运行 linux 命令来自 java

run linux command from java

我尝试从 jar 文件 运行 linux 命令,但我总是收到此错误:

java.io.IOException:无法运行编程"ls":错误=13,权限被拒绝。

这是我的代码:

String s;
    Process p;
    String cmd= "ls";

    try {
        Runtime run = Runtime.getRuntime();
        p = run.exec(cmd);
        BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));

        while ((s = br.readLine()) != null){
        System.out.println("line: " + s);
        }

        p.waitFor();
        System.out.println ("exit: " + p.exitValue());
        p.destroy();

    } catch (Exception e) {
        System.out.println(e);
    }

感谢您抽出时间。

更新: 对我来说,我的解决方案是:我必须重新安装 OS 和 JDK,现在一切正常。

希望您熟悉vi。如果不是,请忽略下面给出的第三条命令,只需将 Main.java 文件复制到 /Users/your-user-directory/

cd ~
pwd
vi Main.java
javac Main.java
java Main

Main.java

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) {
        String s;
        Process p;
        String cmd = "ls";

        try {
            Runtime run = Runtime.getRuntime();
            p = run.exec(cmd);
            BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));

            while ((s = br.readLine()) != null) {
                System.out.println("line: " + s);
            }

            p.waitFor();
            System.out.println("exit: " + p.exitValue());
            p.destroy();

        } catch (Exception e) {
            System.out.println(e);
        }
    }
}