ExecutorService线程池应用

   //线程数量
    int threadNum = lists.size();
    //创建一个线程池
    ExecutorService pool = Executors.newFixedThreadPool(threadNum);
    for (int i = 0; i < threadNum; i++) {
        final List<ChannelInfo> c = lists.get(i);
        final int currentThreadNum = i;
        pool.execute(new Runnable() {
            public void run() {
                long begin = System.currentTimeMillis();
                try{
                    //逻辑编写
                    beanList.addAll(batchBeansByInfos(c));
                    //业务逻辑结束
                }catch (Exception e){
                    e.printStackTrace();
                }finally {
                    long end = System.currentTimeMillis();
                    System.out.println("线程"+currentThreadNum+"导出耗时:" + (end - begin)+",数据条数:"+beanList.size());
                }
            }
        });
    }
    pool.shutdown();
    while(true){
        if(pool.isTerminated()){
            System.out.println("所有的子线程都结束了！");
            break;
        }
        Thread.sleep(1000);
    }

} catch (Exception e) {
    e.printStackTrace();
}finally{
    System.out.println("导出结束");
}