Putting It Together

The JSP in Listing B.1 shows some of the XML tags we have discussed, and Figure B.1 shows the corresponding output.
Figure B.1: The outout from the JSTL example
Listing B.1: An example JSP using JSTL XML tags
<%@ taglib uri="http://java.sun.com/jstl/xml" prefix="x" %>

<!-other JSP code->
<x:parse var="catalog" scope="application">
    <items>
        <item>
            <quantity>3</quantity>
            <productnumber>229AXH</productnumber>
                <description>High speed photocopier machine with automatic sensors
                                                                    </description>
            <unitcost>1939.99</unitcost>
        </item>
        <item>
            <quantity>1</quantity>
            <productnumber>1632</productnumber>
            <description>One box of color toner cartridges</description>
            <unitcost>43.95</unitcost>
        </item>
    </items>
</x:parse>
<b> forEach example </b>
c Here is the value stored in the "parseditems" variable
<x:forEach var="item" select="$applicationScope:catalog/items/*">
<br>     Item quantity: <x:out select="$item/quantity"/>
<br>     Item product number: <x:out select="$item/productnumber"/>
<br>     Item product number: <x:out select="$item/productdescription"/>
<br>     Item cost:$  <x:out select="$item/unitcost"/>
<br><br>
</x:forEach>
<hr>

<b> if example </b> <br>
<x:forEach var ="item" select="$applicationScope:catalog/items/*">
     <x: if<D>  select="$item/unitcost >1000">
     This item has a cost greater than $1000: <x:out select="$item/description"/>
     </x:if>
</x:forEach>

<hr>
<b> choose-when example </b><br>
<x:forEach var="item" select="$applicationScope:catalog/items/*">
<x:choose>
     <x:when  select="$item/unitcost >1000">
         This item has a cost greater than $1000: $ <x:out select="$item/unitcost"/>
         <br>  <x:out select="$item/description"/>
     </x:when>

     <x:when   select="$item/unitcost < 100">
          This item has a cost less than $100: $ <x:out select="$item/unitcost"/>
          <br> <x:out select="$item/description"/>
     </x:when>
</x:choose>
</x:forEach>
<hr>
<b> otherwise example </b> <br>
<x:forEach var="item" select="$applicationScope:catalog/items/*">
<x:choose>
     <x:when   select="$item/unitcost < 10">
          This item has a cost less than $10: $ <x:out select="$item/unitcost"/>
         <br> <x:out select="$item/description"/>
     </x:when>
     <x:otherwise>
        This item is more than $10 <x:out select="$item/description"/>
        <br>
     </x:otherwise>
</x:choose>
</x:forEach>