JSP Expression Language provides many implicit objects that we can use to get attributes from different scopes and parameter values.
Below table provides list of implicit object in JSP EL.
JSP EL IMPLICIT OBJECTS TYPE DESCRIPTION
pageScope Map A map that contains the attributes set with page scope.
requestScope Map Used to get the attribute value with request scope.
sessionScope Map Used to get the attribute value with session scope.
applicationScope Map Used to get the attributes value from application scope.
param Map Used to get the request parameter value, returns a single value
paramValues Map Used to get the request param values in an array, useful when request parameter contain multiple values.
header Map Used to get request header information.
headerValues Map Used to get header values in an array.
cookie Map Used to get the cookie value in the JSP
initParam Map Used to get the context init params, we can’t use it for servlet init params
pageContext pageContext Same as JSP implicit pageContext object, used to get the request, session references etc. example usage is getting request HTTP Method name.
