Java Compression Technology

Package zip;

Import Java.io.ByteArrayOutputStream;
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.OutputStream;
Import Java.util.zip.Deflater;
Import Java.util.zip.DeflaterOutputStream;
Import Java.util.zip.Inflater;
Import Java.util.zip.InflaterInputStream;

public class Test {


public static void Main (string[] args) {

String inStr = "@UEsDBBQACAgIAFZ2dUkAAAAAAAAAAAAAAAABAAAAMO1dXXPTxhr +k7npcjvasneaghu7fbwk05io"
+ "MZAQBJKJBDL2/IXTJISRLIGSHBKSC06MFEHPOQPLAMMCM6UQIIQFU8T2RVGLXWKL7BTKLNIJNEJX"
+ "Owpw7vvsh1abxt3p+64t5auruwzxwljuthfyxx6sp5codsxzaigrzqe+phth/knu3knfeavelgsa"
+ "Kbhji5kzejndkid50wzwmceiog0ssynqt0udjtgoeqexpvqh311uivsiqco50ddpzspnl6yankfu"
+ "Eiqqyt3dskz/dunsuym2q41k0mmfztscxavaq6hwhiaucp7isor+kswkzayjjzumz5qi/vskjbu4"
+ "KVIY2KBLOPG07TZOKSXYWGDOLMSMDZM6YK00RZQ1WJ1IFMZT5NQWEQEXPWZ+H6IQS2F6T3ZZNS1G"
+ "Zaxtmzizspkbo+w1zqntxls6mjogqwofexl2qjtai5sizzngcmtqy81rzxlqwp/xc5eykxwj5yh8"
+ "5ghmyrycs5voy8xqyoyj3itnm6ymmgwysqmmdlvoq2jp1ty4bgzcqgqnmmvurytzrzbtrisrtgya"
+ "kxgkx06et3hjb4umhlstsgk9r9j4zjxdfijbwdygcunaqsrmiw2riubcnlssr5eeyzoznqcjab9k"
+ "IG9USZNWYXLXH8DLSTRSYMMOLIBNIRWFT7XFX9YNJ+TPNTUWXJDEVXUKPP2CGDKYEL6FW2R8FKNF"
+ "VL9/+R7+4L7T7UV1U6+I+V/MAEQFNV20OQPF/L6XVKLFNKWT1B68OK2ZARW7T2GFTADRHHAGPVLD"
+ "tt+uv1+i5t+tptimj0+ru/r8i0+r09w3t/ufbjzu/wfv+ppn+m8p9fk7tam2gtq6pvejvvxw/d5n"
+ "2sf6z4+r79/ufl2nf6bp/wtcgo90xhn5pjvk6bp6/rsbb1wfn2lm/b/6yzy1aiz96xwwpo+c3otz"
+ "63P94RMTSJUIT0WHOI/9PC8+098SU4VR9EJK49GTXUS/BMSDDVU0I+RKHX32FU2CPMLFXHOE+1D9"
+ "4RFZMCZOU/DOXWZND+5U1P89WYRSNTCF//ZX5PUU66G/W6B9RZ/9SFBYUEPJFGPTP/RQPP77BXPN"
+ "Dhromzqe7/jjwrl+8mv1zzi+29ryn7xf59uph41h3l9bo66+v8pk6i9e0oqg7rq++311zbq68ry2"
+ "Oevnpzy3r996zz7fnxpn1zvf2mb1zbb6bkr/58p6/a/0zpwftizzgzzc+foycaxzym061py4dhio"
+ "Kaff83yfeulzsdode5hijpuv9cvaeswxloq2so69deqxhwsfwpnwmyq0meryx0dpmcc6dqzjfhni"
+ "G+QGGK6R48GQQGZKOKIKIAQQHNAA2I/SSAFOEICAGGGASQMTPQAYLNQZBKHAQOBIMYQKKAXARSHP"
+ "giwajetkwcklobw5c5acqplcbecbuhcqakckwm0xhqms/z2heibnsi55ttfzzymspgeoz3ogzm8z"
+ "Kj1nsmizygitirpu5zlb3kvo9a6wkpceuzyqzzilror056odtijahance4frnpvjrjz7+w3svmpz"
+ "ZLHSEIDUGYXM5FAEQ0QCQ0KXLOSQ5OI0DQVCUIPDWY5OMENPF5TMUMYFZTG0IGTVPRGOZEUKY5GC"
+ "Ioq4kherpeck8oevul3ouruih67akle4vqttjw4vq3uz2yuuliocgpxbd94ot4+5qtc8mjq6qrxd"
