标签:style class blog c java ext
import java.io.ByteArrayOutputStream;
import
java.io.DataOutputStream;
import java.io.IOException;
import
java.util.zip.GZIPInputStream;
import
java.util.zip.GZIPOutputStream;
import java.util.zip.ZipEntry;
import
java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import org.apache.tools.bzip2.CBZip2InputStream;
import
org.apache.tools.bzip2.CBZip2OutputStream;
import com.jcraft.jzlib.JZlib;
import
com.jcraft.jzlib.ZInputStream;
import com.jcraft.jzlib.ZOutputStream;
public class Test {
/***
* 压缩GZip
*
* @param data
* @return
*/
public static byte[] gZip(byte[] data) {
byte[] b =
null;
try {
ByteArrayOutputStream bos = new
ByteArrayOutputStream();
GZIPOutputStream gzip = new
GZIPOutputStream(bos);
gzip.write(data);
gzip.finish();
gzip.close();
b =
bos.toByteArray();
bos.close();
} catch (Exception ex)
{
ex.printStackTrace();
}
return
b;
}
/***
* 解压GZip
*
* @param data
* @return
*/
public static byte[] unGZip(byte[] data) {
byte[] b
= null;
try {
ByteArrayInputStream bis = new
ByteArrayInputStream(data);
GZIPInputStream gzip = new
GZIPInputStream(bis);
byte[] buf = new
byte[1024];
int num = -1;
ByteArrayOutputStream
baos = new ByteArrayOutputStream();
while ((num = gzip.read(buf,
0, buf.length)) != -1) {
baos.write(buf, 0,
num);
}
b = baos.toByteArray();
baos.flush();
baos.close();
gzip.close();
bis.close();
} catch (Exception ex)
{
ex.printStackTrace();
}
return
b;
}
#################################################################################
/***
* 压缩Zip
*
* @param data
* @return
*/
public static byte[] zip(byte[] data) {
byte[] b =
null;
try {
ByteArrayOutputStream bos = new
ByteArrayOutputStream();
ZipOutputStream zip = new
ZipOutputStream(bos);
ZipEntry entry = new
ZipEntry("zip");
entry.setSize(data.length);
zip.putNextEntry(entry);
zip.write(data);
zip.closeEntry();
zip.close();
b =
bos.toByteArray();
bos.close();
} catch (Exception ex)
{
ex.printStackTrace();
}
return
b;
}
/***
* 解压Zip
*
* @param data
* @return
*/
public static byte[] unZip(byte[] data) {
byte[] b
= null;
try {
ByteArrayInputStream bis = new
ByteArrayInputStream(data);
ZipInputStream zip = new
ZipInputStream(bis);
while (zip.getNextEntry() != null)
{
byte[] buf = new byte[1024];
int
num = -1;
ByteArrayOutputStream baos = new
ByteArrayOutputStream();
while ((num = zip.read(buf, 0,
buf.length)) != -1) {
baos.write(buf, 0,
num);
}
b =
baos.toByteArray();
baos.flush();
baos.close();
}
zip.close();
bis.close();
} catch (Exception ex) {
ex.printStackTrace();
}
return b;
}
#######################################################################################
/***
* 压缩BZip2
*
* @param data
* @return
*/
public static byte[] bZip2(byte[] data) {
byte[] b
= null;
try {
ByteArrayOutputStream bos = new
ByteArrayOutputStream();
CBZip2OutputStream bzip2 = new
CBZip2OutputStream(bos);
bzip2.write(data);
bzip2.flush();
bzip2.close();
b =
bos.toByteArray();
bos.close();
} catch (Exception ex)
{
ex.printStackTrace();
}
return
b;
}
/***
* 解压BZip2
*
* @param data
* @return
*/
public static byte[] unBZip2(byte[] data) {
byte[]
b = null;
try {
ByteArrayInputStream bis = new
ByteArrayInputStream(data);
CBZip2InputStream bzip2 = new
CBZip2InputStream(bis);
byte[] buf = new
byte[1024];
int num = -1;
ByteArrayOutputStream
baos = new ByteArrayOutputStream();
while ((num =
bzip2.read(buf, 0, buf.length)) != -1) {
baos.write(buf,
0, num);
}
b =
baos.toByteArray();
baos.flush();
baos.close();
bzip2.close();
bis.close();
} catch (Exception ex) {
ex.printStackTrace();
}
return b;
}
###############################################################################
/**
*
把字节数组转换成16进制字符串
*
* @param bArray
*
@return
*/
public static String
bytesToHexString(byte[] bArray) {
StringBuffer sb = new
StringBuffer(bArray.length);
String sTemp;
for (int i = 0; i
< bArray.length; i++) {
sTemp = Integer.toHexString(0xFF
& bArray[i]);
if (sTemp.length() <
2)
sb.append(0);
sb.append(sTemp.toUpperCase());
}
return
sb.toString();
}
###################################################################################
/**
*jzlib
压缩数据
*
* @param object
* @return
*
@throws IOException
*/
public static byte[] jzlib(byte[]
object) {
byte[] data = null;
try {
ByteArrayOutputStream out = new ByteArrayOutputStream();
ZOutputStream zOut = new ZOutputStream(out,
JZlib.Z_DEFAULT_COMPRESSION);
DataOutputStream objOut = new
DataOutputStream(zOut);
objOut.write(object);
objOut.flush();
zOut.close();
data =
out.toByteArray();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
return data;
}
/**
*jzLib压缩的数据
*
* @param object
*
@return
* @throws IOException
*/
public
static byte[] unjzlib(byte[] object) {
byte[] data = null;
try {
ByteArrayInputStream in = new ByteArrayInputStream(object);
ZInputStream zIn = new ZInputStream(in);
byte[] buf = new
byte[1024];
int num = -1;
ByteArrayOutputStream
baos = new ByteArrayOutputStream();
while ((num = zIn.read(buf,
0, buf.length)) != -1) {
baos.write(buf, 0,
num);
}
data =
baos.toByteArray();
baos.flush();
baos.close();
zIn.close();
in.close();
} catch (IOException e)
{
e.printStackTrace();
}
return
data;
}
public static void main(String[] args) {
String s = "this is
a test";
byte[] b1 = zip(s.getBytes());
System.out.println("zip:" + bytesToHexString(b1));
byte[] b2 =
unZip(b1);
System.out.println("unZip:" + new String(b2));
byte[] b3 = bZip2(s.getBytes());
System.out.println("bZip2:"
+ bytesToHexString(b3));
byte[] b4 = unBZip2(b3);
System.out.println("unBZip2:" + new String(b4));
byte[] b5 = gZip(s.getBytes());
System.out.println("bZip2:"
+ bytesToHexString(b5));
byte[] b6 = unGZip(b5);
System.out.println("unBZip2:" + new String(b6));
byte[] b7 = jzlib(s.getBytes());
System.out.println("jzlib:"
+ bytesToHexString(b7));
byte[] b8 = unjzlib(b7);
System.out.println("unjzlib:" + new String(b8));
}
}
Java对byte数组压缩 解压缩 (zip,gzip,bzip2,jzlib),布布扣,bubuko.com
Java对byte数组压缩 解压缩 (zip,gzip,bzip2,jzlib)
标签:style class blog c java ext
原文地址:http://www.cnblogs.com/zhangyukun/p/3748120.html