notloggedonexceptionhandler.java

j2ee源码

package com.leeman.wkexs.common.security;

import java.util.Locale;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpSession;
import javax.servlet.ServletException;
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 org.apache.struts.action.ExceptionHandler;
import org.apache.struts.config.ExceptionConfig;
import org.apache.struts.Globals;

import com.leeman.wkexs.web.base.*;

public class NotLoggedOnExceptionHandler extends ExceptionHandler{
	
	public ActionForward execute(
	Exception ex,
	ExceptionConfig ae,
	ActionMapping mapping,
	ActionForm formInstance,
	HttpServletRequest request,
	HttpServletResponse response)
	throws ServletException{
		
		HttpSession session = request.getSession();
		String langid = (String)session.getAttribute(BaseConstants.SESSION_LANG_ID);
				
		Cookie cookie[] = request.getCookies();
		int cookie_length = 0;
		if(cookie != null)
		{
			cookie_length =  cookie.length;
		}
		System.out.println("cookielength:" + cookie_length);
		for(int i=0; i<cookie_length; i++){
			System.out.println(cookie[i].getName() + "=" + cookie[i].getValue());
			
			if(cookie[i].getName().equals(BaseConstants.COOKIE_LANG_ID))
			{
				System.out.println("have cookie");
				if(langid == null || langid.equals("") || !validateLang_id(langid))
					langid=cookie[i].getValue();
					System.out.println("inside langid: " + langid);
			}
		}
		
		System.out.println("before getdefault langid: " + langid);
		
		if(langid == null || langid.equals("") || !validateLang_id(langid)){
			langid = getDefaultLangId();
		}
		
		session.setAttribute(BaseConstants.SESSION_LANG_ID, langid);
		SetSessionLocale(request, langid);
		
		return new ActionForward(ae.getPath());
	}
	
	//Validation on Get Cookie
	public boolean validateLang_id(String lang_id){
		boolean isValid = false;
		if(lang_id.equals(BaseConstants.LANG_ENGLISH)||lang_id.equals(BaseConstants.LANG_SIMPLIFIED_CHINESE)||lang_id.equals(BaseConstants.LANG_TRADITIONAL_CHINESE))
			isValid = true;
		else
			isValid = false;	
			return isValid;
	}
	
	//Get Default Lang ID
	private String getDefaultLangId(){
		return BaseConstants.LANG_TRADITIONAL_CHINESE;
	}
	
	public static void SetSessionLocale(HttpServletRequest request, String Lang_id){
		HttpSession session = request.getSession();
		if(Lang_id.equals(BaseConstants.LANG_ENGLISH))
			session.setAttribute(Globals.LOCALE_KEY,Locale.ENGLISH);
		else if(Lang_id.equals(BaseConstants.LANG_TRADITIONAL_CHINESE))
			session.setAttribute(Globals.LOCALE_KEY,new Locale("cht","cht"));
		else if(Lang_id.equals(BaseConstants.LANG_SIMPLIFIED_CHINESE))
			session.setAttribute(Globals.LOCALE_KEY,new Locale("chs","chs"));
	}
}