JSP response implicit object

JSP response object is an instance of javax.servlet.http.HttpServletResponse. It is mainly used to modify the response.

Example:

login.jsp

<html>
	<head>
		<title>login</title>
	</head>
	<body> 
		<form action="welcome.jsp">
			<input type="text" name="userName" />
			<input type="submit" value="login"/>
		</form>
	</body>
</html>

welcome.jsp

<html>
	<head>
		<title>response implicit object example</title>
	</head>
	<body> 
		<%
			String userName=request.getParameter("userName");
			if(userName.equals("jai")){
				response.sendRedirect("home.jsp");  
			}else{
				out.print("Wrong username.");  
			}
		%>
	</body>
</html>

home.jsp

<html>
	<head>
		<title>home</title>
	</head>
	<body> 
		<h3>This is user's home page.</h3>
	</body>
</html>

web.xml

<web-app>
 
  <welcome-file-list>
          <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>	
 
</web-app>

Output:

jsp example 20 login

Enter Username: jai
jsp example 20 value

Click on login button.
jsp example 20 display

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