Java运行Windows命令行命令返回一个值

Question

我想从java运行Windows命令行命令并将结果返回到java中。这可能吗？

例如，我想做以下事情

Object returnValue = runOnCommandLine("wmic cpu get LoadPercentage");//在本例中，returnValue 是字符串形式的 cpu 负载百分比

编辑:我能够让这个工作

InputStream inputStream = new ProcessBuilder("wmic", "cpu", "get", "status").start().getInputStream();
StringWriter writer = new StringWriter();
IOUtils.copy(inputStream, writer);
String theString = writer.toString();
System.out.println("My string: " + theString);

Answer 1

您需要的数据是commandOutput。

    String cmd = "wmic cpu get LoadPercentage";
    ProcessBuilder pb = new ProcessBuilder(cmd);
    pb.redirectErrorStream(true);
    Process p = pb.start();
    BufferedReader stdin = new BufferedReader(
                          new InputStreamReader(p.getInputStream()));
    StringBuilder commandOutput = new StringBuilder();
    String line;
    while ((line = stdin.readLine()) != null) {
      commandOutput.append(line);
    }
    int exitValue = -1;
    try {
     exitValue = p.waitFor();
    } catch (InterruptedException e) {
    // do something here   
    }