并发模拟的四种方式
码农突围
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·
2022-01-19 14:53
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一、Postman
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("test")
public class TestConrtoller {
@GetMapping("demo")
public String testDemo() {
return "result~";
}
}
进入下载页面 选择适合自己电脑的版本
httpd.exe -k install
httpd.exe -k start-c: 并发数
public CountDownLatch(int count) { };public void await() throws InterruptedException { };
public boolean await(long timeout, TimeUnit unit) throws InterruptedException { };
public void countDown() { };import lombok.extern.slf4j.Slf4j;
import java.util.concurrent.*;
@Slf4j
public class CuncurrencyTest {
public static int clientTotal = 5000;
public static int threadTotal = 200;
public static int count = 0;
public static void main(String[] args) throws InterruptedException {
ExecutorService executorService = Executors.newCachedThreadPool();
final Semaphore semaphore = new Semaphore(threadTotal);
final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);
for (int i = 0; i < clientTotal; i++) {
executorService.execute(() -> {
try {
semaphore.acquire();
add();
semaphore.release();
} catch (InterruptedException e) {
e.printStackTrace();
log.error("exception",e);
}
countDownLatch.countDown();
});
}
countDownLatch.await();
executorService.shutdown();
log.info("count:{}",count);
}
private static void add() {
count++;
}
}
上面是对代码的并发模拟的简单形式，值得注意的是，这里提到的两个类不是专门做并发模拟，它们的用途很广泛，等之后更新Java网络编程的东西的时候，还会详细介绍它们。
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