Example usage for java.util.zip Deflater finish

Introduction

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

Prototype

boolean finish

To view the source code for java.util.zip Deflater finish.

Click Source Link

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);/*from w  ww . j  a v  a2  s .c  o 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 www .  j  ava  2  s.  co 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  w w .j a  v  a  2 s. c  om
    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  w  w. 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:Main.java

public static void main(String[] args) throws IOException {
    Deflater def = new Deflater();
    byte[] input = new byte[1024];
    byte[] output = new byte[1024];

    FileInputStream fin = new FileInputStream("a.dat");
    FileOutputStream fout = new FileOutputStream("b.dat");

    int numRead = fin.read(input);

    def.setInput(input, 0, numRead);//  w w  w  . j  a v a 2 s .  co m

    while (!def.needsInput()) {
        int numCompressedBytes = def.deflate(output, 0, output.length);
        if (numCompressedBytes > 0) {
            fout.write(output, 0, numCompressedBytes);
        }
    }
    def.finish();
    fin.close();
    fout.flush();
    fout.close();
    def.reset();
}

---

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

/**
 * Entry point. //www  . j ava 2  s . 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[] input, int compressionLevel, boolean GZIPFormat) throws IOException {
    Deflater compressor = new Deflater(compressionLevel, GZIPFormat);

    compressor.setInput(input);/*from   ww w . j av  a  2s.  c  om*/

    compressor.finish();

    ByteArrayOutputStream bao = new ByteArrayOutputStream();
    byte[] readBuffer = new byte[1024];
    int readCount = 0;

    while (!compressor.finished()) {
        readCount = compressor.deflate(readBuffer);
        if (readCount > 0) {
            bao.write(readBuffer, 0, readCount);
        }
    }

    compressor.end();
    return bao.toByteArray();
}

---

From source file:Main.java

public static byte[] compress(byte[] data, int level) throws IOException {
    if (data == null || data.length == 0) {
        return data;
    }//from   ww w  .j av a 2  s .co m
    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:Main.java

public static byte[] compressInZlib(byte[] originalData, int offset, int length) throws IOException {

    Deflater compresser = new Deflater();
    compresser.setInput(originalData, offset, length);
    compresser.finish();

    ByteArrayOutputStream bos = new ByteArrayOutputStream(length);

    int count;/*  w ww  .  j a  v  a  2s. co m*/
    byte[] buf = new byte[1024];
    while (!compresser.finished()) {
        count = compresser.deflate(buf);
        bos.write(buf, 0, count);
    }
    compresser.end();

    byte[] compressData = bos.toByteArray();
    bos.close();

    return compressData;
}

---

From source file:Main.java

public static byte[] zipCompress(byte[] input, int level) {
    Deflater compressor = new Deflater();
    compressor.setLevel(level);// w w  w . j ava 2  s .c o  m
    compressor.setInput(input);
    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);
    }
    try {
        bos.close();
    } catch (IOException e) {
    }
    return bos.toByteArray();
}

---

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