java解壓縮文件代碼

/
 a simple unZIP tool
 ex.  java UnZip file.zip file1   to unzip file 1 from file.zip      java UnZip file.zip         to unzip file.zip 
**/
import java.io.;
import java.util.;
import java.util.zip.;
import java.text.;

class UnZip {
  public static void main(String args[]) throws IOException {
    InputStream in = 
      new BufferedInputStream(new FileInputStream(args[0]));
    ZipInputStream zin = new ZipInputStream(in);
    ZipEntry e;

while((e=zin.getNextEntry())!= null) {
  if (args.length > 1) {
    if (e.getName().equals(args[1])) {
       unzip(zin, args[1]);
       break;
      }
    }
   unzip(zin, e.getName());
  }
zin.close();
}


public static void unzip(ZipInputStream zin, String s) 
     throws IOException {
    System.out.println("unzipping " + s);
    FileOutputStream out = new FileOutputStream(s);
    byte [] b = new byte[512];
    int len = 0;
    while ( (len=zin.read(b))!= -1 ) {
      out.write(b,0,len);
      }
    out.close();
    }
}</pre>