import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;
 * 线程工厂，它设置线程名称，有利于我们定位问题。
public final class NamingThreadFactory implements ThreadFactory {
    private final AtomicInteger threadNum = new AtomicInteger();
    private final String name;
     * 创建一个带名字的线程池生产工厂
    public NamingThreadFactory(String name) {
        this.name = name;
    @Override
    public Thread newThread(Runnable r) {
        Thread t = new Thread(r);
        t.setName(name + " [#" + threadNum.incrementAndGet() + "]");
        return t;