基于MVC的JSP简单购物网站

package sunyang.webtier; import java.io.IOException; import java.util.ArrayList; import java.util.List; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import sunyang.dao.UserinfoDAO; import sunyang.domain.Shoppingcart; import sunyang.domain.Userinfo; import sunyang.util.*; public class UserinfoController extends HttpServlet { private static final long serialVersionUID = 1L; private UserinfoDAO ud; public UserinfoController() { ud = new UserinfoDAO(); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { switch (Integer.parseInt(request.getParameter("flag"))) { case 0: regist(request, response); break; case 1: login(request, response); break; case 2: logout(request,response); break; } } public void regist(HttpServletRequest request, HttpServletResponse response) { try { Chinese toc = new Chinese(); String name = request.getParameter("username"); String psw = request.getParameter("password"); Integer sex = Integer.parseInt(request.getParameter("sex")); String realname = toc.toChinese(request.getParameter("realname")); String tel = request.getParameter("tel"); String email = request.getParameter("email"); Userinfo u = new Userinfo(); u.setUsername(name); u.setPassword(psw); u.setSex(sex); u.setRealname(realname); u.setTel(tel); u.setEmail(email); List<Userinfo> lu = ud.findByUsername(name); if (lu.size() == 0) { if (ud.save(u)) { RequestDispatcher rd = request .getRequestDispatcher("registSuccess.jsp"); rd.forward(request, response); } else { request.setAttribute("errors", "用户注册失败！"); RequestDispatcher rd = request .getRequestDispatcher("errors.jsp"); rd.forward(request, response); } } else { request.setAttribute("errors", "用户名已经存在！"); RequestDispatcher rd = request .getRequestDispatcher("errors.jsp"); rd.forward(request, response); } } catch (Exception e) { e.printStackTrace(); } } public void login(HttpServletRequest request, HttpServletResponse response) { String name = request.getParameter("username"); String psw = request.getParameter("password"); try { List<Userinfo> lu = ud.findByUsername(name); if (!request.getParameter("safecode").equals( request.getSession().getAttribute("rand"))) { request.setAttribute("errors", "验证码错误！"); RequestDispatcher rd = request .getRequestDispatcher("errors.jsp"); rd.forward(request, response); } else if (lu.size() > 0 && lu.get(0).getPassword().equals(psw)) { request.getSession().setAttribute("userinfo", lu.get(0)); List<Shoppingcart> lsc = new ArrayList<Shoppingcart>(); request.getSession().setAttribute("Shoppingcart", lsc); RequestDispatcher rd = request .getRequestDispatcher("goods.do?flag=0"); rd.forward(request, response); } else { request.setAttribute("errors", "用户名或密码错误!"); RequestDispatcher rd = request .getRequestDispatcher("errors.jsp"); rd.forward(request, response); } } catch (Exception e) { e.printStackTrace(); } } public void logout(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.getSession().removeAttribute("userinfo"); request.getSession().removeAttribute("Shoppingcart"); RequestDispatcher rd = request.getRequestDispatcher("logout.jsp"); rd.forward(request, response); } }