【Java】java和android网络编程 - 对byte数组压缩和解压缩(zip,gzip,bzip2,jzlib)

无论是java还是android 都需要对网络字节进行加密和压缩。

这里转载了一些压缩和解压缩的方法，可用于android的网络编程

//导入bzip2.jar和jzlib相关java文件

 

import java.io.ByteArrayInputStream;
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();
 }

 /**
  * 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;
 }

 /**
  * 解压被压缩的数据
  * 
  * @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));
 }
}

 

//输出结果

zip:504B03041400080008008B82CC3A000000000000000000000000030000007A69702BC9C82C5600A2448592D4E21200504B0708EAE71E0D0E0000000E000000504B010214001400080008008B82CC3AEAE71E0D0E0000000E0000000300000000000000000000000000000000007A6970504B05060000000001000100310000003F0000000000
unZip:this is a test
bZip2:6839314159265359F81D428D0000061180400022600C00200021A34CD42180A9B16D11D0F177245385090F81D428D0
unBZip2:this is a test
bZip2:1F8B08000000000000002BC9C82C5600A2448592D4E21200EAE71E0D0E000000
unBZip2:this is a test
jzlib:789C2BC9C82C5600A2448592D4E2120026330516
unjzlib:this is a test

转自：http://blog.csdn.net/xue1225go/article/details/4263850