现象如图：

 解决：

 代码如下：

package com.java.app01;

import java.io.*;

public class ExecuteCmd {
    public static void main(String[] args){
        executCmd();
    }
    public static void executCmd(){
        Runtime runtime = Runtime.getRuntime();
        try {
            Process ipconfig = runtime.exec("ipconfig");
            InputStream inputStream = ipconfig.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream,"GBK");
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            String line;
            while ((line=bufferedReader.readLine()) !=null){
                System.out.println(line);
            }


        } catch (IOException e) {
            e.printStackTrace();
        }


    }
}