JSP Scriptlet Tag

Scriptlet is used to include some Script(it can hold one or more java instructions.)Which is placed directly into the _jspService()method.

A JSP scriptlet is used to contain any code fragment that is valid for the scripting language used in a page. The syntax for a scriptlet is as follows:

<% scripting-language-statements %>

Example Explanation

we have already seen how to embed java expression in JSP pages by putting them between the<%= and% > character sequences.

JSP also you to write blocks of java code inside the JSP.
To do this by placing java code between<% and %>characters(just like expressions,but without the=sign at the start of the sequence.)
This block of code is known as a "Scriptlet".

When the scripting language is set to java, a scriptlet is transformed into a Java programming language statement fragment and is inserted into the service method of the JSP page’s servlet. A programming language variable created within a scriptlet is accessible from anywhere within the JSP page.

In the web service version of the hello1 application, greeting.jsp contains a scriptlet to retrieve the request parameter named username and test whether it is empty. If the if statement evaluates to true, the response page is included. Because the if statement opens a block, the HTML markup would be followed by a scriptlet that closes the block.

<%

String username = request.getParameter("username");

if ( username != null && username.length() > 0 ) {

%>

<%@include file="response.jsp" %>

<%

}

%>

By itself,a Scriptlet dosen't contribute any HTML(though it can,as we will see down below.)
A scriptlet contains Java code that is executed every time the JSP i invoked.
Here a modified version of our JSP from previous section,adding in a scriptlet.


                                                           
                    
        <%  
        // this is a scriptlet
        System.out,println("getting system date now")
        java.util.Data date=new java.util.Date();                                              
         %>Hello the current time is now<%date %>

References : oracle

« Privious Post » « Next Post » share on :        :  

Love to hear your Views / Guidance / Recommendations on this Post…

Explore the Technology World

Computer Programming Terminologies Computer Programming Terminology is a general word for the group of specialized words or meanings relating to Computer Programming, and also the study of such t ...Read MoreNew features in JDK 12 with IntelliJ IDEADeveloped by JetBrains (formerly known as IntelliJ) ,IntelliJ IDEA is a Java integrated development environment (IDE) for developing computer software. It is av ...Read MoreGoogle Pay API Implementation Demo for AndroidIn this youtube Channel by Android Developers ,Learn how to implement the Google Pay API for Android with just a few lines of code and how it works with your ex ...Read MoreUnit Testing in .NET Core and Azure Devops pipelineUnit testing is a software testing method by which individual units of source code, usage procedures,sets of one or more computer program modules together with ...Read MoreThe mind behind Linux & GIT : Linus TorvaldsLinus Torvalds transformed technology twice — first with the Linux kernel, which helps power the Internet, and again with Git, the source code management ...Read MoreTensorflow and deep learningWith Tensorflow ,deep machine learning transitions from an area of research into mainstream software engineering. ...Read MoreJava program to return all possible permutations from collection of distinct numbersexample of Java program to return all possible permutations from collection of distinct numbers ...Read MoreReal Time Analytics with Spring Application Development FrameworkSpring is the most popular application development framework for enterprise Java.Millions of developers use Spring to build simple, truly portable, fast and fle ...Read MorePath Setting in Java When an application is launched from command prompt Windows OS searches for the executable program in the current working directory. The prompt throws an error ...Read MoreFacebook | whatsapp|Github | Twitter | LinkedIn | Youtube| reddit About | Cookies-Policy | Disclaimer | Site Map | Contact

Call / Visit for New Batch

Services

Why Join Us

  • ➯ Free Demo Classes
  • ➯ No Registration Fee
  • ➯ Interview Questions
  • ➯ Study Materials
  • ➯ Softwares
  • ➯ Aptitude & Reasoning
  • ➯ Placement Assitance

Address

  • MyJava Training Institute ,
  • Plot No.243 , shop No 14 ,
  • Secnd Floor , Zone-II ,
  • M.P.Nagar , Bhopal,
  • Madhya Pradesh ( 462011 )
  • ☎  08871209400 , 7987028543
  • 🌐 www.myjava.in
FacebookGoogle +TwitterYouTube

MyJava - java Training Institute