Java代码执行shell命令的实现

boolean isWindows = System.getProperty("os.name").toLowerCase().startsWith("windows");

private static class StreamGobbler implements Runnable {
  private InputStream inputStream;
  private Consumer<String> consumer;
 
  public StreamGobbler(InputStream inputStream, Consumer<String> consumer) {
    this.inputStream = inputStream;
    this.consumer = consumer;
  }
 
  @Override
  public void run() {
    new BufferedReader(new InputStreamReader(inputStream)).lines()
     .forEach(consumer);
  }
}

String homeDirectory = System.getProperty("user.home");
Process process;
if (isWindows) {
  process = Runtime.getRuntime()
   .exec(String.format("cmd.exe /c dir %s", homeDirectory));
} else {
  process = Runtime.getRuntime()
   .exec(String.format("sh -c ls %s", homeDirectory));
}
StreamGobbler streamGobbler = 
 new StreamGobbler(process.getInputStream(), System.out::println);
Executors.newSingleThreadExecutor().submit(streamGobbler);
int exitCode = process.waitFor();
assert exitCode == 0;

ProcessBuilder builder = new ProcessBuilder();
if (isWindows) {
  builder.command("cmd.exe", "/c", "dir");
} else {
  builder.command("sh", "-c", "ls");
}
builder.directory(new File(System.getProperty("user.home")));
Process process = builder.start();
StreamGobbler streamGobbler = 
 new StreamGobbler(process.getInputStream(), System.out::println);
Executors.newSingleThreadExecutor().submit(streamGobbler);
int exitCode = process.waitFor();
assert exitCode == 0;