170814, Java using gzip compressed files, restore files

 Packagecom.rick.utils;ImportJava.io.*;ImportJava.util.zip.GZIPInputStream;ImportJava.util.zip.GZIPOutputStream;/******************************************************** * @Desc: GIZP Tool class * @Author: ZRP * @Date: 2017/11/9 9:31 ****** **************************************************/ Public classGziputil {/*** @Desc: gzip compressed * @Author: ZRP * @Params: [Data] * @Return: byte[] * @Date: 2017/11/9 9:43 */     Public Static byte[] gzip (byte[] data)throwsException {bytearrayoutputstream BOS=NewBytearrayoutputstream (); Gzipoutputstream gzip=NewGzipoutputstream (BOS);        Gzip.write (data);        Gzip.finish ();        Gzip.close (); byte[] ret =Bos.tobytearray ();        Bos.close (); returnret; }    /*** @Desc: gzip uncompressed * @Author: ZRP * @Params: [Data] * @Return: byte[] * @Date: 2017/11/9 9:47 */     Public Static byte[] Ungzip (byte[] data)throwsexception{Bytearrayinputstream bis=Newbytearrayinputstream (data); Gzipinputstream gzip=NewGzipinputstream (bis); byte[] buf =New byte[1024]; intnum =-1; Bytearrayoutputstream Bos=NewBytearrayoutputstream ();  while(num = gzip.read (buf, 0, buf.length))! =-1) {bos.write (buf,0, num);        } gzip.close ();        Bis.close (); byte[] ret =Bos.tobytearray ();        Bos.flush ();        Bos.close (); returnret; }    /*** Test compression and restore *@paramargs *@throwsException*/     Public Static voidMain (string[] args)throwsexception{//Read FileString Readpath = System.getproperty ("User.dir") + File.separatorchar + "sources" + File.separatorchar + "001.jpg"; File File=NewFile (Readpath); FileInputStream in=Newfileinputstream (file); byte[] data =New byte[In.available ()];        In.read (data);        In.close (); System.out.println ("File Original size:" +data.length); //Test Compression        byte[] Ret1 =gziputil.gzip (data); System.out.println ("Size after compression:" +ret1.length); byte[] Ret2 =Gziputil.ungzip (RET1); System.out.println ("Size after Restore:" +ret2.length); //Write a fileString Writepath = System.getproperty ("User.dir") + File.separatorchar + "receive" + File.separatorchar + "001.jpg"; FileOutputStream Fos=NewFileOutputStream (Writepath);        Fos.write (Ret2);    Fos.close (); }}

170814, Java using gzip compressed files, restore files