生产者消费者模型

最新推荐文章于 2025-05-26 14:52:34 发布

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本文介绍了一个基于Java的生产者消费者模式实现，通过使用synchronized关键字和wait/notify方法来协调生产者和消费者线程，确保了线程安全的数据交换。在六个银行对象组成的环形缓冲区中，生产者线程负责生成随机数据并存储，而消费者线程则消费这些数据。

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Random;

@SuppressWarnings("all")
/**
 * 描述:
 *
 * @Author (fei)
 * @Date $(DATE)
 */
class Producer1 implements Runnable{
    private HashMap<Integer,Bank6> hashMap;

    public Producer1(HashMap<Integer,Bank6> hashMap) {
        this.hashMap = hashMap;
    }

    @Override
    public void run() {
        while(true) {
            producer1();
        }
    }

    public void producer1() {
        for(int i =1;i<=6;i++) {
            if(i == 6) {
                i = 1;
            }
            Bank6 bank6 = hashMap.get(i);
            synchronized (bank6) {
                try {
                    if(bank6.getIndex() == 1) {
                        System.out.println("producer wait...");
                        bank6.wait();
                        i++;
                        continue;
                    }
                    /*while (bank6.getIndex() == 1) {
                        System.out.println("producer"+ i +" wait...");
                        bank6.wait();
                    }*/
                    Random random = new Random();
                    int n = random.nextInt(10);
                    bank6.setData(n);
                    //打印数据
                    System.out.println("produce data is :" + bank6.getData());
                    //index + 1
                    bank6.setIndex(bank6.getIndex() + 1);
                    //通知消费者
                    bank6.notify();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

class Consumer1 implements Runnable{
    private HashMap<Integer,Bank6> hashMap;

    public Consumer1(HashMap<Integer,Bank6> hashMap) {
        this.hashMap = hashMap;
    }

    @Override
    public void run() {
        while(true) {
            consumer1();
        }
    }

    public void consumer1() {
        for(int i =1;i<=6;i++) {
            if(i == 6) {
                i = 1;
            }
            Bank6 bank6 = hashMap.get(i);
            synchronized (bank6) {
                try {
                    if(bank6.isEmpty()) {
                        System.out.println("consumer wait...");
                        bank6.wait();
                        i++;
                        continue;
                    }

                    //print data
                    System.out.println("consumer consum: " + bank6.getData());
                    //index - 1
                    bank6.setIndex(bank6.getIndex()-1);
                    //inform producer
                    bank6.notify();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }


}

class Bank6 {
    private int data;

    private String name;

    private int index;

    public Bank6(String name) {
        this.name = name;
    }

    public boolean isEmpty() {
        return this.index == 0;
    }

    public int getData() {
        return data;
    }

    public void setData(int data) {
        this.data = data;
    }

    public int getIndex() {
        return index;
    }

    public void setIndex(int index) {
        this.index = index;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

public class ProCon6Bank {
    public static void main(String[] args) {
        HashMap<Integer,Bank6> hashMap = new HashMap<>();
        for(int i=1;i<=6;i++) {
            Bank6 bank6 = new Bank6("bank"+i);
            hashMap.put(i,bank6);
            System.out.println(hashMap.get(i).getName());
        }
        Thread producer1 = new Thread(new Producer1(hashMap));
        Thread consumer1 = new Thread(new Consumer1(hashMap));

        producer1.start();
        consumer1.start();
    }
}