package?Filter;

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;
import?javax.servlet.http.HttpServletResponse;

public?class?SessionFilter?implements?Filter?{

	@Override
	public?void?destroy（）?{
		
	}

	@Override
	public?void?doFilter（ServletRequest?request?ServletResponse?response?FilterChain?chain）
			throws?IOException?ServletException?{
		HttpServletRequest?hrequest?=?（HttpServletRequest）?request;
		HttpServletResponse?hresponse?=?（HttpServletResponse）?response;

		
		String?username?=?（String）?hrequest.getSession（）.getAttribute（“username“）;

		if?（username?==?null）?{
			hresponse.sendRedirect（hrequest.getContextPath（）?+?“/login.jsp?flag=1“）;
		}?else?{
			chain.doFilter（hrequest?hresponse）;
		}

	}

	@Override
	public?void?init（FilterConfig?arg0）?throws?ServletException?{
		

	}

}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-03-30?14:32??ShoppingCart\
?????文件????????1349??2018-04-09?10:51??ShoppingCart\.classpath
?????文件????????1062??2018-03-30?14:32??ShoppingCart\.project
?????目錄???????????0??2018-04-05?13:15??ShoppingCart\.settings\
?????文件?????????564??2018-03-30?14:32??ShoppingCart\.settings\.jsdtscope
?????文件??????????66??2018-04-05?13:15??ShoppingCart\.settings\org.eclipse.core.resources.prefs
?????文件?????????364??2018-03-30?14:32??ShoppingCart\.settings\org.eclipse.jdt.core.prefs
?????文件?????????495??2018-03-30?14:32??ShoppingCart\.settings\org.eclipse.wst.common.component
?????文件?????????414??2018-03-30?14:32??ShoppingCart\.settings\org.eclipse.wst.common.project.facet.core.xml
?????文件??????????49??2018-03-30?14:32??ShoppingCart\.settings\org.eclipse.wst.jsdt.ui.superType.container
?????文件???????????6??2018-03-30?14:32??ShoppingCart\.settings\org.eclipse.wst.jsdt.ui.superType.name
?????目錄???????????0??2018-04-07?19:36??ShoppingCart\WebRoot\
?????目錄???????????0??2018-03-30?14:32??ShoppingCart\WebRoot\meta-INF\
?????文件??????????39??2018-03-30?14:32??ShoppingCart\WebRoot\meta-INF\MANIFEST.MF
?????目錄???????????0??2018-03-30?14:32??ShoppingCart\WebRoot\WEB-INF\
?????目錄???????????0??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\
?????目錄???????????0??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\Filter\
?????文件????????1941??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\Filter\SessionFilter.class
?????目錄???????????0??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\Servlet\
?????文件????????7243??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\Servlet\GoodsServlet.class
?????文件????????3232??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\Servlet\SecurityServlet.class
?????文件??????????65??2018-04-09?21:31??ShoppingCart\WebRoot\WEB-INF\classes\goods.properties
?????目錄???????????0??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\javabean\
?????文件????????2108??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\javabean\Cart.class
?????文件?????????767??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\javabean\CartItem.class
?????文件?????????836??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\javabean\Good.class
?????文件?????????732??2018-04-13?23:03??ShoppingCart\WebRoot\WEB-INF\classes\javabean\UserMessage.class
?????目錄???????????0??2018-04-09?10:49??ShoppingCart\WebRoot\WEB-INF\lib\
?????文件??????751238??2018-04-09?10:49??ShoppingCart\WebRoot\WEB-INF\lib\commons-collections4-4.1.jar
?????文件??????625967??2018-04-09?10:49??ShoppingCart\WebRoot\WEB-INF\lib\commons-configuration2-2.2.jar
?????文件??????499634??2018-04-09?10:49??ShoppingCart\WebRoot\WEB-INF\lib\commons-lang3-3.7.jar
............此處省略18個文件信息