我正在尝试解压缩一些zip文件，它的大小约为65兆。下面的代码段：

此方法实际上将文件解压缩：

public synchronized void execute(Path zipFile) {

final ProcessBuilder builder = new ProcessBuilder("/bin/unzip",zipFile.toAbsolutePath().toString(), "-d", dir.toAbsolutePath().toString());

FutureTask task = new FutureTask(new Callable() {

@Override public Integer call() {

try {

System.out.println("started and waiting");

int status = builder.start().waitFor();

System.out.println("status: " + status);

return status;

} catch (InterruptedException e) {

} catch (IOException e) {

}

return 0;

}

});

List> tasks = new ArrayList>();

tasks.add(task);

System.out.println("task added");

ExecutorService executor = Executors.newCachedThreadPool();

for (FutureTask t : tasks) {

executor.submit(t);

System.out.println("submitted");

}

executor.shutdown();

System.out.println("shutdown");

}

那个执行者/未来的东西只是为了确保我正确地做。在类Finder中调用此方法，该类在目录中查找zip文件并尝试将其解压缩。它基于此代码http://docs.oracle.com/javase/tutorial/essential/io/walk.html

具体来说：

@Override

public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {

if (find(file)) {

synchronized(Finder.class) {

executor.execute(file);

}

}

return CONTINUE;

}

现在的问题。真的很有趣。每当我通过此代码提取某些内容时，该zip文件实际上就会被解压缩，但是只有某些目录会被解压缩，而其他目录则不会。例如，我有一个目录为temp

foo和bar的zip文件，但解压缩后仅存在temp和foo目录，并且未提取bar。

输出是：

task added

submitted

started and waiting

shutdown

为什么没有“状态=某物”输出？

我不明白为什么会这样。当我手动解压缩时，它会正确解压缩。

//编辑

这成功了

@Override

public synchronized void execute(String file, String dest) {

ProcessBuilder pb = new ProcessBuilder("/bin/unzip","-qq", file, "-d", dest);

pb.redirectErrorStream(true);

try {

Process p = pb.start();

InputStream is = p.getInputStream();

InputStreamReader r = new InputStreamReader(is);

BufferedReader in = new BufferedReader(r);

String line;

while ((line = in.readLine()) != null) {

// because of the -qq option, it does actually write out nothing

System.out.println(line);

}

} catch (IOException ex) {

System.err.println(ex.getMessage());

}

}