The implicit objects available in the expression language are as follows:
| Object | Description |
|---|---|
| applicationScope | It maps application-scoped variable names to their values. |
| cookie | It maps a cookie name to a single cookie object. |
| header | It maps HTTP request headers as strings. |
| headerValues | It maps HTTP request headers as an array of strings. |
| initParam | It maps a context initialization parameter name to a single value. |
| pageContext | It provides access to objects of servletContext, session, request, and response. |
| pageScope | It maps page-scoped variable names to their values. |
| param | It maps a request parameter name to a single value. |
| paramValues | It maps a request parameter name to an array of values. |
| requestScope | It maps request-scoped variable names to their values. |
| sessionScope | It maps response-scoped variable names to their values. |
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