In Java Server Pages (JSP), a taglib is a library of custom tags that can be used to include dynamic content in a JSP page. A taglib consists of one or more tag handler classes and a tag library descriptor (TLD) file that defines the tags and their attributes.
Here's an example of how to use a taglib in a JSP page:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
<c:forEach var="i" begin="1" end="10">
<c:out value="${i}" />
</c:forEach>
</body>
</html>
In this example, we're using the JSTL (JavaServer Pages Standard Tag Library) taglib, which provides a set of custom tags for common tasks such as iteration, conditional evaluation, and output formatting. The taglib directive at the top of the page specifies the URI of the taglib and a prefix that can be used to identify the tags in the taglib.
The forEach tag is a custom tag from the JSTL taglib that allows you to iterate over a range of numbers. The out tag is a custom tag from the JSTL taglib that allows you to output the value of a variable.
You can find more information about taglibs and how to use them in JSP pages in the JSP documentation.