当jar需要外部文件时，无法使用Desktop.getDesktop().open(new File("C:/path/firefox.jar");)；执行jar文件

import java.io.File;
import java.io.IOException;

public class ExecuteJarWithExternalFile {
    public static void main(String[] args) {
        String jarFilePath = "C:/path/yourjarfile.jar";
        String externalFilePath = "C:/path/yourfile.txt";

        ProcessBuilder processBuilder = new ProcessBuilder("java", "-jar", jarFilePath);
        processBuilder.directory(new File(jarFilePath).getParentFile());

        try {
            Process process = processBuilder.start();
            process.waitFor();
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }
}