Question

我希望能够在Java中在Mac OSX上运行系统命令。我的代码如下所示：

public void checkDisks() throws IOException, InterruptedException {
    Process p = Runtime.getRuntime().exec("df -h");
    int exitValue = p.waitFor();
    System.out.println("Process exitValue:" + exitValue);


    BufferedReader reader = new BufferedReader(new InputStreamReader(
                                                 p.getInputStream()));
    String line = reader.readLine();
    while (line != null) {
        line = reader.readLine();
    }
    System.out.println(line);
}

这总是返回null，exitValue为0.在Java之前从未这样做过，所以任何想法或建议都非常感激。

Answer 1

您的代码几乎没问题，您只是放错了println

public void checkDisks() throws IOException, InterruptedException {
    Process p = Runtime.getRuntime().exec("df -h");
    int exitValue = p.waitFor();
    System.out.println("Process exitValue:" + exitValue);


    BufferedReader reader = new BufferedReader(new InputStreamReader(
                                                 p.getInputStream()));
    String line = reader.readLine();
    while (line != null) {
        line = reader.readLine();
        System.out.println(line);
    }
}

我相信这是你想要实现的目标。

Answer 2

试试这个

public void checkDisks() throws IOException, InterruptedException {
    Process p = Runtime.getRuntime().exec(new String[]{"df","-h"});
    int exitValue = p.waitFor();
    BufferedReader reader = new BufferedReader(new InputStreamReader(
                                                 p.getInputStream()));
    String line;
    while ((line=reader.readLine()) != null) {
            System.out.println(line);
    }
    System.out.println("Process exitValue:" + exitValue);
}

在Mac上用Java执行系统命令

2 个答案: