高并发中令牌桶生成工具类

首先导入工具包：

<!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>29.0-jre</version>
</dependency>

工具类：

public class TokenDemo {
    RateLimiter rateLimiter = RateLimiter.create(10);//设定qps

    public void doRequest() {
        if (rateLimiter.tryAcquire()) {
            System.out.println(Thread.currentThread().getName() + "->请求成功");
        } else {
            System.out.println(Thread.currentThread().getName() + "->请求失败");
        }
    }

    public static void main(String[] args) throws IOException {
        final TokenDemo tokenDemo = new TokenDemo();
        CountDownLatch countDownLatch = new CountDownLatch(1);
        final Random random = new Random(10);
        for (int i = 0; i < 20; i++) {
            new Thread(() -> {
                try {
                    countDownLatch.await();
                    Thread.sleep(random.nextInt(1000));
                    tokenDemo.doRequest();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }, "t" + i).start();
        }
        countDownLatch.countDown();
        System.in.read();

    }
}