Compress string(byte array) by Deflater : Zip Unzip « File « Java Tutorial

1. Java Tutorial
2. File
3. Zip Unzip

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.Deflater;

public class Main {
  public static void main(String[] args) throws IOException {
    Deflater def = new Deflater();
    byte[] input = new byte[1024];
    byte[] output = new byte[1024];

    FileInputStream fin = new FileInputStream("a.dat");
    FileOutputStream fout = new FileOutputStream("b.dat");

    int numRead = fin.read(input);

    def.setInput(input, 0, numRead);

    while (!def.needsInput()) {
      int numCompressedBytes = def.deflate(output, 0, output.length);
      if (numCompressedBytes > 0) {
        fout.write(output, 0, numCompressedBytes);
      }
    }
    def.finish();
    fin.close();
    fout.flush();
    fout.close();
    def.reset();
  }
}