Question

Noobie刚开始java时，会感激任何帮助。所以我的代码是这样的，由于某种原因，我无法让输出工作......我已经坐了几个小时..

package askisi1;

import java.net.*;
import java.util.*;
import java.lang.*;
import java.io.*;


public class Main{

public static void main(String[] args){

    try{

        String command = "ifconfig eth1 | grep -oP '[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}'";
        Process child = Runtime.getRuntime().exec(command);

        System.out.println("So far so good");
        BufferedReader r = new BufferedReader(new InputStreamReader(child.getInputStream()));
        String s;
        while ((s = r.readLine()) != null) {
        System.out.println(s);
        }
        r.close();
        System.out.println("Continue..");
    }
    catch (IOException e) {
        e.printStackTrace();
    }
}



}

Answer 1

Runtime.exec()需要一些额外的信息才能执行Unix命令。

所以，假设我的以太网卡是lo0：

String[] command = {
                    "/bin/sh",
                    "-c",
                    "ifconfig lo0 | grep -oP '[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}'"
            }; 
Process child = Runtime.getRuntime().exec(command);
// following here your remaining unchanged code

打印：

So far so good
127.0.0.1
Continue..

使用BufferedReader读取java中终端命令的输出

1 个答案: