Narzędzia Informatyki - Ćwiczenia 7


Poprzednie Następne
Temat: Transformacje XSLT   
Bardzo dobry kurs do XSLT znajduje się pod adresem: http://www.w3schools.com/xsl/default.asp

Przykładowa transformacja za pomocą JAVA

import java.io.File;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

public class Transform {

/**
* Performs an XSLT transformation, sending the results
* to System.out.
*/
public static void main(String[] args) throws Exception {
File xmlFile = new File("D:/DATA/PROJEKTY/KnowledgeBase/enviroment/workspace/FirstJavaProgram/src/book.xml");
File xsltFile = new File("D:/DATA/PROJEKTY/KnowledgeBase/enviroment/workspace/FirstJavaProgram/src/book.xsl");

// JAXP reads data using the Source interface
Source xmlSource = new StreamSource(xmlFile);
Source xsltSource = new StreamSource(xsltFile);

// the factory pattern supports different XSLT processors
TransformerFactory transFact =
TransformerFactory.newInstance();
Transformer trans = transFact.newTransformer(xsltSource);

trans.transform(xmlSource, new StreamResult("D:/DATA/PROJEKTY/KnowledgeBase/enviroment/workspace/FirstJavaProgram/src/book.out"));
trans.transform(xmlSource, new StreamResult(System.out));
}
}
Zadanie 1
Zamień plik:

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="book.xsl"?>
<catalog>
<book id="bk101">
<author>Gambardella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>An in-depth look at creating applications
with XML.</description>
</book>
<book id="bk102">
<author>Ralls, Kim</author>
<title>Midnight Rain</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-12-16</publish_date>
<description>A former architect battles corporate zombies,
an evil sorceress, and her own childhood to become queen
of the world.</description>
</book>
<book id="bk103">
<author>Corets, Eva</author>
<title>Maeve Ascendant</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-11-17</publish_date>
<description>After the collapse of a nanotechnology
society in England, the young survivors lay the
foundation for a new society.</description>
</book>
<book id="bk104">
<author>Corets, Eva</author>
<title>Oberon's Legacy</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2001-03-10</publish_date>
<description>In post-apocalypse England, the mysterious
agent known only as Oberon helps to create a new life
for the inhabitants of London. Sequel to Maeve
Ascendant.</description>
</book>
<book id="bk105">
<author>Corets, Eva</author>
<title>The Sundered Grail</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2001-09-10</publish_date>
<description>The two daughters of Maeve, half-sisters,
battle one another for control of England. Sequel to
Oberon's Legacy.</description>
</book>
<book id="bk106">
<author>Randall, Cynthia</author>
<title>Lover Birds</title>
<genre>Romance</genre>
<price>4.95</price>
<publish_date>2000-09-02</publish_date>
<description>When Carla meets Paul at an ornithology
conference, tempers fly as feathers get ruffled.</description>
</book>
<book id="bk107">
<author>Thurman, Paula</author>
<title>Splish Splash</title>
<genre>Romance</genre>
<price>4.95</price>
<publish_date>2000-11-02</publish_date>
<description>A deep sea diver finds true love twenty
thousand leagues beneath the sea.</description>
</book>
<book id="bk108">
<author>Knorr, Stefan</author>
<title>Creepy Crawlies</title>
<genre>Horror</genre>
<price>4.95</price>
<publish_date>2000-12-06</publish_date>
<description>An anthology of horror stories about roaches,
centipedes, scorpions and other insects.</description>
</book>
<book id="bk109">
<author>Kress, Peter</author>
<title>Paradox Lost</title>
<genre>Science Fiction</genre>
<price>6.95</price>
<publish_date>2000-11-02</publish_date>
<description>After an inadvertant trip through a Heisenberg
Uncertainty Device, James Salway discovers the problems
of being quantum.</description>
</book>
<book id="bk110">
<author>O'Brien, Tim</author>
<title>Microsoft .NET: The Programming Bible</title>
<genre>Computer</genre>
<price>36.95</price>
<publish_date>2000-12-09</publish_date>
<description>Microsoft's .NET initiative is explored in
detail in this deep programmer's reference.</description>
</book>
<book id="bk111">
<author>O'Brien, Tim</author>
<title>MSXML3: A Comprehensive Guide</title>
<genre>Computer</genre>
<price>36.95</price>
<publish_date>2000-12-01</publish_date>
<description>The Microsoft MSXML3 parser is covered in
detail, with attention to XML DOM interfaces, XSLT processing,
SAX and more.</description>
</book>
<book id="bk112">
<author>Galos, Mike</author>
<title>Visual Studio 7: A Comprehensive Guide</title>
<genre>Computer</genre>
<price>49.95</price>
<publish_date>2001-04-16</publish_date>
<description>Microsoft Visual Studio 7 is explored in depth,
looking at how Visual Basic, Visual C++, C#, and ASP+ are
integrated into a comprehensive development
environment.</description>
</book>
</catalog>

na format w postaci:

<?xml version="1.0" encoding="UTF-8"?>
<books>
<book>
<title>XML Developer's Guide</title>
<author>XML Developer's Guide</author>
<price>44.95</price>
</book>
<book>
<title>Midnight Rain</title>
<author>Midnight Rain</author>
<price>5.95</price>
</book>
<book>
<title>Maeve Ascendant</title>
<author>Maeve Ascendant</author>
<price>5.95</price>
</book>

...
... //WYCIETE Z PLIKU
...

</books>

Zadanie 2
Utwórz plik xslt zamieniający format poprzedniego wejściowego pliku xml na poniższy oraz wyświetlający tylko książki posiadające cenę mniejszą od 14.95:

<?xml version="1.0" encoding="UTF-8"?>
<books>
<book>
<title>Midnight Rain</title>
<author>Midnight Rain</author>
<price>5.95</price>
</book>
<book>
<title>Maeve Ascendant</title>
<author>Maeve Ascendant</author>
<price>5.95</price>
</book>

...
... //WYCIETE Z PLIKU
...

</books>
Zadanie 3
Wypisz wszystkie książki (o dowolnej cenie) w poniższym formacie. Jednak dodatkowo zakładamy, że wszystkie książki które posiadają cene >= 5.95 posiadają dodatkowo tag <promotion> okreslajacy nowa cenę produktu. Wynoszącą  90% poprzedniej ceny (now cena powinna być zaokrąglona do 2 miejsc po przecinku).