Expression Language(EL) In JSP

The Expression Language (EL) clarifies the availability of information saved withinside the Java Bean component, and different items like request, session, application, etc.

There are many implicit objects, operators, and reserve phrases in EL.

It is the latest added characteristic in JSP technology version 2.0

Syntax of Expression Language (EL)

${ expression }

Implicit Objects in Expression Language (EL)

Many implicit objects are there in the Expression Language. All are given below:

EL Param Example

In this example, we've produced documents index.jsp and process.jsp. The index.jsp document receives input from the person and sends the request to the process.jsp which in turn prints the identity of the person using EL.

index.jsp

<form action="process.jsp">  
Enter Name:<input type="text" name="name" /><br/><br/>  
<input type="submit" value="go"/>  
</form>

process.jsp

Welcome, ${ param.name } 

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EL Session Scope Example

In this example, we print the information saved withinside the session scope the usage of EL. For this motive, we've made use of a sessionScope object.

index.jsp

<h3>welcome to index page</h3>  
<%  
session.setAttribute("user","sonoo");  
%>  

<a href="process.jsp">visit</a>

process.jsp

Value is ${ sessionScope.user }  

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EL Cookie Example

index.jsp

<h1>First JSP</h1>  
<%  
Cookie ck=new Cookie("name","abhishek");  
response.addCookie(ck);  
%>  
<a href="process.jsp">click</a>

process.jsp

Hello, ${cookie.name.value}

Precedence of Operators in JSP

Many operators have been given in the expression language. And their precedence is given below:

Reserve words in EL

Many Reserve words are there in the Expression Language that is given below: