web 性能压测工具类

import okhttp3.Call;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class TPS_TEST {
    public static void main(String[] args) throws InterruptedException {
        ExecutorService executorServicePool = Executors.newFixedThreadPool(200);
        final int size = 100;
        final CountDownLatch cdl = new CountDownLatch(size);
        long begin = System.currentTimeMillis();
        for (int i = 0; i < size; i++) {
            executorServicePool.execute(new Runnable() {
                public void run() {
                    try {
                        //压测逻辑，可以调用具体的service
                        String url = "https://time.geekbang.org/";
                        //每次都建立连接
                        OkHttpClient okHttpClient = new OkHttpClient();
                        final Request request = new Request.Builder()
                                .url(url)
                                .build();
                        final Call call = okHttpClient.newCall(request);
                        Response response = call.execute();
                        cdl.countDown();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
        }
        cdl.await();//等待所有任务处理完  
        long time = System.currentTimeMillis() - begin;
        System.out.println("总耗时：" + (double) time / 1000 + " s");
        System.out.println("平均响应时间:" + ((double) time) / size + " ms");
        System.out.println("TPS:" + (double) size / ((double) time / 1000));
        //P95,响应时间排序，取第95个的响应时间
    }
}