServletActionContext.getResponse();
		String result;
		try {
			result = invocation.invoke();
		} catch (FrontHelpMessageException e) {
			//BaseAction action = (BaseAction) invocation.getAction();
			//HelpMessage helpMessage = action.getHelpMessage();
//			try {
//				//request.setAttribute("title", helpMessage.getTitle());
//			} catch (Exception ee) {
//			}
			//sessionMap.put("helpMessage", helpMessage);
			if (isAjaxRequest()) {
				response.getWriter().print(IConstants.FRONTPAGEJUMP);
				return null;
			} else {
				return IConstants.FRONTPAGEJUMP;
			}
		}
		return result;
	}

	private boolean isAjaxRequest() {
		String header = request.getHeader("X-Requested-With");
		if (header != null && "XMLHttpRequest".equals(header)) {
			return true;
		}
		return false;
	}

	@Override
	public void setSession(Map<String, Object> session) {
		this.sessionMap = session;
	}

}