package src.CommandExec;

import java.io.ByteArrayOutputStream;

import java.io.InputStream;

import java.lang.reflect.Method;

import java.util.Map;

// 使用 ProcessImpl 进行命令执行

public class ProcessImplExec {

public static void main(String[] args) throws Exception{

String[] cmds = new String[]{"whoami"};

Class clazz = Class.forName("java.lang.ProcessImpl");

Method method = clazz.getDeclaredMethod("start", String[].class, Map.class, String.class,

ProcessBuilder.Redirect[].class, boolean.class);

method.setAccessible(true);

Process e = (Process) method.invoke(null, cmds, null, ".", null, true);

InputStream inputStream = e.getInputStream();

byte[] cache = new byte[1024];

int readLen = 0;

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

while ((readLen = inputStream.read(cache)) != -1){

byteArrayOutputStream.write(cache, 0, readLen);

}

System.out.println(byteArrayOutputStream);

}

}