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java_weekendowa_20221008
Commit 3776e632 by Patryk Czarnik
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"koszyk globalny" za pomocą ServletContext

parent f5f627b9
Showing with 108 additions and 0 deletions
PC25-SklepWeb/src/main/java/sklep/basket/AddToBasket.java 0 → 100644
package sklep.basket;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import sklep.db.DBConnection;
import sklep.db.ProductDAO;
import sklep.model.Product;
@WebServlet("/AddToBasket")
public class AddToBasket extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
int id = Integer.parseInt(request.getParameter("productId"));
try(DBConnection db = DBConnection.open()) {
ProductDAO productDAO = db.productDAO();
Product product = productDAO.findById(id);
ServletContext context = this.getServletContext();
Basket basket = (Basket) context.getAttribute("basket");
if(basket == null) {
basket = new Basket();
context.setAttribute("basket", basket);
}
basket.addProduct(product);
}
} catch(Exception e) {
// ignorujemy błędy
}
// Przekierowanie - każemy przeglądarce wejść pod ten adres.
response.sendRedirect("products8.jsp");
}
}
PC25-SklepWeb/src/main/webapp/products8.jsp 0 → 100644
<%@page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Lista produktów 8</title>
<link rel="stylesheet" type="text/css" href="styl.css">
</head>
<body>
<h1>Lista produktów - wersja 8</h1>
<jsp:useBean id="bean" class="sklep.web.ProductBean"/>
<div class="koszyk">
<h4>Koszyk</h4>
<ul>
<%-- Zauważmy, że dla obiektu koszyk nie wykonujemy już useBean.
Po prostu zakładamy, że jest obecny (w sesji). Gdyby go nie było, to pętla się nie wykona. --%>
<c:forEach var="elm" items="${basket.elements}">
<li>${elm.productName} (${elm.quantity}) za <b>${elm.value}</b></li>
</c:forEach>
</ul>
<p class="total">Do zapłaty: ${basket.totalValue}</p>
</div>
<form id="wyszukiwarka" method="get">
<h2>Filtr cen</h2>
<table class="formularz">
<tr><td><label for="min_price">Cena minimalna:</label></td>
<td><input type="number" name="min_price" value="${param.min_price}"></td></tr>
<tr><td><label for="max_price">Cena maksymalna:</label></td>
<td><input type="number" name="max_price" value="${param.max_price}"></td></tr>
<tr><td><button>Szukaj</button></td></tr>
</table>
</form>
<div>Produkty o cenach
<c:if test="${not empty(param.min_price)}">
od ${param.min_price}
</c:if>
<c:if test="${not empty(param.max_price)}">
do ${param.max_price}
</c:if>
</div>
<jsp:setProperty name="bean" property="minPrice" param="min_price"/>
<jsp:setProperty name="bean" property="maxPrice" param="max_price"/>
<c:forEach var="p" items="${bean.filteredProducts}">
<div class="product">
<img class="photo" src="Photo?productId=${p.productId}" alt=""/>
<h3>${p.productName}</h3>
<div class="price">Cena: ${p.price}</div>
<div class="price">VAT ${p.vat * 100}%</div>
<c:if test="${not empty p.description}">
<p>${p.description}</p>
</c:if>
<div><a href="AddToBasket?productId=${p.productId}">dodaj do koszyka</a></div>
</div>
</c:forEach>
</body>
</html>
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