Example usage for java.util.zip Deflater deflate

Introduction

In this page you can find the example usage for java.util.zip Deflater deflate.

Prototype

public int deflate(ByteBuffer output) 

Source Link

Document

Compresses the input data and fills specified buffer with compressed data.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception { // main method
    // Encode a String into bytes
    String inputString = "this is a test";
    byte[] input = inputString.getBytes("UTF-8");

    // Compress the bytes
    byte[] output1 = new byte[input.length];
    Deflater compresser = new Deflater();
    compresser.setInput(input);/*www. j a  v  a 2  s  .co  m*/
    compresser.finish();
    int compressedDataLength = compresser.deflate(output1);
    compresser.end();

    String str = new String(Base64.getEncoder().encode(output1));
    System.out.println("Deflated String:" + str);

    byte[] output2 = Base64.getDecoder().decode(str);

    // Decompress the bytes
    Inflater decompresser = new Inflater();
    decompresser.setInput(output2);
    byte[] result = str.getBytes();
    int resultLength = decompresser.inflate(result);
    decompresser.end();

    // Decode the bytes into a String
    String outputString = new String(result, 0, resultLength, "UTF-8");
    System.out.println("Deflated String:" + outputString);

}

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From source file:Main.java

License:asdf

public static void main(String[] argv) throws Exception {
    byte[] input = "asdf".getBytes();

    Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_COMPRESSION);

    compressor.setInput(input);/*from   w  w  w.  j  av a  2s.c  o m*/
    compressor.finish();

    ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);

    byte[] buf = new byte[1024];
    while (!compressor.finished()) {
        int count = compressor.deflate(buf);
        bos.write(buf, 0, count);
    }
    bos.close();
    byte[] compressedData = bos.toByteArray();
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    byte[] input = "www.java2s.com".getBytes();

    Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_COMPRESSION);

    compressor.setInput(input);/*from  w ww .j  ava 2 s. c  o m*/
    compressor.finish();

    ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);

    byte[] buf = new byte[1024];
    while (!compressor.finished()) {
        int count = compressor.deflate(buf);
        bos.write(buf, 0, count);
    }
    bos.close();
    byte[] compressedData = bos.toByteArray();
    System.out.println(Arrays.toString(compressedData));

}

---

From source file:Main.java

public static void main(String[] argv) throws Exception {
    byte[] input = "this is a test".getBytes();

    Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_COMPRESSION);

    compressor.setInput(input);//from  w ww. ja  v  a 2 s .  c  o m
    compressor.finish();

    ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);

    byte[] buf = new byte[1024];
    while (!compressor.finished()) {
        int count = compressor.deflate(buf);
        bos.write(buf, 0, count);
    }
    bos.close();

    byte[] compressedData = bos.toByteArray();
    Inflater decompressor = new Inflater();
    decompressor.setInput(compressedData);

    bos = new ByteArrayOutputStream(compressedData.length);

    buf = new byte[1024];
    while (!decompressor.finished()) {
        int count = decompressor.inflate(buf);
        bos.write(buf, 0, count);
    }
    bos.close();

    byte[] decompressedData = bos.toByteArray();
    System.out.println(new String(decompressedData));
}

---

From source file:cz.muni.fi.xklinec.zipstream.App.java

/**
 * Entry point. // w  ww.  j  a v  a2s  . c  o m
 * 
 * @param args
 * @throws FileNotFoundException
 * @throws IOException
 * @throws NoSuchFieldException
 * @throws ClassNotFoundException
 * @throws NoSuchMethodException 
 */
public static void main(String[] args) throws FileNotFoundException, IOException, NoSuchFieldException,
        ClassNotFoundException, NoSuchMethodException, InterruptedException {
    OutputStream fos = null;
    InputStream fis = null;

    if ((args.length != 0 && args.length != 2)) {
        System.err.println(String.format("Usage: app.jar source.apk dest.apk"));
        return;
    } else if (args.length == 2) {
        System.err.println(
                String.format("Will use file [%s] as input file and [%s] as output file", args[0], args[1]));
        fis = new FileInputStream(args[0]);
        fos = new FileOutputStream(args[1]);
    } else if (args.length == 0) {
        System.err.println(String.format("Will use file [STDIN] as input file and [STDOUT] as output file"));
        fis = System.in;
        fos = System.out;
    }

    final Deflater def = new Deflater(9, true);
    ZipArchiveInputStream zip = new ZipArchiveInputStream(fis);

    // List of postponed entries for further "processing".
    List<PostponedEntry> peList = new ArrayList<PostponedEntry>(6);

    // Output stream
    ZipArchiveOutputStream zop = new ZipArchiveOutputStream(fos);
    zop.setLevel(9);

    // Read the archive
    ZipArchiveEntry ze = zip.getNextZipEntry();
    while (ze != null) {

        ZipExtraField[] extra = ze.getExtraFields(true);
        byte[] lextra = ze.getLocalFileDataExtra();
        UnparseableExtraFieldData uextra = ze.getUnparseableExtraFieldData();
        byte[] uextrab = uextra != null ? uextra.getLocalFileDataData() : null;

        // ZipArchiveOutputStream.DEFLATED
        // 

        // Data for entry
        byte[] byteData = Utils.readAll(zip);
        byte[] deflData = new byte[0];
        int infl = byteData.length;
        int defl = 0;

        // If method is deflated, get the raw data (compress again).
        if (ze.getMethod() == ZipArchiveOutputStream.DEFLATED) {
            def.reset();
            def.setInput(byteData);
            def.finish();

            byte[] deflDataTmp = new byte[byteData.length * 2];
            defl = def.deflate(deflDataTmp);

            deflData = new byte[defl];
            System.arraycopy(deflDataTmp, 0, deflData, 0, defl);
        }

