Example usage for java.util.zip Deflater setInput

Introduction

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

Prototype

public void setInput(byte[] input, int off, int len) 

Source Link

Document

Sets input data for compression.

Usage

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);

    while (!def.needsInput()) {
        int numCompressedBytes = def.deflate(output, 0, output.length);
        if (numCompressedBytes > 0) {
            fout.write(output, 0, numCompressedBytes);
        }// w w w  .  j ava2s  . c o m
    }
    def.finish();
    fin.close();
    fout.flush();
    fout.close();
    def.reset();
}

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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();/*from www. j  ava 2s . co  m*/

    ByteArrayOutputStream bos = new ByteArrayOutputStream(length);

    int count;
    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;
}

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From source file:v7db.files.Compression.java

/**
 * @return 0, if the "deflated" data fills the whole output array
 *//*  w  w w  .  jav  a2s . co  m*/
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;
}

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