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.
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(“amar”)) { 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> |