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JSP pageContext implicit object


JSP pageContext object is an instance of javax.servlet.jsp.PageContext. This object is used to manipulate page, request, application and session attributes.

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

home.jsp

<html>
	<head>
		<title>home</title>
	</head>
	<body> 
	<h3>This is user home page.</h3>
	<%
	String userName = (String)pageContext.getAttribute("userName",
                                               PageContext.SESSION_SCOPE);
	out.print("Logged in user: " + userName);
	%>
	</body>
</html>

web.xml

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

Output:

jsp example 24 login
 
Enter UserName: jai
jsp example 24 value
 
Click on login button.
jsp example 24 display
 
Download this example.
 
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Previous Topic: JSP session implicit object with example.

Related Topics:

JSP implicit objects with example.
JSP out implicit object with example.
JSP request implicit Object with example.
JSP response implicit object with example.
JSP config implicit object with example.
JSP application implicit object with example.
JSP session implicit object with example.
JSP pageContext implicit object with example.
JSP page implicit object with example.
JSP exception implicit object with example.

 

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