java - 如何使用 Apache Commons 解压 TAR 文件

Question

我正在使用 Apache Commons 1.4.1 库压缩和解压缩 ".tar.gz" 文件。

我在最后一点遇到了麻烦——将 TarArchiveInputStream 转换为 FileOutputStream。

奇怪的是，它在这条线上中断了:

FileOutputStream fout = new FileOutputStream(destPath);

---

destPath 是一个具有规范路径的文件:C:\Documents and Settings\Administrator\My Documents\JavaWorkspace\BackupUtility\untarred\Test\subdir\testinsub.txt

产生的错误:

Exception in thread "main" java.io.IOException: The system cannot find the path specified

知道它可能是什么吗？为什么找不到路径？

我在下面附加了整个方法(其中大部分是从 here 中提取的)。

private void untar(File dest) throws IOException {
    dest.mkdir();
    TarArchiveEntry tarEntry = tarIn.getNextTarEntry();
    // tarIn is a TarArchiveInputStream
    while (tarEntry != null) {// create a file with the same name as the tarEntry
        File destPath = new File(dest.toString() + System.getProperty("file.separator") + tarEntry.getName());
        System.out.println("working: " + destPath.getCanonicalPath());
        if (tarEntry.isDirectory()) {
            destPath.mkdirs();
        } else {
            destPath.createNewFile();
            FileOutputStream fout = new FileOutputStream(destPath);
            tarIn.read(new byte[(int) tarEntry.getSize()]);
            fout.close();
        }
        tarEntry = tarIn.getNextTarEntry();
    }
    tarIn.close();
}

Answer 1

您的程序有 java 堆空间错误。 所以我认为需要做一些改变。 这是代码...

public static void uncompressTarGZ(File tarFile, File dest) throws IOException {
    dest.mkdir();
    TarArchiveInputStream tarIn = null;

    tarIn = new TarArchiveInputStream(
                new GzipCompressorInputStream(
                    new BufferedInputStream(
                        new FileInputStream(
                            tarFile
                        )
                    )
                )
            );

    TarArchiveEntry tarEntry = tarIn.getNextTarEntry();
    // tarIn is a TarArchiveInputStream
    while (tarEntry != null) {// create a file with the same name as the tarEntry
        File destPath = new File(dest, tarEntry.getName());
        System.out.println("working: " + destPath.getCanonicalPath());
        if (tarEntry.isDirectory()) {
            destPath.mkdirs();
        } else {
            destPath.createNewFile();
            //byte [] btoRead = new byte[(int)tarEntry.getSize()];
            byte [] btoRead = new byte[1024];
            //FileInputStream fin 
            //  = new FileInputStream(destPath.getCanonicalPath());
            BufferedOutputStream bout = 
                new BufferedOutputStream(new FileOutputStream(destPath));
            int len = 0;

            while((len = tarIn.read(btoRead)) != -1)
            {
                bout.write(btoRead,0,len);
            }

            bout.close();
            btoRead = null;

        }
        tarEntry = tarIn.getNextTarEntry();
    }
    tarIn.close();
} 

祝你好运