Java实现手写线程池实例并测试详解

package XIAOWEI;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.stream.IntStream;

public class ThreadPool {
    private static final int WorkQueueSIZE = 5;
    private BlockingQueue<Runnable> workQueue;
    private List<WorkThread> workThreads=new ArrayList<WorkThread>();

    /**
     * @author xiaowei
     * @param poolSize
     * @param workQueue
     * 构造方法，传线程池的大小和阻塞队列
     */
    public ThreadPool(int poolSize,BlockingQueue<Runnable> workQueue) {
        this.workQueue = workQueue;
        IntStream.range(0,poolSize).forEach((i)->{
            WorkThread workThread=new WorkThread();
            workThread.start();
            workThreads.add(workThread);
        });
    }

    /**
     * @param poolSize
     * 在ThreadPool的构造方法中传入线程池的大小
     */
    public ThreadPool(int poolSize){
        this(poolSize,new LinkedBlockingQueue<>(WorkQueueSIZE));
    }

    /**
     * @param task
     * 通过线程池执行任务
     */
    public void extcute(Runnable task){
        try {
            workQueue.put(task);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
    public void shutdown(){
        if(workThreads!=null && workThreads.size()>0){
            workThreads.stream().forEach((workThread) -> {
                workThread.interrupt();
            });
        }
    }
    /**
     * 内部类 源源不断的消耗workQueue中的任务
     */
    class WorkThread extends Thread {
        @Override
        public void run() {
            Thread currentThread = Thread.currentThread();
            // 死循环 不断一直消费队列中的任务 直到任务被消费完全
            while (true) {
                try {
                    if (currentThread.isInterrupted()) {
                        break;
                    }
                    Runnable workTasK = workQueue.take();
                    workTasK.run();
                } catch (InterruptedException e) {
                    currentThread.interrupt();
                }
            }
        }
    }
}

package XIAOWEI;

import java.util.stream.IntStream;

public class ThreadPoolTest {
    public static void main(String[] args) {
        ThreadPool threadPool = new ThreadPool(5);
        IntStream.range(0,10).forEach((i)->{
            threadPool.extcute(()->{
                System.out.println(Thread.currentThread().getName()+"2023一起加油");
            });
        });
        threadPool.shutdown();
    }
}