What is pageContext in Servlet?

PageContext extends JspContext to provide useful context information for when JSP technology is used in a Servlet environment. The PageContext class is an abstract class, designed to be extended to provide implementation dependent implementations thereof, by conformant JSP engine runtime environments.

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.

Is pageContext is an implicit object 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.

What is Pagescope in JSP?

page scope means, it can be thought of as an object that represents the entire JSP page,i.e. the JSP object can be accessed only from within the same page where it was created. The page object is really a direct synonym for the this object.

What is scope in JSP?

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

What is config object in JSP?

In JSP, config is an implicit object of type ServletConfig. This object can be used to get initialization parameter for a particular JSP page. The config object is created by the web container for each jsp page. Generally, it is used to get initialization parameter from the web.

What is request getParameter in JSP?

getParameter(String name) – This method is used to get the value of a request’s parameter. For example at login page user enters user-id and password and once the credentials are verified the login page gets redirected to user information page, then using request.

What is JSP useBean?

The jsp:useBean action tag is used to locate or instantiate a bean class. If bean object of the Bean class is already created, it doesn’t create the bean depending on the scope. But if object of bean is not created, it instantiates the bean.

How do I get the page context of a JSP page?

A PageContext instance is obtained by a JSP implementation class by calling the JspFactory.getPageContext() method, and is released by calling JspFactory.releasePageContext(). An example of how PageContext, JspFactory, and other classes can be used within a JSP Page Implementation object is given elsewhere.

What is a pageContext instance?

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. Implicit objects are added to the pageContext automatically.

What is the difference between serveletcontext and pageContext in JSP?

There are nine implicit objects in JSP, among them one is PageContext. PageContext has four Scopes. It is applicable for entire application. ServeletContext gives information about container, PageContext gives information about request. What platform should I use to build a site together with my team?

What are the credentials saved in the page context?

For each request, the credentials to the response and request objects are saved by this pageContext object. By accessing attributes of the pageContext object, the out, session, config, and application objects are obtained.