package?cn.itcast.LabManagement;

import?java.io.IOException;

import?javax.servlet.Filter;
import?javax.servlet.FilterChain;
import?javax.servlet.FilterConfig;
import?javax.servlet.ServletException;
import?javax.servlet.ServletRequest;
import?javax.servlet.ServletResponse;
import?javax.servlet.http.HttpServletRequest;

public?class?LoginFilter?implements?Filter?{

	public?void?doFilter（ServletRequest?request?ServletResponse?response
			FilterChain?chain）?throws?IOException?ServletException?{

		HttpServletRequest?req?=?（HttpServletRequest）?request;
		object?user?=?req.getSession（）.getAttribute（“sessionUser“）;
		if（user?==?null）?{
			req.setAttribute（“msg“?“請登錄系統！“）;
			req.getRequestDispatcher（“/adminjsps/msg.jsp“）.forward（req?response）;
		}?else?{
			chain.doFilter（request?response）;
		}
	}

	public?void?init（FilterConfig?fConfig）?throws?ServletException?{

	}

	@Override
	public?void?destroy（）?{
		//?TODO?Auto-generated?method?stub
		
	}
}