Apart from operators, JSP also provide expression language implicit objects. The role of these implicit objects is to get the attribute associated with various object. Here, is the list of expression language implicit objects with their purposes.

Implicit Object	Description
requestScope	Fetches the attribute associated with request object.
sessionScope	Fetches the attribute associated with session object.
pageScope	It provides the attribute associate within pageScope.
applicationScope	Fetches the attribute associated with application object.
param	It retrieves the single value associated with request parameter.
paramValues	It retrieves the array of values associated with request parameter.
header	It retrieves the single value associated with header parameter.
headerValues	It retrieves the array of values associated with header parameter.
cookie	It is used to get the value of cookies.
initParam	It is used to map an initialize parameter.
pageContext	The role of this object is similar to JSP pageContext implicit object.

Example of Expression Language Implicit Object

This example shows the way of using various expression language implicit objects.

index.jsp

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Tutorial and Example</title>
</head>
<body>
<%
request.setAttribute("Tutorial", "Java");
application.setAttribute("Tutorial", "Python");
request.getSession().setAttribute("Tutorial", "PHP");
%>
<center>
Host name:
${header["host"]} <br>
Path name:
${pageContext.request.contextPath} <br>
Tutorials: <br>
${requestScope.Tutorial} <br>
${applicationScope.Tutorial} <br>
${sessionScope.Tutorial} <br>
</center>
</body>
</html>

Output:

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JSP EL Implicit Objects