tar进一步压缩为.bz2包

    /** 
     * 数据压缩 
     *  
     * @param is 
     * @param os 
     * @throws Exception 
     */  
    public static void compress(InputStream is, OutputStream os)  
            throws Exception {  
      
        BZip2CompressorOutputStream gos = new BZip2CompressorOutputStream(os);  
      
        int count;  
        byte data[] = new byte[BUFFER];  
        while ((count = is.read(data, 0, BUFFER)) != -1) {  
            gos.write(data, 0, count);  
        }  
      
        gos.finish();  
      
        gos.flush();  
        gos.close();  
    }  

原文地址：https://blog.csdn.net/navagate/article/details/45956523