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Java建立Zip压缩文件


   import java.io.*;
  import java.util.zip.*;
  class Zip {
   public static void main(String args[]) throws IOException {
   byte b[] = new byte[512];
   ZipOutputStream zout = new ZipOutputStream(System.out);
   for(int i = 0; i < args.length; i ++) {
   InputStream in = new FileInputStream(args[i]);
   ZipEntry e = new ZipEntry(args[i].replace(File.separatorChar,'/'));
   zout.putNextEntry(e);
   int len=0;
   while((len=in.read(b)) != -1) {
   zout.write(b,0,len);
   }
   zout.closeEntry();
   print(e);
   }
   zout.close();
   }
  
   public static void print(ZipEntry e){
   PrintStream err = System.err;
   err.print("added " + e.getName());
   if (e.getMethod() == ZipEntry.DEFLATED) {
   long size = e.getSize();
   if (size > 0) {
   long csize = e.getCompressedSize();
   long ratio = ((size-csize)*100) / size;
   err.println(" (deflated " + ratio + "%)");
   }
   else {
   err.println(" (deflated 0%)");
   }
   }
   else {
   err.println(" (stored 0%)");
   }
   }
   }
  
  
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