Java uses gzip for compression and decompression (Gzipoutputstream,gzipinputstream) __java

To use Gzipoutputstream for gzip compression:

public static byte[] Compress (String str, string encoding) {
        if (str = NULL | | str.length () = 0) {return
            null;< c2/>}
        Bytearrayoutputstream out = new Bytearrayoutputstream ();
        Gzipoutputstream gzip;
        try {
            gzip = new Gzipoutputstream (out);
            Gzip.write (str.getbytes (encoding));
            Gzip.close ();
        } catch (IOException e) {
            apilogger.error ("gzip compress error.", e);
        }
        return Out.tobytearray ();
    }

To use Gzipinputstream for gzip decompression:

public static byte[] uncompress (byte[] bytes) {
        if (bytes = NULL | | bytes.length = 0) {return
            null;
        }
        Bytearrayoutputstream out = new Bytearrayoutputstream ();
        Bytearrayinputstream in = new Bytearrayinputstream (bytes);
        try {
            Gzipinputstream ungzip = new Gzipinputstream (in);
            byte[] buffer = new byte[256];
            int n;
            while ((n = ungzip.read (buffer)) >= 0) {
                out.write (buffer, 0, N);
            }
        catch (IOException e) {
            Apilo Gger.error ("gzip uncompress error.", e);
        }

        return Out.tobytearray ();
    }

Complete code:

Package com.weibo.api.proxy.server.util;
Import Java.io.ByteArrayInputStream;
Import Java.io.ByteArrayOutputStream;
Import java.io.IOException;
Import Java.util.zip.GZIPInputStream;

Import Java.util.zip.GZIPOutputStream;

Import Org.apache.commons.codec.binary.StringUtils;

Import Cn.sina.api.commons.util.ApiLogger;

    /** * * * @author WENQI5 * */public class Gziputils {public static final String gzip_encode_utf_8 = "UTF-8";

    public static final String gzip_encode_iso_8859_1 = "Iso-8859-1"; 
        /** * String compressed to gzip byte array * * @param str * @return/public static byte[] Compress (string str) {
    Return compress (str, gzip_encode_utf_8);  /** * String compressed to gzip byte array * * @param str * @param encoding * @return * * public static
        Byte[] Compress (String str, string encoding) {if (str = NULL | | str.length () = 0) {return null; } Bytearrayoutputstream out = new BytearrayoutputStream ();
        Gzipoutputstream gzip;
            try {gzip = new Gzipoutputstream (out);
            Gzip.write (str.getbytes (encoding));
        Gzip.close ();
        catch (IOException e) {apilogger.error ("gzip compress error.", e);
    return Out.tobytearray (); /** * gzip Uncompressed * * @param bytes * @return/public static byte[] Uncompress (byte[) by
        tes {if (bytes = NULL | | | bytes.length = = 0) {return null;
        } Bytearrayoutputstream out = new Bytearrayoutputstream ();
        Bytearrayinputstream in = new Bytearrayinputstream (bytes);
            try {gzipinputstream ungzip = new Gzipinputstream (in);
            byte[] buffer = new BYTE[256];
            int n;
            while ((n = ungzip.read (buffer)) >= 0) {out.write (buffer, 0, N);
The catch (IOException e) {apilogger.error ("gzip uncompress error.", e);        return Out.tobytearray ();
        }/** * * @param bytes * @return/public static String uncompresstostring (byte[] bytes) {
    Return uncompresstostring (bytes, gzip_encode_utf_8); /** * * @param bytes * @param encoding * @return/public static String Uncompressto
        String (byte[] bytes, string encoding) {if (bytes = = NULL | | bytes.length = 0) {return null;
        } Bytearrayoutputstream out = new Bytearrayoutputstream ();
        Bytearrayinputstream in = new Bytearrayinputstream (bytes);
            try {gzipinputstream ungzip = new Gzipinputstream (in);
            byte[] buffer = new BYTE[256];
            int n;
            while ((n = ungzip.read (buffer)) >= 0) {out.write (buffer, 0, N);
        return out.tostring (encoding); catch (IOException e) {apilogger.error ("gzip uncompress to String ErroR. ", E);
    return null; public static void Main (string[] args) {String str = '%5b%7b%22lastupdatetime%22%3
        a%222011-10-28+9%3a39%3a41%22%2c%22smslist%22%3a%5b%7b%22livestate%22%3a%221 ";
        System.out.println ("Original length:" + str.length ());
        System.out.println ("Compressed string:" + gziputils.compress (str). toString (). Length ());
        System.out.println ("Uncompressed string:" + Stringutils.newstringutf8 (gziputils.uncompress (gziputils.compress (str)));
    System.out.println ("Uncompressed string:" + gziputils.uncompresstostring (gziputils.compress (str));
 }
}