java压缩大全

import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.util.zip.DataFormatException;import java.util.zip.Deflater;import java.util.zip.GZIPInputStream;import java.util.zip.GZIPOutputStream;import java.util.zip.Inflater;import java.util.zip.ZipEntry;import java.util.zip.ZipException;import java.util.zip.ZipInputStream;import java.util.zip.ZipOutputStream;import org.apache.log4j.Logger;import org.apache.tools.bzip2.CBZip2InputStream;import org.apache.tools.bzip2.CBZip2OutputStream;public class ZipUtil { private static final Logger LOG = Logger.getLogger(ZipUtil.class); private static final int BUFF_SIZE = 4096; /*************************************************************************** * 压缩GZip * * @param data * @author taoyi * @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 * @author taoyi * @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 * @author zhouxaobo * @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 * @author zhouxxiaobo * @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 * @author zhouxiaobo * @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 * @author zhouxiaobo * @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; } /** * * @param str * 待压缩的字符串 * @return * @throws IOException * @author zhouxiaobo */ public static String compress(String str) throws IOException { if (str == null || str.length() == 0) { return str; } ByteArrayOutputStream out = new ByteArrayOutputStream(); GZIPOutputStream gzip = new GZIPOutputStream(out); gzip.write(str.getBytes()); gzip.close(); System.out.println("压缩后：" + out.toString()); return out.toString("GBK"); } /** * * @param str * 已压缩的字符串 * @return * @throws IOException * @author taoyi */ public static String uncompress(String str) throws IOException { if (str == null || str.length() == 0) { return str; } ByteArrayOutputStream out = new ByteArrayOutputStream(); ByteArrayInputStream in = new ByteArrayInputStream(str.getBytes("GBK")); GZIPInputStream gunzip = new GZIPInputStream(in); byte[] buffer = new byte[256]; int n; while ((n = gunzip.read(buffer)) >= 0) { out.write(buffer, 0, n); } // toString()使用平台默认编码，也可以显式的指定如toString("GBK") return out.toString("GBK"); } /** * 解压c++压缩的zlib * * @param compressedData * @return */ public static byte[] unZipInflate(byte[] compressedData) { Inflater decompressor = new Inflater(); decompressor.setInput(compressedData); // Create an expandable byte array to hold the decompressed data ByteArrayOutputStream bos = new ByteArrayOutputStream( compressedData.length); // Decompress the data byte[] buf = new byte[1024]; while (!decompressor.finished()) { try { int count = decompressor.inflate(buf); bos.write(buf, 0, count); } catch (DataFormatException e) { //e.printStackTrace(); LOG.error("解压C++压缩包出错！"); break; } } try { bos.close(); } catch (IOException e) { //e.printStackTrace(); LOG.error("流关闭异常！"); } // Get the decompressed data return bos.toByteArray(); } public static String inflater(byte[] buff) { String str = null; int len = buff.length; byte[] result = new byte[len]; if ((null == buff) || (0 == len)) { return null; } try { Inflater decompresser = new Inflater(); int resultlen = 0; decompresser.setInput(buff, 0, buff.length); resultlen = decompresser.inflate(result); decompresser.end(); str = new String(result, 0, resultlen, "UTF-8"); } catch (IOException e) { // TODO: handle exception e.printStackTrace(); } catch (DataFormatException e) { // TODO Auto-generated catch block e.printStackTrace(); } return str; } /** * 压缩压缩的zlib * * @param compressedData * @return * @author zhouxiaobo */ public static byte[] ZipDnflate(byte[] compressedData) throws DataFormatException { Deflater compressor = new Deflater(); compressor.setInput(compressedData); compressor.finish(); // Create an expandable byte array to hold the decompressed data ByteArrayOutputStream bos = new ByteArrayOutputStream( compressedData.length); // Decompress the data byte[] buf = new byte[1024]; while (!compressor.finished()) { int count = compressor.deflate(buf); bos.write(buf, 0, count); } try { bos.close(); } catch (IOException e) { e.printStackTrace(); } // Get the decompressed data/* byte [] byteArrey=bos.toByteArray(); String strZip=new String(byteArrey);*/ return bos.toByteArray(); } /** * 解压协议包体部分 ,压缩格式为zip */ private static Object extract(byte[] compressed) { if (compressed == null) return null; // byte[] compressed; ByteArrayOutputStream out = null; ByteArrayInputStream in = null; ZipInputStream zin = null; Object decompressed = null; try { out = new ByteArrayOutputStream(); in = new ByteArrayInputStream(compressed); byte[] buffer = new byte[BUFF_SIZE]; int offset = -1; zin = new ZipInputStream(in); ZipEntry entry = zin.getNextEntry(); if (entry != null) { while ((offset = zin.read(buffer)) != -1) { out.write(buffer, 0, offset); } } ByteArrayInputStream byteInput = new ByteArrayInputStream(out .toByteArray()); ObjectInputStream ois = new ObjectInputStream(byteInput); decompressed = ois.readObject(); } catch (ZipException e1) { // TODO Auto-generated catch block LOG.info("获得压缩流数据出现异常！"); e1.printStackTrace(); } catch (IOException e1) { LOG.info("I/O流出现异常！"); // TODO Auto-generated catch block e1.printStackTrace(); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { if (zin != null) { try { zin.close(); zin = null; } catch (IOException e) { } } if (in != null) { try { in.close(); in = null; } catch (IOException e) { } } if (out != null) { try { out.close(); out = null; } catch (IOException e) { } } } return decompressed; }}