package?com;

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.HttpServlet;
import?javax.servlet.http.HttpServletRequest;
import?javax.servlet.http.HttpServletResponse;
import?javax.servlet.http.HttpSession;

public?class?LoginFilter?extends?HttpServlet?implements?Filter?{

	public?void?doFilter（ServletRequest?request?ServletResponse?response
			FilterChain?chain）?throws?IOException?ServletException?{
		
		//得到session
		HttpServletRequest?requ?=?（HttpServletRequest）request;
		HttpSession?session?=?requ.getSession（）;
		
		//取得session的值
		String?userName?=?（String）session.getAttribute（“userName“）;
		if（userName?==?null?||?““.equals（userName））{
			request.getRequestDispatcher（“fail.jsp“）.forward（request?response）;
		}else{
			chain.doFilter（request?response）;
		}
	}

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

	}

	public?LoginFilter（）?{
		super（）;
	}

	public?void?destroy（）?{
		super.destroy（）;

	}

	public?void?doGet（HttpServletRequest?request?HttpServletResponse?response）
			throws?ServletException?IOException?{

	}

	public?void?doPost（HttpServletRequest?request?HttpServletResponse?response）
			throws?ServletException?IOException?{

	}

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

	}

}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????340??2009-05-26?14:36??驗證用戶有沒有登陸的過濾器\loginfilter\.classpath

?????文件????????306??2009-05-26?14:36??驗證用戶有沒有登陸的過濾器\loginfilter\.mymetadata

?????文件???????1229??2009-05-26?15:10??驗證用戶有沒有登陸的過濾器\loginfilter\.project

?????文件???????1529??2009-05-26?15:12??驗證用戶有沒有登陸的過濾器\loginfilter\src\com\LoginFilter.java

?????文件????????819??2009-05-26?15:11??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot\fail.jsp

?????文件????????834??2009-05-26?14:36??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot\index.jsp

?????文件?????????39??2009-05-26?14:36??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot\meta-INF\MANIFEST.MF

?????文件???????2224??2009-05-26?15:12??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot\WEB-INF\classes\com\LoginFilter.class

?????文件???????1033??2009-05-26?15:09??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot\WEB-INF\web.xml

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot\WEB-INF\classes\com

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot\WEB-INF\classes

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot\WEB-INF\lib

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器\loginfilter\src\com

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot\meta-INF

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot\WEB-INF

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器\loginfilter\.myeclipse

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器\loginfilter\src

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器\loginfilter\WebRoot

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器\loginfilter

?????目錄??????????0??2009-05-26?15:14??驗證用戶有沒有登陸的過濾器

-----------?---------??----------?-----??----

?????????????????8353????????????????????20