生产者消费者模式-优快云博客

本文介绍了一个基于Java的生产者消费者模式实现案例，通过Lock和Condition实现了线程间的同步与通信，确保了数据生产和消费的正确性。

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package 生产者消费者;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * Lock 是不变的   所以使用 final
 * */
class works{
    private String name;
    private int count=1;
    private boolean flag;
    final Lock lock=new ReentrantLock();//获取锁的对象

    final Condition zuo=lock.newCondition();//建立书的监听机制

    final Condition mai=lock.newCondition();

    public void set(String name){
        lock.lock();//上锁
        try{
            while(flag)//true 如果有馒头
                try {
                    zuo.await();//做的人等待
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            if(count>1000){
                System.exit(0);
            }

            this.name=count+name;
            count++;
            System.out.println(Thread.currentThread().getName()+"...生产者"+this.name);
            flag=true;

            mai.signal();//唤醒买线程
        }
        finally{
            lock.unlock();//释放锁
        }

    }
    public void get(){
        lock.lock();
        try{
        while(!flag)//!true==>false
            try {
                mai.await();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        System.out.println(Thread.currentThread().getName()+"<<<<<<<<<消费者"+this.name);
        flag=false;
        zuo.signal();
        }finally{
            lock.unlock();
        }
    }
}

class zuo implements Runnable{
    private works w;
    zuo(works w){
        this.w=w;
    }
    public void run() {
        while(true)
            w.set("馒头");
    }
}
class mai implements Runnable{
    private works w;
    mai(works w){
        this.w=w;
    }
    public void run() {
        while(true)
            w.get();
    }

}
public class Dome {
public static void main(String[] args) {
        works w=new works();

        zuo z=new zuo(w);
        mai m=new mai(w);

        Thread t1=new Thread(z);
        t1.setName("线程1");
        Thread t2=new Thread(m);
        t2.setName("线程2");
        t1.start();
        t2.start();
    }
}