Iterator Tags

The <c:forEach> tag allows you to iterate over a collection of objects. You specify the collection via "items" attribute, and the current item is available through a variable named given in the "var" attribute. A large number of collection types are supported by <c:forEach>, including all implementations of java.util.Collection and java.util.Map. If given collection is of type java.util.Map, then the current item will be of type java.util.Map.Entry, which has the following properties:

• key: The key under which the item is stored in the underlying Map


• value: The value that corresponds to the key

<c:forEach var="item" items="collection">
</c:forEach>
or

<c:forEach begin="0" end="10" varStatus="status" step="1" >

</c:forEach>

URL Tags

The <c:url> tag is used to create the URL for the submit actions or the hyperlinks. The <c:url> tag is used to create the URL variable and <c:param> is used to add the parameters in the <c:url> tag. The syntax is as follows:-

<c:url var="var" value="..." >
<c:param name="param1" value="val1" />
</c:url>

Example:-

<%@ taglib uri="/WEB-INF/c.tld" prefix="c" %>
<%
    String[] value = new String[10];
    value[0]="one";
    value[1]="two";
    value[2]="three";
    value[3]="four";
    value[4]="five";
    value[5]="six";
    value[6]="seven";
    value[7]="eight";
    value[8]="nine";
    value[9]="ten";
    pageContext.setAttribute("values",value);
%>
<b>Iterator For loop <br></b>
<c:forEach var="item" varStatus="status" items="${values}">
    Place <c:out value="${status.index}"/> value is <c:out value="${item}"/><br>
</c:forEach>
<br>
<b>Coventional For Loop<br></b>
<c:forEach begin="0" end="10" varStatus="status" step="1" >
    Place <c:out value="${status.index}"/> value is <c:out     value="${values[status.index]}"/><br>
</c:forEach>

<c:url var="yahoo" value="http://www.yahoo.com"/>

<a href="${yahoo}">yahoo url</a>