java - Apache Commons Untar:带有getNextTarEntry的IllegalArgumentException

我在compress apache library上遇到问题。我想解压缩包含二进制文件的档案。这是代码：

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;

public class ArchiveManager {

    public static final int BUFFER_MAX = 2048;

    public static void untar(String fileName, String targetPath) throws IOException {
        File tarArchiveFile = new File(fileName);
        BufferedOutputStream dest = null;
        FileInputStream tarArchiveStream = new FileInputStream(tarArchiveFile);
        TarArchiveInputStream tis = new TarArchiveInputStream(new BufferedInputStream(tarArchiveStream));
        TarArchiveEntry entry = null;
        try {
            while ((entry = tis.getNextTarEntry()) != null) {
                int count;
                File outputFile = new File(targetPath, entry.getName());

                if (entry.isDirectory()) { // entry is a directory
                    if (!outputFile.exists()) {
                        outputFile.mkdirs();
                    }
                } else { // entry is a file
                    byte[] data = new byte[BUFFER_MAX];
                    FileOutputStream fos = new FileOutputStream(outputFile);
                    dest = new BufferedOutputStream(fos, BUFFER_MAX);
                    while ((count = tis.read(data, 0, BUFFER_MAX)) != -1) {
                        dest.write(data, 0, count);
                    }
                    dest.flush();
                    dest.close();
                }
            }
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            if (dest != null) {
                dest.flush();
                dest.close();
            }
            tis.close();
        }
    }
}

解压缩二进制文件时，getNextTarEntry()引发异常：

java.lang.IllegalArgumentException: Invalid byte 111 at offset 0 in 'o.txt{NUL}{NUL}{NUL}' len=8
    at org.apache.commons.compress.archivers.tar.TarUtils.parseOctal(TarUtils.java:99)
    at org.apache.commons.compress.archivers.tar.TarArchiveEntry.parseTarHeader(TarArchiveEntry.java:786)
    at org.apache.commons.compress.archivers.tar.TarArchiveEntry.<init>(TarArchiveEntry.java:308)
    at org.apache.commons.compress.archivers.tar.TarArchiveInputStream.getNextTarEntry(TarArchiveInputStream.java:198)
    at com.airbus.pakito.download.ArchiveManager.untar(ArchiveManager.java:22)

我试图解压简单的文本文件。解压最后一个文件后，getNextTarEntry()不会返回null，而是返回具有空文件的对象。因此entry.getName()为空，显然new FileOutputStream(outputFile)无法创建文件。

java.io.FileNotFoundException: C:\Temp (Accès refusé)
    at java.io.FileOutputStream.open(Native Method)
    at java.io.FileOutputStream.<init>(Unknown Source)
    at java.io.FileOutputStream.<init>(Unknown Source)
    at com.airbus.pakito.util.Archive.untar(Archive.java:32)

您有问题的根源吗？

谢谢。

最佳答案

我终于找出问题的根源。

这是a known bug，已在1.4版的Apache compress中修复。我希望此版本为available very soon。

关于java - Apache Commons Untar:带有getNextTarEntry的IllegalArgumentException，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/9631527/