a) HTML
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Requisições GET/POST</title>
</head>
<body>
<form action="getPostServlet" method="get">
<input type="submit" value="método GET">
</form>
<br/>
<form action="getPostServlet" method="post">
<input type="submit" value="método POST">
</form>
</body>
</html>
No código HTML devem-se observar dois valores: