JAVA壓縮和解壓字串__JAVA壓縮字串

轉載地址：https://www.cnblogs.com/dongzhongwei/p/5964758.html

lz:叮咚^v^

/***  * 壓縮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; }/***  * 解壓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; }/***  * 壓縮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; }/***  * 解壓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; }/***  * 壓縮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; } /***  * 解壓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; }/**  * 把位元組數群組轉換成16進位字串  *   * @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 壓縮資料  *   * @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壓縮的資料  *   * @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)); }}