# 如何以 GZIP 格式壓縮文件 > 原文： [https://beginnersbook.com/2014/07/how-to-compress-a-file-in-gzip-format/](https://beginnersbook.com/2014/07/how-to-compress-a-file-in-gzip-format/) 以下代碼將指定的文件壓縮為 GZip 格式。在下面的示例中，我們在`B`驅動器的`Java`文件夾下中有一個文本文件，我們正在壓縮并生成同一文件夾中的 GZip 文件。 ```java 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(); } } } ``` **輸出：** ```java File Compressed!! ``` **參考：** [`GZIPOutputStream` javadoc](https://docs.oracle.com/javase/7/docs/api/java/util/zip/GZIPOutputStream.html)