使用Lock锁生产者消费者模式

 package com.java.concurrent;

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

 /**
  * 生产者消费者模式
  * @author fliay
  *
  */
 public class TestProductorAndConsumerByLock {

     public static void main(String[] args) {
         ClerkByLock c = new ClerkByLock();
         ProductorByLock pro = new ProductorByLock(c);
         ConsumerByLock con = new ConsumerByLock(c);
         new Thread(pro,"生产者A").start();
         new Thread(con,"消费者B").start();
         new Thread(pro,"生产者C").start();
         new Thread(con,"消费者D").start();
     }

 }

 class  ClerkByLock{
     //初始化产品
     private int product = ;
     //定义一个Lock锁对象
     private Lock lock = new ReentrantLock();
     //创建condition对象
     private Condition condition = lock.newCondition();

     //进货
     public  void get(){
         lock.lock();

         try{
             while(product>=){
                 System.out.println("产品已满！");
                 try {
                     //使用condition进行线程等待
                     condition.await();
                 } catch (InterruptedException e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                 }
             }
             condition.signalAll();
             System.out.println(Thread.currentThread().getName()+":"+ ++product);
         }finally{
             //始终会解锁
             lock.unlock();
         }

     }

     //卖货
     public  void sale(){
         lock.lock();
         try{

             while(product<=){
                 System.out.println("补货中！");
                 try {
                     condition.await();
                 } catch (InterruptedException e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                 }
             }
             condition.signalAll();
             System.out.println(Thread.currentThread().getName()+":"+ --product);
         }finally{
             lock.unlock();
         }

     }
 }

 class ProductorByLock implements Runnable{

     private ClerkByLock clerk;

     public ProductorByLock(ClerkByLock clerk) {
         this.clerk = clerk;
     }

     public void run() {
         for(int i=;i<;i++){
             clerk.get();
         }
     }
 }

 class ConsumerByLock implements Runnable{

     private ClerkByLock clerk;

     public ConsumerByLock(ClerkByLock clerk) {
         this.clerk = clerk;
     }

     public void run() {
         for(int i=;i<;i++){
             clerk.sale();
         }
     }
 }

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