网上购物系统设计与实现

【文件属性】：
文件名称：网上购物系统设计与实现
文件大小：1.29MB
文件格式：DOC
更新时间：2015-12-28 10:55:17
网上购物 网上购物系统设计和实现课程设计 四、程序关键代码及效果图 1、过滤器代码：［只要doFilter()方法］ （1）adminfilter.java: HttpServletRequest requ=(HttpServletRequest)req; res.setCharacterEncoding("gb18030"); requ.setCharacterEncoding("gb18030"); HttpSession session=requ.getSession(); if(session.getAttribute("admin")==null){ PrintWriter out=res.getWriter(); out.println("[removed]"); out.println("alert('您还没有登录！');"); out.println("[removed].href='../login_admin.jsp';"); out.println("[removed]"); }else{ chain.doFilter(req, res); } （2）userfilter.java: HttpServletRequest requ=(HttpServletRequest)req; res.setCharacterEncoding("gb18030"); requ.setCharacterEncoding("gb18030"); HttpSession session=requ.getSession(); if(session.getAttribute("uname")==null){ PrintWriter out=res.getWriter(); out.println("[removed]"); out.println("alert('您还没有登录！');"); out.println("[removed].href='../login.html';"); out.println("[removed]"); }else{ chain.doFilter(req, res); } (3)Encodingfilter.java: HttpServletRequest request=(HttpServletRequest)req; request.setCharacterEncoding("gb18030"); HttpServletResponse response=(HttpServletResponse)res; response.setCharacterEncoding("gb18030"); chain.doFilter(req, res); } 2、Servlet代码：［只要doPost()或doGet()方法］ （1）add.java: response.setContentType("text/html"); request.setCharacterEncoding("gb18030"); HttpSession session=request.getSession(); CartBean cb=new CartBean(); Vector cart =(Vector)session.getAttribute("cart"); String id=request.getParameter("id"); if(cart==null){ cart=new Vector(); } cart=cb.addCart(cart,id); session.setAttribute("cart",cart); response.sendRedirect("cart.jsp"); } （2）addproduct.java: PrintWriter out=response.getWriter(); Product p = new Product(); SmartUpload su = new SmartUpload(); su.initialize(this.getServletConfig(), request, response); su.setMaxFileSize(1024 * 1024 * 10); su.setAllowedFilesList("JPG,jpg,gif,GIF");