java lz4压缩工具类

package com.beini.test.javase.compress;import net.jpountz.lz4.*;import java.io.*;import java.nio.ByteBuffer;import java.nio.channels.FileChannel;/** * Created by beini on 2017/10/30. * lz4:https://github.com/lz4/lz4-java */public class Lz4Util {    /**     * @param srcByte 原始数据     * @return 压缩后的数据     */    public static byte[] compressedByte(byte[] srcByte) {        LZ4Factory factory = LZ4Factory.fastestInstance();        LZ4Compressor compressor = factory.fastCompressor();        return compressor.compress(srcByte);    }    /**     * @param compressorByte 压缩后的数据     * @param srcLength      压缩前的数据长度     * @return     */    public static byte[] decompressorByte(byte[] compressorByte, int srcLength) {        LZ4Factory factory = LZ4Factory.fastestInstance();        LZ4FastDecompressor decompressor = factory.fastDecompressor();        return decompressor.decompress(compressorByte, srcLength);    }    /**     * @param srcByte     * @param blockSize 一次压缩的大小 取值范围 64 字节-32M之间     * @return     * @throws IOException     */    public static byte[] lz4Compress(byte[] srcByte, int blockSize) throws IOException {        LZ4Factory factory = LZ4Factory.fastestInstance();        ByteArrayOutputStream byteOutput = new ByteArrayOutputStream();        LZ4Compressor compressor = factory.fastCompressor();        LZ4BlockOutputStream compressedOutput = new LZ4BlockOutputStream(byteOutput, blockSize, compressor);        compressedOutput.write(srcByte);        compressedOutput.close();        return byteOutput.toByteArray();    }    /**     * @param compressorByte     * @param blockSize      一次压缩的大小 取值范围 64 字节-32M之间     * @return     * @throws IOException     */    public static byte[] lz4Decompress(byte[] compressorByte, int blockSize) throws IOException {        LZ4Factory factory = LZ4Factory.fastestInstance();        ByteArrayOutputStream baos = new ByteArrayOutputStream(blockSize);        LZ4FastDecompressor decompresser = factory.fastDecompressor();        LZ4BlockInputStream lzis = new LZ4BlockInputStream(new ByteArrayInputStream(compressorByte), decompresser);        int count;        byte[] buffer = new byte[blockSize];        while ((count = lzis.read(buffer)) != -1) {            baos.write(buffer, 0, count);        }        lzis.close();        return baos.toByteArray();    }    /**     * File  to byte[]     *     * @param filePath     * @return     * @throws IOException     */    public static byte[] returnFileByte(String filePath) throws IOException {        FileInputStream fileInputStream = new FileInputStream(new File(filePath));        FileChannel channel = fileInputStream.getChannel();        ByteBuffer byteBuffer = ByteBuffer.allocate((int) channel.size());        channel.read(byteBuffer);        return byteBuffer.array();    }    /**     * createFile     *     * @param fileByte     * @param filePath     */    public static void createFile(byte[] fileByte, String filePath) {        BufferedOutputStream bufferedOutputStream;        FileOutputStream fileOutputStream;        File file = new File(filePath);        try {            fileOutputStream = new FileOutputStream(file);            bufferedOutputStream = new BufferedOutputStream(fileOutputStream);            bufferedOutputStream.write(fileByte);            fileOutputStream.close();            bufferedOutputStream.close();        } catch (IOException e) {            e.printStackTrace();        }    }}