<c:forEach var = "i" begin = "1" end = "5">
    Item <c:out value = "${i}"/><p>
 </c:forEach>

...

<%
   ArrayList<UserModel> users = UserMaker.getUsers();
%>

...

<c:forEach items="${users}" var="user">
   <tr>
      <td>${user.name}</td>
      <td>${user.login}</td>
      <td>${user.group}</td>
      <td>${user.bestResult}</td>
   </tr>
</c:forEach>

...

public class UserModel {

   private String login;
   private String name;
   private String group;
   private String bestResult;

   public UserModel(){
       ...
   }

   ...

   public String getName() {
       return name;
   }

   public String getGroup() {
       return group;
   }

   public String getLogin() {
       return login;
   }

   public String getBestResult() {
       return bestResult;
   }

}

public class Users {

    ...

    public static ArrayList<UserModel> getUsers() throws SQLException {
        ArrayList<UserModel> users = new ArrayList<UserModel>();
        String query = "SELECT * FROM users u LEFT JOIN groups g ON u.id_group = g.id";
        ResultSet result = FirebirdDB.getInstance().execSelect(query);
        while (result.next()){
            UserModel user = new UserModel();
            user.setLogin(result.getString("LOGIN"));
            user.setName(result.getString("FULL_NAME"));
            user.setGroup(result.getString("NAME_GROUP"));
            user.setBestResult(result.getString("COUNT_TRUE_ANSWERS") + "/" + result.getString("COUNT_QUESTIONS"));
            users.add(user);
        }
        return users;
    }

    ...

}