JSP 2.0 Expression Language - Implicit Objects

• pageContext - the PageContext object
• pageScope - a Map that maps page-scoped attribute names to their values
• requestScope - a Map that maps request-scoped attribute names to their values
• sessionScope - a Map that maps session-scoped attribute names to their values
• applicationScope - a Map that maps application-scoped attribute names to their values
• param - a Map that maps parameter names to a single String parameter value
• paramValues - a Map that maps parameter names to a String[] of all values for that parameter
• header - a Map that maps header names to a single String header value
• headerValues - a Map that maps header names to a String[] of all values for that header
• initParam - a Map that maps context initialization parameter names to their String parameter value
• cookie - a Map that maps cookie names to a single Cookie object.

Change Parameter

foo =

EL Expression	Result
\${param.foo}	${fn:escapeXml(param["foo"])}
\${param["foo"]}	${fn:escapeXml(param["foo"])}
\${header["host"]}	${fn:escapeXml(header["host"])}
\${header["accept"]}	${fn:escapeXml(header["accept"])}
\${header["user-agent"]}	${fn:escapeXml(header["user-agent"])}