Sender.setup方法无法传入自定义ExecutorService

[wendal]

public static ExecutorService setup(ExecutorService es) {
        if (es != null)
            return es;
        if (es == null)
            es = Executors.newFixedThreadPool(64);
        Sender.es = es;
        return es;
    }

代码一目了然... 第一个if应该是 if (Sender.es != null)

[wendal]

refer: https://nutz.cn/yvr/t/qp17hcth1cjper4rqh74m902no