ResultSet rs = stm.executeQuery(request);

JSONArray array = new JSONArray();

​

ResultSetMetaData rsmd = rs.getMetaData();

int columns = rsmd.getColumnCount();

​

while (rs.next()) {

    JSONObject jsonObject = new JSONObject();

    for (int i = 0; i < columns; i++) {

        jsonObject.put(rsmd.getColumnLabel(i + 1), rs.getObject(i + 1));

    }

    array.add(jsonObject);

}