JSTL: forEach and status
It is not a good programming practice to use directive
to set the attribute in a bean or a map when we are using the jstl. Instead of
using directive we can use the <c:set> tag of jstl.
In this program we are going to use the tag
<c: set>. By using this tag we are setting an attribute variable var.
If there is not a page- scoped attribute named movies, then this tag
creates one, it will assume that the value attribute is not null. If the
value is null then it will delete the var attribute. The var
tag is required. The attribute
scope is optional in
this tag. In <c: forEach> tag we have used some attributes like var
which will help us to iterate the values i.e. movies. The attribute items
which will help us to get the attribute. The varStatus
attribute makes a new variable that holds an instance of javax.servlet.jsp.jstl.core.LoopTagStatus.
Use <c:out> to display the result to the
browser.
The forEach has one scoped variable called count.
The LoopTagStatus class has a count property which gives us the current
value of the iteration counter.
The code of the program is given below:
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<c:set var="movies" value="Sholay, Maine Pyar kiya, Jai Santoshi Maa, Krish" scope="page" />
<html>
<head>
<title>forEach and status</title>
</head>
<body>
<h1>The forEach has one scoped variable called 'count', it tells the
current position of the element within the collection. </h1>
<c:forEach items="${pageScope.movies}" var="currentName" varStatus="status" begin="0" end="3" step="1">
Movie Names :<c:out value="${status.count}" /> is
<c:out value="${currentName}" /> <br />
</c:forEach>
</body>
</html> |
The output of the program is given below:
Download this
example.
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Del.icio.us
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Y! MyWeb
