78 lines
2.7 KiB
Java
78 lines
2.7 KiB
Java
package example.controller;
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import example.model.Computer;
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import example.model.User;
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import example.service.ICartService;
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import example.service.impl.CartServiceImpl;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.util.List;
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@WebServlet("/cart")
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public class CartServlet extends HttpServlet {
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ICartService cartService = new CartServiceImpl();
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@Override
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protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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String action = req.getParameter("action");
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switch (action){
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case "list":
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try {
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toCart(req, resp);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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break;
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case "add":
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try {
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addCart(req,resp);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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break;
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case "remove":
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try {
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removeFromCart(req, resp);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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break;
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default:
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req.getRequestDispatcher("/WEB-INF/jsp/cart.jsp").forward(req,resp);
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break;
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}
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}
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private void removeFromCart(HttpServletRequest req, HttpServletResponse resp) throws Exception {
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User user = (User) req.getSession().getAttribute("user");
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String id = req.getParameter("id");
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cartService.removeFromCart(Integer.parseInt(id),user.getId());
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try {
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toCart(req, resp);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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private void addCart(HttpServletRequest req, HttpServletResponse resp) throws Exception {
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String id = req.getParameter("id");
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User user = (User) req.getSession().getAttribute("user");
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cartService.addCart(Integer.parseInt(id),user.getId());
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req.setAttribute("msg","加购成功");
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req.getRequestDispatcher("/computerList").forward(req,resp);
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}
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private void toCart(HttpServletRequest req, HttpServletResponse resp) throws Exception {
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User user = (User) req.getSession().getAttribute("user");
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List<Computer> computers = cartService.myCart(user.getId());
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req.setAttribute("computers",computers);
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req.getRequestDispatcher("cart.jsp").forward(req,resp);
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}
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}
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