Expression Language in JSP

Learn: What is Expression Language in JSP? In this post we are explaining use of EL in JSO with suitable example?
By: Vanka Manikanth, on 26 FEB 2017

Expression Language (EL) makes ease for programmers to put out the values on to the screen instead writing a print statement. So, here we provided a simple and clear example where you can understand the EL use in JSP.

index.jsp

Here we are taking the inputs from the user and triggering the action to output.jsp with a POST method.

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
		<title>EL</title>
		<style type="text/css">
			body{
			text-align:center;
			}
			p{
			font-size:16pt;
			}
			h1{
			background-color:yellow;
			}
		</style>
	</head>
	<body>
		<h1>EXPRESSION LANGUAGE IN JSP</h1>
		<form action="output.jsp" method="post">
		<p><label>USER NAME :</label>
		<input type="text" name="username"></p>
		<p><label>EMAIL ID :</label>
		<input type="email" name="email"></p>
		<p><label>GENDER : </label>
		<input type="radio" name="gender" value="Male">MALE
		<input type="radio" name="gender" value="Female">FEMALE</p>
		<p>
		<label>USER DIVISION :</label>
		<select name="division" required>
		<option value="">Select</option>
		<option value="East">East</option>
		<option value="West">West</option>
		<option value="North">North</option>
		<option value="south">South</option>

		</select>
		</p>
		<button>SAVE DETAILS</button>

		</form>
	</body>
</html>

output.jsp

Here we are just printing out the values which are taken at the index page with a $(dollar) prefix.

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
		<title>EL</title>
	</head>
	<body>
		<jsp:include page="index.jsp"></jsp:include>
		<p>ENTERED DETAILS ARE :</p>
		<p>USER NAME IS : ${param.username}</p>
		<p>EMAIL ID IS : ${param.email}</p>
		<p>GENDER  IS : ${param.gender}</p>
		<p>DIVISION  IS : ${param.division}</p>
	</body>
</html>

param.(property) -> prints out the value which is named at index.jsp

Output:

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