JSP and JSTL Tutorials - Tutorial Addendum - JSTL - Amount Library
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c:forEach Action
<c:forEach var="name" items="expression"
begin="expression" end="expression" step="expression">
body
</c:forEach>
If the "items" aspect is specified, it will be acclimated to analyze an arrangement or
collection object, the elements in the arrangement or accumulating will be iterated.
At anniversary iteration, the accepted aspect will accredit to a called capricious specified
in the "var" attribute, and physique will be processed. If the "begin", "end" or "step"
attribute is specified, it will be acclimated to bind the alpha element,
the catastrophe element, or the move admeasurement of the iteration.
If the "items" aspect is not specified, an basis accumulation will be acclimated to
iterate from the "begin" amount to the "end" amount dispatch with the "step" value.
The c:forEach activity serves agnate purposes as the Java for statement. But there
is no breach mechanism.
c:forTokens Action
<c:forTokens var="name" items="expression" delims="expression"
begin="expression" end="expression" step="expression">
body
</c:forTokens>
The cord defined by the "items" aspect will be tokenized with
the delimiter defined by the "delims" attribute. Then consistent tokens
will be iterated. At anniversary iteration, the accepted badge will accredit
to a called capricious specified
in the "var" attribute, and physique will be processed.
If the "begin", "end" or "step"
attribute is specified, it will be acclimated to bind the alpha element,
the catastrophe element, or the move admeasurement of the iteration.
JSTL Amount Archetype - JstlObjects.jsp
As my first JSTL amount example, JstlObjects.jsp, is to use c:forEach to browse
through all the absolute objects, and c:forTekons to breach the chic aisle into
multiple items.
<?xml version="1.0"?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"
xmlns:c="http://java.sun.com/jstl/core" version="1.2">
<!-- JstlObjects.jsp
Absorb (c) 2003 by Dr. Yang
-->
<jsp:directive.page contentType="text/html"/>
<html><body>
<p>Browsing all the JSTL absolute objects:</p>
<p>"pageContext":</p>
<c:out value="${pageContext}"/><br/>
<p>"pageScope":</p>
<c:forEach items="${pageScope}" var="entry">
<c:out value="${entry}"/><br/>
</c:forEach>
<p>"requestScope":</p>
<c:forEach items="${requestScope}" var="entry">
<c:out value="${entry}"/><br/>
</c:forEach>
<p>"sessionScope":</p>
<c:forEach items="${sessionScope}" var="entry">
<c:out value="${entry}"/><br/>
</c:forEach>
<p>"applicationScope":</p>
<c:forEach items="${applicationScope}" var="entry">
<c:out value="${entry}"/><br/>
</c:forEach>
<p>"param":</p>
<c:forEach items="${param}" var="entry">
<c:out value="${entry}"/><br/>
</c:forEach>
<p>"paramValues":</p>
<c:forEach items="${paramValues}" var="entry">
<c:out value="${entry}"/><br/>
</c:forEach>
<p>"header":</p>
<c:forEach items="${header}" var="entry">
<c:out value="${entry}"/><br/>
</c:forEach>
<p>"headerValues":</p>
<c:forEach items="${headerValues}" var="entry">
<c:out value="${entry}"/><br/>
</c:forEach>
<p>"cookie":</p>
<c:forEach items="${cookie}" var="entry">
<c:out value="${entry}"/><br/>
</c:forEach>
<p>"initParam":</p>
<c:forEach items="${initParam}" var="entry">
<c:out value="${entry}"/><br/>
</c:forEach>
<p>Class aisle list:</p>
<c:forTokens
items="${applicationScope[ org.apache.catalina.jsp_classpath ]}"
delims=";" var="entry">
<c:out value="${entry}"/><br/>
</c:forTokens>
</body></html>
</jsp:root>
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