用Java解压缩Gzip存档

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;

public class GzipDecompressor {
    public static void main(String[] args) throws IOException {
        String inputFile = "input.gz";
        String outputFile = "output.txt";

        try (FileInputStream fileIn = new FileInputStream(inputFile);
             BufferedInputStream in = new BufferedInputStream(fileIn);
             GZIPInputStream gzipIn = new GZIPInputStream(in);
             FileOutputStream out = new FileOutputStream(outputFile)) {

            byte[] buffer = new byte[1024];
            int len;
            while ((len = gzipIn.read(buffer)) > 0) {
                out.write(buffer, 0, len);
            }
        }
    }
}