zipstuff.java

相似度匹配程序。可以用来匹配任何你想得到的信息格式

//
//  ZipStuff.java
//  Simphile
//
//  Created by Brian Risk on Thu May 09 2002.
//  Copyright (c) 2002 Geneffects. All rights reserved.
//

import java.io.*;
import java.util.zip.*;

public abstract class ZipStuff {

    public static long GZip(File f) {
        return GZip(f, null);
    }
    
    public static long GZip(File f, File f2) {
        long out = 0;
        BufferedInputStream bis = null;
        BufferedInputStream bis2 = null;
        try {
            bis =	new BufferedInputStream(
                        new FileInputStream(f));
            if (f2 != null) {
                bis2 =	new BufferedInputStream(
                        new FileInputStream(f2));
            }
        } catch (FileNotFoundException e) {}
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            BufferedOutputStream bos = new BufferedOutputStream(baos);
            GZIPOutputStream gzos = new GZIPOutputStream(bos);
            
            transferStreams(bis, gzos);
            if (f2 != null) {transferStreams(bis2, gzos);}
            gzos.finish();
            gzos.flush();
            out = baos.size();
            bis.close();
            if (f2 != null) {bis2.close();}
            bos.close();
        } catch (IOException e) {}
        return out;
    }
    
    private static void transferStreams(BufferedInputStream is, GZIPOutputStream os) {
        try {
            int bufferSize = 1024;
            int count = 0;
            while (is.available() > 0) {
                byte [] pony = new byte[bufferSize];
                while (is.available() >= bufferSize) {
                    count++;
                    is.read(pony, 0, bufferSize);
                    os.write(pony, 0, bufferSize);
                }
                bufferSize /= 2;
            }
        } catch (IOException e) {}
    }
    
}