Implicit objects
Introduction#
Java objects which are created by web container.There are 9 implicit objects
| object | Type |
|---|---|
| out | JspWriter |
| request | HttpServletRequest |
| response | HttpServletResponse |
| config | ServletConfig |
| application | ServletContext |
| session | HttpSession |
| pageContext | PageContext |
| page | Object |
| exception | Throwable |
JSP out implicit object - simply displaying date and time.
<html>
<body>
<% out.print("Today is:"+java.util.Calendar.getInstance().getTime()); %>
</body>
</html>request object in JSP
used to get request information such as parameter, header information, remote address, server name, server port, content type, character encoding.
Index.html
<form action="req.jsp">
<input type="text" name="username">
<input type="submit" value="go"><br/>
</form>req.jsp
<%
String name=request.getParameter("username");
out.print("welcome "+name);
%>