hoe multiple join sql-query te gebruiken in java spring boot

Probeer deze methode

String query= "SELECT firewall_items.src, firewalls.info 
FROM firewall_items 
JOIN firewalls 
ON firewall_items.firewalls_id = firewalls.id"
List<Item> items = jdbcTemplate.query(
      query, 
      new MapSqlParameterSource(), 
      new FirewallInfoRowMapper()
      );