Java tutorial
/* * This file is part of AceQL. * AceQL: Remote JDBC access over HTTP. * Copyright (C) 2015, KawanSoft SAS * (http://www.kawansoft.com). All rights reserved. * * AceQL is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * AceQL is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301 USA * * Any modifications to this file must keep this entire header * intact. */ package org.kawanfw.sql.json; import java.util.List; import java.util.Vector; import java.util.logging.Level; import org.json.simple.JSONArray; import org.json.simple.JSONValue; import org.kawanfw.commons.util.ClientLogger; import org.kawanfw.commons.util.FrameworkDebug; /** * @author Nicolas de Pomereu Class to transport int arrays between PC and Host * with JSON */ public class IntArrayTransport { /** For debug info */ private static boolean DEBUG = FrameworkDebug.isSet(IntArrayTransport.class); /** * Format to JSON a int array * * @param intArray * the in array to format * @return the JSON string */ public static String toJson(int[] intArray) { if (intArray == null) { throw new IllegalArgumentException("batchResults is null!"); } List<Integer> list = new Vector<Integer>(); for (int i = 0; i < intArray.length; i++) { list.add(intArray[i]); } // NO! // List list = Arrays.asList(intArray); String jsonString = JSONValue.toJSONString(list); debug(jsonString); return jsonString; } /** * Format from JSON an int array * * @param jsonString * the inat array in JSON format * @return the int array */ public static int[] fromJson(String jsonString) { if (jsonString == null) { throw new IllegalArgumentException("jsonString is null!"); } debug(jsonString); Object JSONArray = JSONValue.parse(jsonString); JSONArray jsonArray = (JSONArray) JSONArray; int[] intArray = new int[jsonArray.size()]; for (int i = 0; i < jsonArray.size(); i++) { long myLong = (Long) jsonArray.get(i); intArray[i] = (int) myLong; } // free JSONArray jsonArray = null; return intArray; } /** * @param args */ public static void main(String[] args) throws Exception { int[] myArray = { 1, 3, 5, 7, 9 }; String s = IntArrayTransport.toJson(myArray); System.out.println(s); int[] backArray = IntArrayTransport.fromJson(s); int cpt = 0; System.out.print("["); for (int i : backArray) { System.out.print(i); if (cpt++ < backArray.length - 1) System.out.print(","); } System.out.println("]"); } private static void debug(String s) { if (DEBUG) { ClientLogger.getLogger().log(Level.WARNING, s); } } }