+ "QEXGYQGDCKQXKM5XYGP50DXQSMSAOKHJJY3RQDY5LSXA7QOMZSHAGVALUVY6BCHLCTH8HI4JFB6J"
+ "gwiprsazqrt0qmh0bngzvxpi9mlw9i58jo6pdwtmpxcedoodadil3qfjay3ttehxbmleqj/9fj0h"
+ "W0kip5qdrcsqbgwcbifpda+sqdg+h2iclqqqcrwvhb9kqmpnrpzp49ggzsimw0rntgiaemvm/auz"
+ "0hgad2rzeojyycq7gdvfvdzo/32l3/jiudnj/bzp38ddn1uevvjh0t2ob+q9fipvxd3eoroendbg"
+ "Exrkvyiufimtlq8+pzucqgm3c45bkxti9rvcjtlqkyegnkfhor7d/pg5mk/w/fzuf9sczbeyd0d8"
+ "Xdudak+4dgdnfvcoylriutkhvwud256qig8ocfvxnqc6clyjoktccchxbqbsvt4opkxccchzxruc"
+ "actvh9nwf3dvawl69xyg3ma7eanvs0+irft3/072b4fuucogkaa5i6aqc0daiszeqcgwu128n68f"
+ "SIUH7SSND2XY09OVEBAUD4K2FR6FK2P7+HA/QJ4UGM472DO9PJ6UDGRFHSIT0PKTFCZFJM+0SS2H"
+ "R4SLUSOFTYRJ8B08CIOYCGUQYICUQSYNMGHLEMQGXCWQYQCATXDKOOZKENYLM1NBSIYOGIDSTAAC"
+ "LZQWQLCSQIAGGGLISOZYAMM+NF/1VD9RB/EDILF2AZAGFYB9L8RNIJ9FHY8JZ6+QSGFTXMDOBODM"
+ "Udjzbofmd5lz5sgs+vtnjfla/tq/6otp30rzq7kvfxlchvw5//tffo5/gg1w/anikjr+aba7+nuc"
+ "L6CNZBCMU+S+1ZVZFE1UFWMT8EEL48FBBABG4E2D8HGPWHHAGOIBYKFTL6BKPXRU3ACF5C9X6JD9"
+ "Agtx53mrqrcocke4qvbywu6ep3bqqidh2noxs2fytacyqmuvxguvhgdbhpyw2qloapgomgdqrtge"
+ "kgklu0dljrdmqiszvijoqjhqmr24eulfhiqpqwkkhwlcg1wolykslfbglyohq3blcffglznr7o2m"
+ "b6s6aolcswk7z37cja33k8yi+99miqu9maerztmqlwerjmmb+0lmtx4hjrbfcoyo/p7jcwgwx26f"
+ "Nje5+xnvrs+tdw3keswywazlmke/k2vm94a7moecdepvontxcjedswqsllake/dnj5ijvzwrt7ha"
+ "kvlantvvjxnve6mfcxtzhqsucyylfdmgc2ywpypnqjph5ynpm9rsoqvgiqmkeegg7hxcovourf7g"
+ "5b9rkt60i0yn7aeykd2wzrmjbsgbwsobmocmysbts3c2btyel3sq4wuycav4bghaldjzgwg35rgs"
+ "Eslmjdla/qq4ttxedsmg8a9xccorlhxadmvls0oqin+ic/8qf+7fadq/2+yr8pupcbgedtuvxijn"
+ "Kvbiifmx+r752stymi2zgmxzj0huknu6zbk7yp4s21bbvmjti+wzt85eiez7radq7ukvq2drsyit"
+ "yyxvbrw52sxrmdvt1uzwou0wg7xtwdvulxc4s1rbktzq2r0narfponx4xdhsznpgngh0dp2n777l"
+ "Vfu/v/ro8yuqwq0dxlukavb64vkm+eftbmsbiqco/fclxgbz+ou6kopizvyl7yjvxom/w+f0nnbo"
+ "ZAXA8XIGKHOP2AXF8RQLEYBRGCSELSSQ1WB7HT0J7ZN4/GORAANCCTJBJ6W8PYUOQVBTDBKMAQSV"
+ "TJQQHACQUVLZAZRUQZWTLFQHMIYUVG2TVHGYGDVU2E4ME0GPUCDTSKHIFTIZQMLJZGDHK8NEJ5PB"
+ "y8ktyao/bnffnzjsdu8mh/gjciez7zz5cqczdddjzg8yiyetzsqy2gnxmpklxcfb+gfcg9zpqi3w";
System.err.println ("byte compression/decompression test");
System.err.println ("input string: \ t" + inStr);
byte[] input = Instr.getbytes ();
SYSTEM.ERR.PRINTLN ("input byte length: \ t" + input.length);

