压缩和解压缩gz包

gz是Linux和OSX中常见的压缩文件格式，下面是用java压缩和解压缩gz包的例子

 public class GZIPcompress {

     public static void FileCompress(String file, String outgz) throws IOException {
         BufferedReader br = new BufferedReader(new FileReader(file));
         BufferedOutputStream bs = new BufferedOutputStream(new GZIPOutputStream(new FileOutputStream(outgz)));

         int c;
         while ((c = br.read()) != -1) {
             bs.write(c);
         }
         br.close();
         bs.close();
     }

     public static String FileUnCompress(String filegz) throws IOException {
         BufferedReader bf = new BufferedReader(new InputStreamReader(new GZIPInputStream(new FileInputStream(filegz))));
         String s;
         StringBuffer sb = new StringBuffer();
         while ((s = bf.readLine()) != null) {
             sb.append(s);
         }
         bf.close();
         return sb.toString();
     }

     public static void main(String[] args) throws IOException {
         String fileOut = "test.gz";
         String in = "test.txt";

         FileCompress(in, fileOut);
         String out = FileUnCompress(fileOut);

         System.out.println(out);
     }

 }