What is JSP scripting?
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 %>
What are various scripting elements of JSP?
There are three main subdivisions of scripting elements in JSP.
- Expression Tags.
- Scriptlet Tags.
- Declaration Tags.
What is the syntax of JSP?
JSP Actions
| S.No. | Syntax & Purpose |
|---|---|
| 1 | jsp:include Includes a file at the time the page is requested. |
| 2 | jsp:useBean Finds or instantiates a JavaBean. |
| 3 | jsp:setProperty Sets the property of a JavaBean. |
| 4 | jsp:getProperty Inserts the property of a JavaBean into the output. |
What are JSP directives and how are they different from the scripting elements?
The JSP engine will process any code you write within the pair of the <% and %> tags, and any other texts within the JSP page will be treated as HTML code or plain text while translating the JSP page. Here are five different scripting elements: Comment <%– Set of comment statements –%> Directive <%@ directive %>
Why do we use JSP?
Advantages of using JSP
- It does not require advanced knowledge of JAVA.
- It is capable of handling exceptions.
- Easy to use and learn.
- It can tags which are easy to use and understand.
- Implicit objects are there which reduces the length of code.
- It is suitable for both JAVA and non JAVA programmer.
What are the main 3 components of JSP pages?
There are three types of JSP elements you can use: directive, action, and scripting.
How many JSP tags are there?
There are 12 types of Standard Action Tags in JSP.
Why is JSP used?
It is used to create dynamic web content. In this JSP tags are used to insert JAVA code into HTML pages. It is an advanced version of Servlet Technology. It is a Web based technology helps us to create dynamic and platform independent web pages.
Can we write Java code in JSP?
In JSP, java code can be written inside the jsp page using the scriptlet tag.
Is JSP is a framework?
Servlets and JSPs
The Servlet and JSP are incredibly simple ways to handle an incoming request, and to develop HTML that gets displayed inside a client’s web browser, respectively. All the existing Java-based web frameworks simply build on top of the Servlet and JSP API.
Is JSP still used?
JSP is really a little bit outdated. And there are some inconveniences in it. For example, JSP is a real headache for web designers. Designers cannot just open a JSP file, make some changes, and check the result in the browser, because the JSP file contains tags that are invalid for HTML.
What are the uses of JSP?
JSP has access to entire API of JAVA .
…
- It stands for Java Server Pages.
- It is a server side technology.
- It is used for creating web application.
- It is used to create dynamic web content.
- In this JSP tags are used to insert JAVA code into HTML pages.
- It is an advanced version of Servlet Technology.
What is ID in JSP?
The id attribute uniquely identifies the Action element, and allows the action to be referenced inside the JSP page. If the Action creates an instance of an object, the id value can be used to reference it through the implicit object PageContext.
What language is JSP?
Java programming language
Released in 1999 by Sun Microsystems, JSP is similar to PHP and ASP, but uses the Java programming language.
Can we use JSP in HTML?
No. JSP pages are executed on the server side and produce HTML, which is sent to the browser. JSP acts just like PHP in this regard, essentially “rendering” some HTML code and sending it off to the user. You can’t embed JSP code in the HTML and send it off to the user – their browser will just do nothing with it.
Can we write HTML code inside JSP?
JSP, like ASP, provides a simplified and fast mean to generate dynamic web contents. It allows you to mix static HTML with dynamically generated HTML – in the way that the business logic and the presentation are well separated.
Why JSP is used instead of HTML?
JSP is a technology which is used to create dynamic web applications. HTML is a standard markup language which is used to create the structure of web pages. JSP allow to place the custom tag or third party tag. It does not allow to place the custom tag or third party tag.
Is JSP front end or backend?
If you are looking for a solution in which you can separate the two parts, look no further. JavaServer Pages (JSP) are here. JSP pages allow you to separate front-end presentation from business logic (middle and back-end tiers).
What are advantages of JSP?
The advantages of JSP are twofold. First, the dynamic part is written in Java, not Visual Basic or other MS specific language, so it is more powerful and easier to use. Second, it is portable to other operating systems and non-Microsoft Web servers.
What is bean in JSP?
A JavaBean is a specially constructed Java class written in the Java and coded according to the JavaBeans API specifications. Following are the unique characteristics that distinguish a JavaBean from other Java classes − It provides a default, no-argument constructor.
What is property in JSP?
The setProperty and getProperty action tags are used for developing web application with Java Bean. In web devlopment, bean class is mostly used because it is a reusable software component that represents data. The jsp:setProperty action tag sets a property value or values in a bean using the setter method.
Is JSP or HTML better?
JSP provides a dynamic interface for the continuously changing data and also it dynamically invokes the server actions. HTML provides a means to give a detailed account of the structure of text-based information in a document. JSP generated dynamic web pages only. Whereas Html generated static web pages only.
Is JSP used anymore?
JSP is still used but companies using it are scarce because it’s outdated and is used in the legacy projects only. Most people are now a days using web frameworks like struts, JSF etc. to develop web applications.
What is life cycle of JSP?
The Lifecycle of a JSP Page
Classloading (the classloader loads class file) Instantiation (Object of the Generated Servlet is created). Initialization ( the container invokes jspInit() method). Request processing ( the container invokes _jspService() method). Destroy ( the container invokes jspDestroy() method).
What is POJO class?
POJO classes
POJO stands for Plain Old Java Object. It is an ordinary Java object, not bound by any special restriction other than those forced by the Java Language Specification and not requiring any classpath. POJOs are used for increasing the readability and re-usability of a program.