        System.err.println(String.format(
                "ZipEntry: meth=%d " + "size=%010d isDir=%5s " + "compressed=%07d extra=%d lextra=%d uextra=%d "
                        + "comment=[%s] " + "dataDesc=%s " + "UTF8=%s " + "infl=%07d defl=%07d " + "name [%s]",
                ze.getMethod(), ze.getSize(), ze.isDirectory(), ze.getCompressedSize(),
                extra != null ? extra.length : -1, lextra != null ? lextra.length : -1,
                uextrab != null ? uextrab.length : -1, ze.getComment(),
                ze.getGeneralPurposeBit().usesDataDescriptor(), ze.getGeneralPurposeBit().usesUTF8ForNames(),
                infl, defl, ze.getName()));

        final String curName = ze.getName();

        // META-INF files should be always on the end of the archive, 
        // thus add postponed files right before them
        if (curName.startsWith("META-INF") && peList.size() > 0) {
            System.err.println(
                    "Now is the time to put things back, but at first, I'll perform some \"facelifting\"...");

            // Simulate som evil being done
            Thread.sleep(5000);

            System.err.println("OK its done, let's do this.");
            for (PostponedEntry pe : peList) {
                System.err.println(
                        "Adding postponed entry at the end of the archive! deflSize=" + pe.deflData.length
                                + "; inflSize=" + pe.byteData.length + "; meth: " + pe.ze.getMethod());

                pe.dump(zop, false);
            }

            peList.clear();
        }

        // Capturing interesting files for us and store for later.
        // If the file is not interesting, send directly to the stream.
        if ("classes.dex".equalsIgnoreCase(curName) || "AndroidManifest.xml".equalsIgnoreCase(curName)) {
            System.err.println("### Interesting file, postpone sending!!!");

            PostponedEntry pe = new PostponedEntry(ze, byteData, deflData);
            peList.add(pe);
        } else {
            // Write ZIP entry to the archive
            zop.putArchiveEntry(ze);
            // Add file data to the stream
            zop.write(byteData, 0, infl);
            zop.closeArchiveEntry();
        }

        ze = zip.getNextZipEntry();
    }

    // Cleaning up stuff
    zip.close();
    fis.close();

    zop.finish();
    zop.close();
    fos.close();

    System.err.println("THE END!");
}

---

From source file:Main.java

public static byte[] compress(byte[] data, int level) throws IOException {
    if (data == null || data.length == 0) {
        return data;
    }//from  w ww.j  ava2s  .  c om
    ByteArrayOutputStream bout = new ByteArrayOutputStream(data.length);
    Deflater deflater = new Deflater();
    deflater.setLevel(level);
    deflater.setInput(data);
    deflater.finish();
    byte[] buf = new byte[BUFFER_SIZE];
    while (!deflater.finished()) {
        int count = deflater.deflate(buf);
        bout.write(buf, 0, count);
    }
    deflater.end();
    bout.close();
    return bout.toByteArray();
}

---

From source file:v7db.files.Compression.java

/**
 * @return 0, if the "deflated" data fills the whole output array
 */// ww w .ja v a  2 s.  com
static int deflate(byte[] data, int off, int len, byte[] out) {
    Deflater deflater = new Deflater(BEST_COMPRESSION, true);
    deflater.setInput(data, off, len);
    deflater.finish();
    int size = deflater.deflate(out);
    if (size == 0 || size == out.length)
        return 0;
    return size;
}

---

From source file:org.samlsnort.util.EncodingTool.java

public static String deflateToBase64(String inflated) {

    Deflater deflater = new Deflater(Deflater.DEFLATED, true);
    deflater.setInput(inflated.getBytes(CHARSET));
    deflater.finish();//w w  w . java2s  .  c o m
    byte[] deflatedBytes = new byte[2048];
    int len = deflater.deflate(deflatedBytes);
    return new String(Base64.encodeBase64(Arrays.copyOf(deflatedBytes, len)), CHARSET);
}

---

From source file:Main.java

public static byte[] compress(byte[] data) throws IOException {
    Deflater deflater = new Deflater();
    deflater.setInput(data);//from   w  w  w .  j  av a 2  s.  c  om

    ByteArrayOutputStream outputStream = new ByteArrayOutputStream(data.length);

    deflater.finish();
    byte[] buffer = new byte[1024];
    while (!deflater.finished()) {
        int count = deflater.deflate(buffer); // returns the generated code... index  
        outputStream.write(buffer, 0, count);
    }
    outputStream.close();
    byte[] output = outputStream.toByteArray();

    System.out.println("Original: " + data.length / 1024 + " Kb");
    System.out.println("Compressed: " + output.length / 1024 + " Kb");
    return output;
}

---

From source file:Main.java

private static byte[] compress(byte[] data) throws IOException {
    Deflater deflater = new Deflater();
    deflater.setInput(data);//from  www .j  av  a 2s  . c  o  m

    ByteArrayOutputStream outputStream = new ByteArrayOutputStream(data.length);

    deflater.finish();
    byte[] buffer = new byte[1024];
    while (!deflater.finished()) {
        int count = deflater.deflate(buffer); // returns the generated code... index  
        outputStream.write(buffer, 0, count);
    }
    outputStream.close();
    byte[] output = outputStream.toByteArray();
    deflater.end();

    // System.out.println("Original: " + data.length + " bytes.");
    // System.out.println("Compressed: " + output.length + " bytes.");
    return output;
}

---

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