JSP – Implicit Objects

JSP Implicit Objects are the Java objects .These objects are created by the web container that are available to all the jsp pages JSP Implicit Objects are also know as pre-defined variables.

JSP Implicit Objects  are only  direclty use  in JSP scriptlets tag.it can’t use in JSP Declaration tag.because JSP Declaration tag  code will go outside of  _jspService() method .

There  are 9 implicit objects in jsp . 7 of them are declared as local variable  inside  _jspService() method whereas 2 of them are part of _jspService() method argument

A list of the 9 implicit objects is given below:

1. out Object
2. request Object
3. response Object
4. config Object
5. application Object
6. session Object
7. pageContext Object
8. page Object
9. exception Object

JSP object and their types

Object	Type
request	javax.servlet.http.HttpServletRequest
response	javax.servlet.http.HttpServletResponse
out	javax.servlet.jsp.JspWriter
session	javax.servlet.http.HttpSession
application	javax.servlet.ServletContext
config	javax.servlet.ServletConfig
pageContext	javax.servlet.jsp.PageContext
page	java.lang.Object
Exception	javax.servlet.jsp.JspException.