好的,我想阅读tar.gz文件(或xy)的内容,但这是一回事.
我正在做的或多或少是这样的：
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TarArchiveEntry的getFile方法时,我得到null.
我正在使用Apache commons compress 1.8.1
解决方法
您不能使用TarArchiveEntry的getFile.当你压缩tar文件中的文件时,那个getter仅用于相反的操作.
相反,您应该直接从TarArchiveInputStream中读取.它将负责返回“动态”解压缩它的“文件”的内容.
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
}
