input Stream String From GZIP - Android File Input Output

Android examples for File Input Output:Zip File

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Description

input Stream String From GZIP

Demo Code

/*******************************************************************************
 * Copyright (c) 2015 btows.com.//from w  ww  .ja va2  s .com
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
//package com.java2s;
import java.io.BufferedInputStream;

import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import java.util.zip.GZIPInputStream;

public class Main {

    public static String inputStream2StringFromGZIP(InputStream is) {
        StringBuilder resultSb = new StringBuilder();
        BufferedInputStream bis = null;
        InputStreamReader reader = null;
        try {
            bis = new BufferedInputStream(is);
            bis.mark(2);
            // ?????????
            byte[] header = new byte[2];
            int result = bis.read(header);
            // reset??????????
            bis.reset();
            // ???????GZIP???
            int headerData = getShort(header);
            // Gzip??????????0x1f8b
            if (result != -1 && headerData == 0x1f8b) {
                is = new GZIPInputStream(bis);
            } else {
                is = bis;
            }
            reader = new InputStreamReader(is, "utf-8");
            char[] data = new char[100];
            int readSize;
            while ((readSize = reader.read(data)) > 0) {
                resultSb.append(data, 0, readSize);
            }
        } catch (Exception e) {
            // Logger.e(TAG, e);
        } finally {
            closeIO(is, bis, reader);
        }
        return resultSb.toString();
    }

    private static int getShort(byte[] data) {
        return (int) ((data[0] << 8) | data[1] & 0xFF);
    }

    public static void closeIO(Closeable... closeables) {
        if (null == closeables || closeables.length <= 0) {
            return;
        }
        for (Closeable cb : closeables) {
            try {
                if (null == cb) {
                    continue;
                }
                cb.close();
            } catch (IOException e) {
            }
        }
    }
}

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