byte[] data = compress (input);
System.err.println ("Byte length after compression: \ t" + data.length);

byte[] Output = decompress (data);
SYSTEM.ERR.PRINTLN ("uncompressed byte length: \ t" + output.length);
String outputstr = new string (output);
System.err.println ("output string: \ t" + outputstr);


}

/**
* Compression
*
* @param data
* Data to be compressed
* @return byte[] Compressed data
*/
public static byte[] Compress (byte[] data) {
byte[] output = new byte[0];

Deflater Compresser = new Deflater ();

Compresser.reset ();
Compresser.setinput (data);
Compresser.finish ();
Bytearrayoutputstream BOS = new Bytearrayoutputstream (data.length);
try {
byte[] buf = new byte[1024];
while (!compresser.finished ()) {
int i = compresser.deflate (BUF);
Bos.write (buf, 0, I);
}
Output = Bos.tobytearray ();
} catch (Exception e) {
output = data;
E.printstacktrace ();
} finally {
try {
Bos.close ();
} catch (IOException e) {
E.printstacktrace ();
}
}
Compresser.end ();
return output;
}

/**
* Compression
*
* @param data
* Data to be compressed
*
* @param os
* Output stream
*/
public static void Compress (byte[] data, OutputStream OS) {
Deflateroutputstream dos = new Deflateroutputstream (OS);

try {
Dos.write (data, 0, data.length);

Dos.finish ();

Dos.flush ();
} catch (IOException e) {
E.printstacktrace ();
}
}

/**
* Unzip
*
* @param data
* Data to be compressed
* @return byte[] decompressed data
*/
public static byte[] Decompress (byte[] data) {
byte[] output = new byte[0];

Inflater decompresser = new Inflater ();
Decompresser.reset ();
Decompresser.setinput (data);

Bytearrayoutputstream o = new Bytearrayoutputstream (data.length);
try {
byte[] buf = new byte[1024];
while (!decompresser.finished ()) {
int i = decompresser.inflate (BUF);
O.write (buf, 0, I);
}
Output = O.tobytearray ();
} catch (Exception e) {
output = data;
E.printstacktrace ();
} finally {
try {
O.close ();
} catch (IOException e) {
E.printstacktrace ();
}
}

Decompresser.end ();
return output;
}

/**
* Unzip
*
* @param is
* Input Stream
* @return byte[] decompressed data
*/
public static byte[] Decompress (InputStream is) {
Inflaterinputstream IIS = new Inflaterinputstream (IS);
Bytearrayoutputstream o = new Bytearrayoutputstream (1024);
try {
int i = 1024;
byte[] buf = new Byte[i];

while ((i = iis.read (buf, 0, i)) > 0) {
O.write (buf, 0, I);
}

} catch (IOException e) {
E.printstacktrace ();
}
return O.tobytearray ();
}
}

Test results:

Java Compression Technology