How can I save temporary a form and show it in JSP Pages

Question

Im learning web programming and Im trying to temporary save this form and show it in another JSP Page, here is My example:

This is like my menu, in "Alta Cliente" its my form.

<a href="altaCliente.jsp">Alta de Cliente</a>
  <br><br>
  <a href="altaCuenta.jsp">Alta de Cuenta</a>
  <br><br>
  <a href="detalleCliente.jsp">Detalles de Cliente</a>
  <br><br>
  <a href="#">Lista de Clientes</a>
  <br><br>
  <a href="detalleCuenta.jsp">Detalles de Cuenta</a>
  <br><br>

In this form I can show it without problems in another JSP Page. But my Main problem is when i go to te menu, and Select "Detalles de Cliente" i dont get the data from the form "Alta Cliente" and everything its Null. How can I temporary save this data and Show it in this page, without using a DataBase.

 <form action="detalleCliente.jsp" method="GET">
        
    <label for="nombre"><b>Nombre</b></label>
    <input type="text" placeholder="Ingresa tu nombre" name="nombre" id="nombre" required>
    <br> <br>
    <label for="apellidos"><b>Apellidos</b></label>
    <input type="text" placeholder="Ingresa tus apellidos" name="apellidos" id="apellidos" required>
 <br> <br>
    <label for="direccion"><b>Direccion</b></label>
    <input type="text" placeholder="Ingresa tu direccion" name="direccion" id="direccion" required>
    <br> <br> 
    <label for="cp"><b>Codigo Postal</b></label>
    <input type="text" placeholder="Ingresa tu Codigo Postal" name="cp" id="cp" required>
     <br> <br>
 <input type="submit" value="Submit"/> 
  </div>
</form>