zstack/utils/src/main/java/org/zstack/utils/Compresser.java at master · zstackio/zstack · GitHub

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package org.zstack.utils;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.util.zip.Deflater;

import java.util.zip.DeflaterOutputStream;

import java.util.zip.Inflater;

import java.util.zip.InflaterInputStream;

public class Compresser {

public static byte[] deflate(byte[] input) throws IOException {

return deflate(input, 8192);

}

public static byte[] deflate(byte[] input, int bufferSize) throws IOException {

ByteArrayOutputStream out = new ByteArrayOutputStream(input.length);

Deflater def = new Deflater();

DeflaterOutputStream dos = new DeflaterOutputStream(out, def, bufferSize);

dos.write(input, 0, input.length);

dos.finish();

dos.close();

byte[] ret = out.toByteArray();

out.close();

return ret;

}

public static byte[] inflate(byte[] input, int bufferSize) throws IOException {

ByteArrayInputStream in = new ByteArrayInputStream(input);

Inflater inf = new Inflater();

InflaterInputStream iis = new InflaterInputStream(in, inf, bufferSize);

ByteArrayOutputStream out = new ByteArrayOutputStream(input.length * 5);

for (int c = iis.read(); c != -1; c = iis.read()) {

out.write(c);

}

in.close();

iis.close();

byte[] ret = out.toByteArray();

out.close();

return ret;

}

public static byte[] inflate(byte[] input) throws IOException {

return inflate(input, 8192);

}

zstack/utils/src/main/java/org/zstack/utils/Compresser.java at master · zstackio/zstack · GitHub

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