<sql:setDataSource
  driver="com.mysql.jdbc.Driver"
  url="jdbc:mysql:///info330?user=jdbc&password=javasucks"
  scope="session"
/>
<%-- Then, verify it's a good netid in the DB --%>
<sql:query var="count">
  SELECT COUNT(netid) FROM player WHERE netid='${player.netid}'
</sql:query>

<%-- If there is no player with that netid, go back to login --%>
<c:if test="${count.rowsByIndex[0][0] == 0}">
  <c:redirect url="login.jsp" />
</c:if>