unzip error
I'm compressing a byte[] and trying to decompressing it again.
When array is small there're no problems. But when size gets 507 or plus, the unzip returns a lot o 0 (zeros) in the end of the result.
publicvoid testZip()throws Exception{
byte[] b =newbyte[1024];
for(int i = 0; i < b.length; i++)
b[i] = getRandom();
byte[] z = zip(b);
byte[] u = unzip(z);
System.out.println(b.length +": " + byteArrayToHex(b));
System.out.println(u.length +": " + byteArrayToHex(u));
System.out.println(z.length +": " + byteArrayToHex(z));
}
privatestaticbyte getRandom(){
byte b = (byte)(Math.random() * 1000);
if (b == 0)
return getRandom();
return b;
}
privatebyte[] zip(byte[] bData)throws Exception{
long lTam = bData.length;
ByteArrayOutputStream baos =new ByteArrayOutputStream();
ZipOutputStream zip =new ZipOutputStream(baos);
zip. putNextEntry(new ZipEntry("test"));
zip.write(bData);
zip.close();
bData = baos.toByteArray();
byte[] bFinal =newbyte[4 + bData.length];
bFinal[0] = (byte)lTam;
bFinal[1] = (byte)(lTam>>8);
bFinal[2] = (byte)(lTam>>16);
bFinal[3] = (byte)(lTam>>24);
System.arraycopy(bData, 0, bFinal, 4, bData.length);
return bFinal;
}
privatebyte[] unzip(byte[] bFinal)throws Exception{
long lTam = (bFinal[0]&255)|((bFinal[1]&255)<<8)|((bFinal[2]&255)<<16)|((bFinal[3]&255)<<24);
byte[] b =newbyte[(int)lTam];
ByteArrayInputStream bais =new ByteArrayInputStream(bFinal, 4, bFinal.length-4);
ZipInputStream zip =new ZipInputStream(bais);
zip.getNextEntry();
zip.read(b);
zip.close();
return b;
}
any ideas?
thks
