What is pageContext setAttribute in JSP?

In JSP, pageContext is an implicit object of type PageContext class. The pageContext object can be used to set,get or remove attribute from one of the following scopes: page. request. session.

What is request setAttribute in JSP?

To pass the value from servlet to html/jsp files, setAttribute() method is called by the request object. setAttribute() method takes an input as an object which sends the data from servlet to the requesting website. Attention reader!

What is pageContext getAttribute?

pageContext getAttribute(String) is for page scope There are TWO overloaded getAttribute() methods you can call on pageContext: a one-arg that takes a String, and a two-arg that takes a String and an int. The one-arg version works just like all the others—it’s for attributes bound TO the pageContext object.

What is pageContext JSP?

PageContext extends JspContext to provide useful context information for when JSP technology is used in a Servlet environment. A PageContext instance provides access to all the namespaces associated with a JSP page, provides access to several page attributes, as well as a layer above the implementation details.

What is ${ PageContext request contextPath?

${pageContext. request. contextPath} is an EL expression equivalent to the JSP expression <\%= request. getContextPath() \%> . It is recommended to use ${pageContext.

How do I request a setAttribute?

7 Answers

1. Have a hidden input in your form, such as ” /> . This will then be available in the servlet as a request parameter.
2. Put it in the session (see request. getSession() – in a JSP this is available as simply session )

What is doPost and doGet method in servlet?

The doGet() method is used for getting the information from server while the doPost() method is used for sending information to the server.

What are the 4 possible scopes of a JSP object?

Object scope in JSP is segregated into four parts and they are page, request, session and application.

How many types of scopes are available in JSP?

Type of Scopes in JSP: JSP provides 4 scopes to a variable. Developer can assign any one of them to a variable. 1. Page Scope.

What is the use of PageContext request contextPath in JSP?

The primary purpose of this expression would be to keep your links ‘relative’ to the application context and insulate them from changes to the application path. For example, if your JSP (named thisJSP. jsp ) is accessed at http://myhost.com/myWebApp/thisJSP.jsp , thecontext path will be myWebApp .

What is request getContextPath in JSP?

JSP Request . get Context Path ( ), the context path is the portion of the request URL that indicates the context of the request. JSP Request .

Is it possible to use request setattribute on a JSP page?

Is it possible to use request.setAttribute on a JSP page and then on HTML Submit get the same request attribute in the Servlet? No. Unfortunately the Request object is only available until the page finishes loading – once it’s complete, you’ll lose all values in it unless they’ve been stored somewhere.

What is the difference between requestrequest attribute and session attribute?

Request attribute is only available in the request object lifetime. filters, servlet, jsp, include, forward uses same request object. Once the request is completed, request object is destroyed. Whereas session attributes are available till the session ends or till the browser is closed. Hence the difference lies in the scope.

What is a servletcontext attribute?

A ServletContext attribute is an object bound into a context through the ServletContext.setAttribute () method and which is available to ALL Servlets (thus JSP) in that context, or to other contexts via the getContext () method. By definition a context attribute exists locally in the VM where they were defined.

What is the difference between contextcontext and session attributes?

Context attributes are meant for infra-structure, such as shared connection pools. Session attributes are meant for contextual information, such as user identification. Request attributes are meant for specific request info, such as query results.