CompressFileGZIP

最新推荐文章于 2024-07-04 15:17:23 发布

转载最新推荐文章于 2024-07-04 15:17:23 发布 · 520 阅读

文章标签：

#string #file #input #byte #output #import

本文提供了一个使用Java实现GZIP格式压缩文件的示例代码。该程序将指定的文件压缩为.gzip格式，适用于文件体积优化场景。通过创建GZIPOutputStream并逐块读取原始文件内容进行压缩。

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.GZIPOutputStream;

public class CompressFileGZIP
{
private static void doCompressFile(String inFileName)
{
try
{
System.out.println("Creating the GZIP output stream.");
String outFileName = inFileName + ".gz";
GZIPOutputStream out = null;
try
{
out = new GZIPOutputStream(new FileOutputStream(outFileName));
}
catch (FileNotFoundException e)
{
System.err.println("Could not create file: " + outFileName);
System.exit(1);
}
System.out.println("Opening the input file.");
FileInputStream in = null;
try
{
in = new FileInputStream(inFileName);
}
catch (FileNotFoundException e)
{
System.err.println("File not found. " + inFileName);
System.exit(1);
}

System.out.println("Transfering bytes from input file to GZIP Format.");
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0)
{
out.write(buf, 0, len);
}
in.close();
System.out.println("Completing the GZIP file");
out.finish();
out.close();

}
catch (IOException e)
{
e.printStackTrace();
System.exit(1);
}
}

public static void main(String[] args)
{
doCompressFile("D://a.txt");
}