阻塞队列实现的生产者/消费者模式

最新推荐文章于 2025-02-25 11:12:26 发布

原创最新推荐文章于 2025-02-25 11:12:26 发布 · 372 阅读

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本文介绍了一个基于Java实现的多线程售票系统案例。该系统通过一个共享的阻塞队列来同步多个售票点线程与票务生产者线程之间的交互。文章详细展示了如何使用synchronized关键字和wait/notify机制确保线程安全。

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public class MyThread {
   static int i;
   public static void main(String[] args) {
       TickOffice t = new TickOffice();
       Thread t1 = new Thread(new Produce(t));
       t1.setName("售票点1");
       t1.start();
       Thread t2 = new Thread(new Consumer(t));
       t2.setName("售票点2");
       t2.start();
       Thread t3 = new Thread(new Consumer(t));
       t3.setName("售票点3");
       t3.start();
       Thread t4 = new Thread(new Consumer(t));
       t4.setName("售票点4");
       t4.start();
   }
}
class TickOffice {
   private int ticket = 0;
   private ArrayBlockingQueue<Integer> queue = new ArrayBlockingQueue<>(15); //存放5张票的阻塞队列
   public synchronized void add(){
       if(this.queue.size()>=15){
           System.out.println("仓库已满");
           try {
               this.wait();
           } catch (InterruptedException e) {
               e.printStackTrace();
           }
       }else {
           ticket += 1;
           try {
               queue.put(ticket);
               Thread.sleep(100);
           } catch (InterruptedException e) {
               e.printStackTrace();
           }
           System.out.println("产生第"+ticket+"张票");
           this.notifyAll();
       }
   }
   public synchronized void get(){
       if(this.queue.size()<=0){
           System.out.println("缺票等待中");
           try {
               this.wait();
           } catch (InterruptedException e) {
               e.printStackTrace();
           }
       }else {
           System.out.println(Thread.currentThread().getName()+"售出第"+queue.poll()+"张票");
           this.notifyAll();
       }
   }
}
class Produce implements Runnable{
   private TickOffice off;
   public Produce(TickOffice off) {
       this.off = off;
   }
   @Override
   public void run() {
       System.out.println("开张");
       while (true) {

           off.add();
       }
   }

}

class Consumer implements Runnable{
   private TickOffice off;
   public Consumer(TickOffice off) {
       this.off = off;
   }
   @Override
   public void run() {
       System.out.println("消费者开始取走产品");
       while(true){

           off.get();
       }
   }

}