自定义线程工厂

JDK线程 池：Executors.newFixedThreadPool ， Executors.newSingleThreadExecutor，由一个 ThreadFactory来创建新的线程，默认情况下为 Executors.defaultThreadFactory(),ThreadFactory接口

    public static void main(String args[]){    ExecutorService es = Executors.newFixedThreadPool(5, new MyThreadFactory("threadName"));    }