public static void unGzipFile(String sourcedir) {

         String ouputfile = "";

         try {

             //建立gzip压缩文件输入流

             FileInputStream fin = new FileInputStream(sourcedir);

             //建立gzip解压工作流

             GZIPInputStream gzin = new GZIPInputStream(fin);

             //建立解压文件输出流

             ouputfile = sourcedir.substring(0,sourcedir.lastIndexOf('.'));

             ouputfile = ouputfile.substring(0,ouputfile.lastIndexOf('.'));

             FileOutputStream fout = new FileOutputStream(ouputfile);   

             int num;

             byte[] buf=new byte[1024];

             while ((num = gzin.read(buf,0,buf.length)) != -1)

             {

                 fout.write(buf,0,num);

             }

             gzin.close();

             fout.close();

             fin.close();

         } catch (Exception ex){

             System.err.println(ex.toString());

         }

         return;

     }  

 /**

      * 解压缩zipFile

      * @param file 要解压的zip文件对象

      * @param outputDir 要解压到某个指定的目录下

      * @throws IOException

      */

     public static void unZip(File file,String outputDir) throws IOException {

         ZipFile zipFile = null;  

         try {

             Charset CP866 = Charset.forName("CP866");  //specifying alternative (non UTF-8) charset

             //ZipFile zipFile = new ZipFile(zipArchive, CP866);

             zipFile =  new ZipFile(file, CP866);

             createDirectory(outputDir,null);//创建输出目录  

             Enumeration<?> enums = zipFile.entries();

             while(enums.hasMoreElements()){  

                 ZipEntry entry = (ZipEntry) enums.nextElement();

                 System.out.println("解压." +  entry.getName());  

                 if(entry.isDirectory()){//是目录

                     createDirectory(outputDir,entry.getName());//创建空目录

                 }else{//是文件

                     File tmpFile = new File(outputDir + "/" + entry.getName());

                     createDirectory(tmpFile.getParent() + "/",null);//创建输出目录  

                     InputStream in = null;

                     OutputStream out = null;

                     try{

                         in = zipFile.getInputStream(entry);;

                         out = new FileOutputStream(tmpFile);

                         int length = 0;  

                         byte[] b = new byte[2048];

                         while((length = in.read(b)) != -1){

                             out.write(b, 0, length);

                         }  

                     }catch(IOException ex){

                         throw ex;

                     }finally{

                         if(in!=null)

                             in.close();

                         if(out!=null)

                             out.close();

                     }

                 }

             }  

         } catch (IOException e) {

             throw new IOException("解压缩文件出现异常",e);

         } finally{

             try{

                 if(zipFile != null){

                     zipFile.close();

                 }

             }catch(IOException ex){

                 throw new IOException("关闭zipFile出现异常",ex);

             }

         }

     }  

     /**

      * 构建目录

      * @param outputDir

      * @param subDir

      */

     public static void createDirectory(String outputDir,String subDir){

         File file = new File(outputDir);

         if(!(subDir == null || subDir.trim().equals(""))){//子目录不为空

             file = new File(outputDir + "/" + subDir);

         }

         if(!file.exists()){

               if(!file.getParentFile().exists())

                   file.getParentFile().mkdirs();

             file.mkdirs();

         }

     }  

  //------------------------------------------------------------------------------------------------------

     /**

      * 解压tar.gz 文件

      * @param file 要解压的tar.gz文件对象

      * @param outputDir 要解压到某个指定的目录下

      * @throws IOException

      */

     public static void unTarGz(File file,String outputDir) throws IOException{

         TarInputStream tarIn = null;

         try{

             tarIn = new TarInputStream(new GZIPInputStream(

                     new BufferedInputStream(new FileInputStream(file))),

                     1024 * 2);  

             createDirectory(outputDir,null);//创建输出目录  

             TarEntry entry = null;

             while( (entry = tarIn.getNextEntry()) != null ){  

                 if(entry.isDirectory()){//是目录

                     entry.getName();

                     createDirectory(outputDir,entry.getName());//创建空目录

                 }else{//是文件

                     File tmpFile = new File(outputDir + "/" + entry.getName());

                     createDirectory(tmpFile.getParent() + "/",null);//创建输出目录

                     OutputStream out = null;

                     try{

                         out = new FileOutputStream(tmpFile);

                         int length = 0;  

                         byte[] b = new byte[2048];  

                         while((length = tarIn.read(b)) != -1){

                             out.write(b, 0, length);

                         }  

                     }catch(IOException ex){

                         throw ex;

                     }finally{  

                         if(out!=null)

                             out.close();

                     }

                 }

             }

         }catch(IOException ex){

             throw new IOException("解压归档文件出现异常",ex);

         } finally{

             try{

                 if(tarIn != null){

                     tarIn.close();

                 }

             }catch(IOException ex){

                 throw new IOException("关闭tarFile出现异常",ex);

             }

         }

     }  

 import java.io.BufferedInputStream;

 import java.io.File;

 import java.io.FileInputStream;

 import java.io.FileOutputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.OutputStream;

 import java.nio.charset.Charset;

 import java.util.Enumeration;

 import java.util.zip.GZIPInputStream;

 import java.util.zip.ZipEntry;

 import java.util.zip.ZipFile;

 import org.apache.tools.tar.TarEntry;

 import org.apache.tools.tar.TarInputStream;

 import org.apache.tools.tar.TarOutputStream;