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%)");
        }
    }
}