25.Session


import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

@WebServlet(urlPatterns = {“/sessiondemo1”})
public class sessiondemo1 extends HttpServlet {

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType(“text/html;charset=UTF-8”);
try (PrintWriter out = response.getWriter()) {
/* TODO output your page here. You may use following sample code. */
HttpSession s=request.getSession(false);
String name=(String) s.getAttribute(“name”);
out.println(“Welcome “+name);
}
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
@Override
public String getServletInfo() {
return “Short description”;
}// </editor-fold>

}
SessionDemo.html
<html>
<head>
<title>TODO supply a title</title>
<meta charset=”UTF-8″>
<meta name=”viewport” content=”width=device-width, initial-scale=1.0″>
</head>
<body>
<form action=”sessiondemo” post=”post”>
Enter your name:<input type=”text” name=”name”>
<input type=”submit” value=”go”>
</form>
</body>
</html>