One is the JSP Standard Tag Library expert group, and the other is the JSP … JSP Expression Language provides the facility to access the properties of java bean components or other implicit object. See my answer at Javascript String.replace(/\$/,str) works weirdly in jsp file for possible reasons. An extension of the JSTL 1.0 expression language has been proposed, however, for inclusion in the JSP 2.0 specification, now undergoing final review. When the scripting language is the Java programming language, an expression is transformed into a statement that converts the value of the expression into a String object and inserts it into the implicit out object. A JSP expression element contains a scripting language expression that is evaluated, converted to a String, and inserted where the expression appears in the JSP file. See above answer for potential reasons, and ways how to enable it. For example, the JSP expression language allows a page author to access a bean using simple syntax such as ${name} for a simple variable or ${name.foo.bar} for a nested property. An expression language makes it possible to easily access application data stored in JavaBeans components. There are many implicit objects, operators and reserve words in EL. C. JSP containing this directive should be treated as well-formed xml file. For now, the expression language is only available for specifying dynamic attribute values in JSTL custom tags. It is introduced in the JSP version 2.0. Example: test.jsp It is the newly added feature in JSP technology version 2.0. The JSP Expression tag transforms the code into an expression statement that converts into a value in the form of string object and insert into the implicit output object. General syntax of expression language is ${expression} If given attribute is not found or expression returns null instead of throwing any exception. JSP Expression. The JSP Expression Language (EL) The remainder of this chapter will discuss the JSP expression language. JSP EL Overview : Expression language (EL) has been introduced in JSP 2.0. Unified Expression Language. JSP specification provides another convenient way (Expression Language) to minimize the use of scripting tag in JSP because writing java code is not easy for web designers. B. JSP containing this directive should not have any Expression Language Code. D. This directive indicate that JSP is Thread Safe. Syntax of JSP tag A JSP expression is used to insert the value of a scripting language expression, converted into a string, into the data stream returned to the client. The Expression Language (EL) simplifies the accessibility of data stored in the Java Bean component, and other objects like request, session, application etc.. The expression language introduced in JSP 2.0 allows page authors to … The expression language has been developed by two expert groups at the Java Community Process. The main purpose of it to simplify the process of accessing data from bean properties and from implicit objects.By using JSP Expression Language you can get data from javaBeans,maps,arrays and lists that have been stored as attributes of a web application. We can write both arithmetic and logical expressions using JSP Expression Language. JSP Expressions. The EL and JSP 2.0. # Syntax for Expression Language (EL) Sometimes, Expression Language can be disabled. Expression Tag in JSP is used for writing your content on client side. The primary new feature of JSP 2.1 is the unified expression language (unified EL), which represents a union of the expression language offered by JSP 2.0 and the expression language created for JavaServer Faces technology (see Chapter 10, JavaServer Faces Technology) version 1.0.. Longer answer: ${i} is expression in so called 'Expression Language'. Because the value of an expression is converted to a String, you can use an expression within a line of text, whether or not it is tagged with HTML, in a JSP file. We can use this tag for displaying information on client browser.