JsonConverter.java

package org.myLazyClock.calendarApi;/*
 * myLazyClock
 *
 * Copyright (C) 2014
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import com.google.gson.JsonElement;
import com.google.gson.JsonParser;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Map;

/**
 * Created on 30/11/14.
 *
 * @author dralagen
 */
public class JsonConverter {

    private static String  urlSmartEdt = "http://smart-edt.fr/android/data.php";

    public static JsonElement getJson(Map<String, String> params) throws IOException {
        URL url = new URL(urlSmartEdt);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("POST");
        conn.setDoInput(true);
        conn.setDoOutput(true);

        OutputStream os = conn.getOutputStream();
        BufferedWriter writer = new BufferedWriter(
                new OutputStreamWriter(os, "UTF-8"));
        writer.write(getQuery(params));
        writer.flush();
        writer.close();
        os.close();

        conn.connect();

        JsonParser jp = new JsonParser();
        return jp.parse(new InputStreamReader((InputStream) conn.getContent()));
    }

    public static String getQuery(Map<String, String> params) throws UnsupportedEncodingException
    {
        StringBuilder result = new StringBuilder();
        boolean first = true;
        for (Map.Entry<String, String> pair : params.entrySet())
        {
            if (first)
                first = false;
            else
                result.append("&");

            result.append(URLEncoder.encode(pair.getKey(), "UTF-8"));
            result.append("=");
            result.append(URLEncoder.encode(pair.getValue(), "UTF-8"));
        }

        return result.toString();
    }

}