jsp与servlet实现购物车

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 {
		

	}

}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           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
     目录           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.settingsorg.eclipse.core.resources.prefs
     文件         364  2018-03-30 14:32  ShoppingCart.settingsorg.eclipse.jdt.core.prefs
     文件         495  2018-03-30 14:32  ShoppingCart.settingsorg.eclipse.wst.common.component
     文件         414  2018-03-30 14:32  ShoppingCart.settingsorg.eclipse.wst.common.project.facet.core.xml
     文件          49  2018-03-30 14:32  ShoppingCart.settingsorg.eclipse.wst.jsdt.ui.superType.container
     文件           6  2018-03-30 14:32  ShoppingCart.settingsorg.eclipse.wst.jsdt.ui.superType.name
     目录           0  2018-04-07 19:36  ShoppingCartWebRoot
     目录           0  2018-03-30 14:32  ShoppingCartWebRootmeta-INF
     文件          39  2018-03-30 14:32  ShoppingCartWebRootmeta-INFMANIFEST.MF
     目录           0  2018-03-30 14:32  ShoppingCartWebRootWEB-INF
     目录           0  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclasses
     目录           0  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclassesFilter
     文件        1941  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclassesFilterSessionFilter.class
     目录           0  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclassesServlet
     文件        7243  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclassesServletGoodsServlet.class
     文件        3232  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclassesServletSecurityServlet.class
     文件          65  2018-04-09 21:31  ShoppingCartWebRootWEB-INFclassesgoods.properties
     目录           0  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclassesjavabean
     文件        2108  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclassesjavabeanCart.class
     文件         767  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclassesjavabeanCartItem.class
     文件         836  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclassesjavabeanGood.class
     文件         732  2018-04-13 23:03  ShoppingCartWebRootWEB-INFclassesjavabeanUserMessage.class
     目录           0  2018-04-09 10:49  ShoppingCartWebRootWEB-INFlib
     文件      751238  2018-04-09 10:49  ShoppingCartWebRootWEB-INFlibcommons-collections4-4.1.jar
     文件      625967  2018-04-09 10:49  ShoppingCartWebRootWEB-INFlibcommons-configuration2-2.2.jar
     文件      499634  2018-04-09 10:49  ShoppingCartWebRootWEB-INFlibcommons-lang3-3.7.jar
............此处省略18个文件信息