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Patryk Czarnik
java_dzienna_15_09
Commits
9f432933
Commit
9f432933
authored
Sep 29, 2022
by
Patryk Czarnik
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ProductBean i odczyt wszystkich
parent
d591e877
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ProductBean.java
PC26-SklepWeb/src/main/java/sklep/beans/ProductBean.java
+21
-0
products5.jsp
PC26-SklepWeb/src/main/webapp/products5.jsp
+28
-0
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PC26-SklepWeb/src/main/java/sklep/beans/ProductBean.java
0 → 100644
View file @
9f432933
package
sklep
.
beans
;
import
java.util.List
;
import
sklep.db.DBConnection
;
import
sklep.db.DBException
;
import
sklep.db.ProductDAO
;
import
sklep.model.Product
;
public
class
ProductBean
{
// Metoda wyląda jak getter, ale wewnątrznie czyta dane z bazy, a nie z własnej zmiennej.
public
List
<
Product
>
getAllProducts
()
throws
DBException
{
// za każdym razem otwieramy nowe połączenie - w prawdziwej aplikacji uznalibyśmy to za mało wydajne
try
(
DBConnection
db
=
DBConnection
.
open
())
{
ProductDAO
productDAO
=
db
.
productDAO
();
return
productDAO
.
readAll
();
}
}
}
PC26-SklepWeb/src/main/webapp/products5.jsp
0 → 100644
View file @
9f432933
<
%@
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 5
</title>
<link
rel=
"stylesheet"
type=
"text/css"
href=
"styl.css"
>
</head>
<body>
<h1>
Lista produktów - wersja 5 JSP z beanem
</h1>
<
%
--
Za
pomoc
ą
klasy
ProductBean
odczytamy
z
bazy
list
ę
produkt
ó
w
w
postaci
obiektowej
.
--
%
>
<jsp:useBean
id=
"bean"
class=
"sklep.beans.ProductBean"
/>
<c:forEach
var=
"product"
items=
"${bean.allProducts}"
>
<div
class=
"product"
>
<h3>
${product.productName}
</h3>
<div
class=
"price"
>
Cena: ${product.price}
</div>
<div
class=
"price"
>
VAT ${product.vat * 100}%
</div>
<c:if
test=
"${not empty product.description}"
>
<p>
${product.description}
</p>
</c:if>
</div>
</c:forEach>
</body>
</html>
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