This means personnel involved in web page design do not need to understand Java programming language syntax to do their jobs. JSP technology is extensible through the development of custom actions, or tags, which are encapsulated in tag libraries. A Scrollbar is a Component, but not a Container. A ScrollPane is a Container. A ScrollPane handles its own events and performs its own scrolling. A Java package is a naming context for classes and interfaces. A JSP page can change its content based on any number of variable items.
A JSP page not only contains standard markup language elements like a regular web page but also contains special JSP elements that allow the server to insert dynamic content in the page. This combination of standard elements and custom elements allows for the creation of powerful web apps.
Which of the scripting of JSP not putting content into the service method of the converted servlet? The dynamic interception of requests and responses to transform the information is done by which of the following? Before you go! Download PDF. Enter the name of your college. Computer Science. Information Technology. Mathematics and Computing. Before After Enter company name.
Forgot Password. What is JSP? How does JSP work? How does JSP Initialization take place? What is the use of JSP? What are some of the advantages of using JSP?
What is Java Server Template Engines? What are Servlets? Explain the Life Cycle of a servlet. What is the difference between JSP and Javascript? What are JSP Operators? Explain the JSP for loop. Explain the JSP while loop. What do you mean by JavaBeans? What is J2EE? What is JSTL? Which methods are used for reading form data using JSP? What is an Exception Object? How does JSP processing take place?
Explain the anatomy of a JSP page? What are the various action tags used in JSP? What is the JSP Scriptlet? What is a JSP Declaration? Conclusion Crack your next tech interview with confidence!
Take Free Mock Interview. When a container loads a JSP, it invokes the jspInit method before servicing any requests. Click here to download. Variable Name Java Type Description request javax. HttpServletRequest The request object is used to request information like a parameter, header information, server name, etc.
HttpServletResponse The response is an instance of a class that represents the response that can be given to the client pageContext javax. PageContext This is used to get, set, and remove the attributes from a particular scope. HttpSession This is used to get, set, and remove attributes to session scope and also used to get session information.
JspWriter This is an implicit object, used to write the data to the buffer and send output to the client in response. ServletConfig Config is used to get the initialization parameter in web. Object This implicit variable holds the currently executed servlet object for the corresponding JSP.
Throwable Exception which is the implicit object of the throwable class is used for exception handling in JSP. It has Automatic Javabeans Introspection Support. We don't need to downcast the objects, which have been retrieved as scoped attributes.
Easier for humans to read and easier for computers to understand. The following table lists out the important methods available in the Throwable class: 1 public String getMessage Returns a detailed message about the exception that has occurred.
This message is initialized in the Throwable constructor. The element at index 0 represents the top of the call stack, and the last element in the array represents the method at the bottom of the call stack.
Various action tags used in JSP are as follows: jsp:forward: This action tag forwards the request and response to another resource. It is used in forward and includes mostly.
In Scriptlet, a java code is executed every time the JSP is invoked. The custom tags are just user-defined elements that are converted into some operation on an object when the JSP is translated into a servlet.
Custom tags are instantiated from the SimpleTagSupport class. With this, scriptlet tag use is removed. And also, the custom tags can be reused. Thank you. What is responsive web design and why is it important?
How do you create it? The methods provided by this object are, out. Tags are an important part of JSP. It has a number of attributes like buffer, autoFlush, contentType, session, etc to provide information.
Page — The default scope that specifies the scope of the bean within the JSP page. Request — specifies the scope of the bean to all the JSP page that processes the same request. Session — specifies the scope of the bean to all the JSP page that has the same session irrespective of its request. Application — specifies the scope of the bean to all the JSP pages in the same application. Creating Session session. To remove the object from the session. To remove the entire session.
Core tags — this tag provides support for variables, URL management, and control flow by importing core libraries. Function tags — It provides support for string manipulation functions. To create a custom tag in jsp, do the following steps. Create the tag handler class and override the doStartTag method. Create the TLD file which contains information about the tag and the tag handler class.
Create the JSP file and use the created tag in it. Online Training Programs.
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