response

The JSP implicit response object contains the output to the client. The JSP implicit response object can be used for following.

  1. To add HTTP headers
  2. To create cookies
  3. To setting content type
  4. To redirect
Name Interface Tomcat Implementation
response javax.servlet.http.HttpServletResponse org.apache.catalina.connector.ResponseFacade

JSP implicit object ‘response’ example program (github)

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>ourownjava.com</title>
</head>
<body>
<!-- jsp implicit object request example -->
Tomcat implementation of jsp implicit object request : <% out.println(response.getClass().getCanonicalName()); %> <br/>
<!-- how to add header entries into response -->
<%response.addHeader("argument1", "argument1Value");%>
<!-- how to add cookie into response -->
<%final Cookie cookie = new Cookie("token", "tokenValue");
response.addCookie(cookie); %>
<!-- how to add an attribute to session -->
<%session.setAttribute("who", "ourownjava.com"); %>
<!-- how to instruct the browser to redirect -->
<% response.sendRedirect("redirected.jsp");%>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>ourownjava.com</title>
</head>
<body>
<% out.println(session.getAttribute("who")); %>
</body>
</html>

How to run the sample program?

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