在 Java 中，允许程序向 CMD.exe 发送命令的小帮助

Posted 2023-02-23

【中文标题】在 Java 中，允许程序向 CMD.exe 发送命令的小帮助

【英文标题】：In Java, a small help to allow a program send commands to CMD.exe

【发布时间】：2020-09-29 01:25:40

【问题描述】：

我正在尝试创建一个程序（个人练习）来访问 CMD 并键入您想要的任何命令，就好像您正在使用 cmd.exe 一样；

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;

public class CMD_Live 

    public static void main(String[] args) throws IOException 

        // The purpose of this program is to use Java to perform CMD commands as if you are working on it live

        Scanner ScanCMD = new Scanner(System.in); 

        while(true) 

            System.out.print("Insert your Command> ");
            String CMDcommand = ScanCMD.nextLine();

            Process processToCMD = Runtime.getRuntime().exec(CMDcommand);
            BufferedReader readerToCMD = new BufferedReader(new InputStreamReader(processToCMD.getInputStream()));

            String line;
            while ((line = readerToCMD.readLine()) != null) 
                System.out.println(line);
            

            System.out.println();
            readerToCMD.close();
        

    

这段代码的问题是，它适用于简单的命令， 例如 ping google.com，或 nslookup google.com，

但如果我插入 nslookup 并按 Enter 进入高级模式，那么响应就会消失。 有办法解决吗？

【问题讨论】：

最后再次使用 System.in.readLine 吗？

【参考方案1】：

这应该适合你：

ProcessBuilder processBuilder = new ProcessBuilder(CMDcommand); //note, that you can build your command here step by step.
Process process = processBuilder.start();
String response = null;

InputStream inputStream = process.getInputStream();
BufferedReader bufferedInputStream = new BufferedReader(new InputStreamReader(inputStream));

//and then do whatever you want to do.. my example is this:
while(response=bufferedInputStream.readLine()!=null) 
    ..some code..

 catch (IOException e) 
    e.printStackTrace();