以下代码将指定的文件压缩为 GZip 格式。在下面的示例中，我们在B驱动器的Java文件夹下中有一个文本文件，我们正在压缩并生成同一文件夹中的 GZip 文件。
import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.zip.GZIPOutputStream;public class GZipExample{ public static void main( String[] args ) { GZipExample zipObj = new GZipExample(); zipObj.gzipMyFile(); } public void gzipMyFile(){ byte[] buffer = new byte[1024]; try{ //Specify Name and Path of Output GZip file here GZIPOutputStream gos = new GZIPOutputStream(new FileOutputStream("B://Java/Myfile.gz")); //Specify location of Input file here FileInputStream fis = new FileInputStream("B://Java/Myfile.txt"); //Reading from input file and writing to output GZip file int length; while ((length = fis.read(buffer)) > 0) { /* public void write(byte[] buf, int off, int len): * Writes array of bytes to the compressed output stream. * This method will block until all the bytes are written. * Parameters: * buf - the data to be written * off - the start offset of the data * len - the length of the data */ gos.write(buffer, 0, length); } fis.close(); /* public void finish(): Finishes writing compressed * data to the output stream without closing the * underlying stream. */ gos.finish(); gos.close(); System.out.println("File Compressed!!"); }catch(IOException ioe){ ioe.printStackTrace(); } }}
输出：
File Compressed!!
