open_in_new content_copy 
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<%
    // Initialize variables to hold form data
    String name = request.getParameter("name");
    String age = request.getParameter("age");
    boolean formSubmitted = (name != null && age != null); // Check if form is submitted
%>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Parameter Input Form</title>
</head>
<body>
    <h2>Enter Your Details</h2>

    <!-- Display the form if no data has been submitted -->
    <% if (!formSubmitted) { %>
        <form action="requestjsp.jsp" method="post">
            Name: <input type="text" name="name" required><br><br>
            Age: <input type="text" name="age" required><br><br>
            <input type="submit" value="Submit">
        </form>
    <% } else { %>
        <!-- Display submitted data if form is submitted -->
        <h2>Your Details:</h2>
        <p>Name: <%= name %></p>
        <p>Age: <%= age %></p>
    <% } %>
</body>
</html>