Java实现生产者与消费者模式

　　生产者不断向队列中添加数据，消费者不断从队列中获取数据。如果队列满了，则生产者不能添加数据；如果队列为空，则消费者不能获取数据。借助实现了BlockingQueue接口的LinkedBlockingQueue来模拟同步。

 1 import java.util.Random;
 2 import java.util.concurrent.BlockingQueue;
 3 import java.util.concurrent.LinkedBlockingQueue;
 4 
 5 /**
 6  * 生产者消费者模式：使用{@link java.util.concurrent.BlockingQueue}实现
 7  */
 8 public class Main{
 9     private static final int CAPACITY = 5;
10 
11     public static void main(String args[]){
12         BlockingQueue blockingQueue = new LinkedBlockingQueue<>(CAPACITY);
13 
14         Thread producer1 = new Producer("P-1", blockingQueue, CAPACITY);
15         Thread producer2 = new Producer("P-2", blockingQueue, CAPACITY);
16         Thread consumer1 = new Consumer("C1", blockingQueue, CAPACITY);
17         Thread consumer2 = new Consumer("C2", blockingQueue, CAPACITY);
18         Thread consumer3 = new Consumer("C3", blockingQueue, CAPACITY);
19 
20         producer1.start();
21         producer2.start();
22         consumer1.start();
23         consumer2.start();
24         consumer3.start();
25     }
26 
27     /**
28      * 生产者
29      */
30     public static class Producer extends Thread{
31         private BlockingQueue blockingQueue;
32         String name;
33         int maxSize;
34         int i = 0;
35 
36         public Producer(String name, BlockingQueue queue, int maxSize){
37             super(name);
38             this.name = name;
39             this.blockingQueue = queue;
40             this.maxSize = maxSize;
41         }
42 
43         @Override
44         public void run(){
45             while(true){
46                 try {
47                     blockingQueue.put(i);
48                     System.out.println("[" + name + "] Producing value : " + i);
49                     i++;
50 
51                     //暂停最多1秒
52                     Thread.sleep(new Random().nextInt(1000));
53                 } catch (InterruptedException e) {
54                     e.printStackTrace();
55                 }
56             }
57 
58         }
59     }
60 
61     /**
62      * 消费者
63      */
64     public static class Consumer extends Thread{
65         private BlockingQueue blockingQueue;
66         String name;
67         int maxSize;
68 
69         public Consumer(String name, BlockingQueue queue, int maxSize){
70             super(name);
71             this.name = name;
72             this.blockingQueue = queue;
73             this.maxSize = maxSize;
74         }
75 
76         @Override
77         public void run(){
78             while(true){
79                 try {
80                     int x = blockingQueue.take();
81                     System.out.println("[" + name + "] Consuming : " + x);
82 
83                     //暂停最多1秒
84                     Thread.sleep(new Random().nextInt(1000));
85                 } catch (InterruptedException e) {
86                     e.printStackTrace();
87                 }
88             }
89         }
90     }
91 }

　　输出结果：

　　参考资料

　　【Java】生产者消费者模式的实现