What is PageContext JSP?

What is PageContext JSP?

The pageContext object is used to represent the entire JSP page. This object stores references to the request and response objects for each request. The application, config, session, and out objects are derived by accessing attributes of this object.

What is the difference between ServletContext and PageContext?

ServletContext: Gives the information about the container and it represents an application. PageContext: Gives the information about the Request and it can provide all other implicit JSP objects .

What are the different scopes in JSP?

Object scope in JSP is segregated into four parts and they are page, request, session and application. ‘page’ scope means, the JSP object can be accessed only from within the same page where it was created.

What is the default scope in JSP?

page

What is jsp life cycle?

A JSP life cycle is defined as the process from its creation till the destruction. This is similar to a servlet life cycle with an additional step which is required to compile a JSP into servlet.

What is Requestscope in jsp?

scope=”request” : The object is accessible from any JSP page servicing the same HTTP request that is serviced by the JSP page that created the object. A request-scope object is stored in the implicit request object. The request scope ends at the conclusion of the HTTP request.

What is JSP param?

<jsp:param> tag is used to pass the name and values to the targeted file. These parameters will be retrieved by the targeted file by using request. getParameter() method. In this way one can pass and retrieve the parameters.

Which is the biggest scope provided by JSP?

Application scope

Which of the following is not a scope in JSP?

24. E Global is not a valid scope for java bean in Jsp.

What is a JSP page translated into?

A JSP page services requests as a servlet. If it is, it translates the JSP page into a servlet class and compiles the class. During development, one of the advantages of JSP pages over servlets is that the build process is performed automatically.

How can I get getAttribute in JSP?

1. First create data at the server side and pass it to a JSP. Here a list of student objects in a servlet will be created and pass it to a JSP using setAttribute().
2. Next, the JSP will retrieve the sent data using getAttribute().
3. Finally, the JSP will display the data retrieved, in a tabular form.

What is ServletResponse?

Defines an object to assist a servlet in sending a response to the client. The servlet container creates a ServletResponse object and passes it as an argument to the servlet’s service method. To send binary data in a MIME body response, use the ServletOutputStream returned by getOutputStream() .

What is HttpServletRequest and HttpServletResponse?

protected void service(HttpServletRequest req, HttpServletResponse res) receives the request from the service method, and dispatches the request to the doXXX() method depending on the incoming http request type. protected void doGet(HttpServletRequest req, HttpServletResponse res) handles the GET request.

What is the use of HttpServletRequestWrapper?

Class HttpServletRequestWrapper. Provides a convenient implementation of the HttpServletRequest interface that can be subclassed by developers wishing to adapt the request to a Servlet. This class implements the Wrapper or Decorator pattern.

What is the use of RequestDispatcher?

The servlet container creates the RequestDispatcher object, which is used as a wrapper around a server resource located at a particular path or given by a particular name. This interface is intended to wrap servlets, but a servlet container can create RequestDispatcher objects to wrap any type of resource.

How the request getRequestDispatcher () will be created?

The getRequestDispatcher() method of the Servlet Request interface returns the object of the Request Dispatcher. RequestDispatcher rs = request. After creating the RequestDispatcher object, developers will call the forward() or include() method as per the application’s requirement.

What is RequestDispatcher in Java?

public interface RequestDispatcher. Defines an object that receives requests from the client and sends them to any resource (such as a servlet, HTML file, or JSP file) on the server.