好的,所以我想读取tar.gz文件(或xy)的内容,但这是同一回事。我正在做的或多或少是这样的:
TarArchiveInputStream tarInput = new TarArchiveInputStream(new GzipCompressorInputStream(new FileInputStream("c://temp//test.tar.gz")));
TarArchiveEntry currentEntry = tarInput.getNextTarEntry();
BufferedReader br = null;
StringBuilder sb = new StringBuilder();
while (currentEntry != null) {
File f = currentEntry.getFile();
br = new BufferedReader(new FileReader(f));
System.out.println("For File = " + currentEntry.getName());
String line;
while ((line = br.readLine()) != null) {
System.out.println("line="+line);
}
}
if (br!=null) {
br.close();
}
但是,当我调用的getFile
方法时,我会得到null TarArchiveEntry
。
我正在使用Apache Commons compress 1.8.1
您不能使用TarArchiveEntry的getFile。当您压缩tar文件中的文件时,该getter仅用于相反的操作。
相反,您应该直接从TarArchiveInputStream阅读。它将负责向您返回动态解压缩的“文件”内容。
例如(未经测试的代码,YMMV):
TarArchiveInputStream tarInput = new TarArchiveInputStream(new GzipCompressorInputStream(new FileInputStream("c://temp//test.tar.gz")));
TarArchiveEntry currentEntry = tarInput.getNextTarEntry();
BufferedReader br = null;
StringBuilder sb = new StringBuilder();
while (currentEntry != null) {
br = new BufferedReader(new InputStreamReader(tarInput)); // Read directly from tarInput
System.out.println("For File = " + currentEntry.getName());
String line;
while ((line = br.readLine()) != null) {
System.out.println("line="+line);
}
currentEntry = tarInput.getNextTarEntry(); // You forgot to iterate to the next file
}
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我来说两句