写一个 web 性能压测工具

import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
public class BaiduTest {
    public static Map<String,Long> hashMap = new ConcurrentHashMap<>();
    public static void main(String[] args) {
        long start = System.currentTimeMillis();
        ExecutorService fixedThreadPool = Executors.newFixedThreadPool(10);
        for (int i = 0; i < 100; i++) {
            fixedThreadPool.execute(new Runnable() {
                @Override
                public void run() {
                    long startTIme = System.currentTimeMillis();
                    String str = HttpClientUtil.httpGet("http://www.baidu.com");
                    long endTIme = System.currentTimeMillis();
                    long useTime = endTIme-startTIme;
                    System.out.println("useTime"+useTime);
                    hashMap.put(UUID.randomUUID().toString(),useTime);
                }
            });
        }
        fixedThreadPool.shutdown();
        while(true){
            if(fixedThreadPool.isTerminated()){
                System.out.println((System.currentTimeMillis() - start) + "ms");
                System.out.println("所有的子线程都结束了！");
                AtomicReference<Long> allTIme = new AtomicReference<>(0l);
                List<Long> nineFiveTIme = new ArrayList<>();
                AtomicInteger i = new AtomicInteger();
                hashMap.forEach((k,v)->{
                    allTIme.updateAndGet(v1 -> v1 + v);
                    nineFiveTIme.add(v);
                });
                nineFiveTIme.sort(Comparator.comparingLong(Long::longValue));
                System.out.println("平均响应时间："+allTIme.get()/100+"ms");
                System.out.println("95%响应时间："+nineFiveTIme.get(95)+"ms");
                break;
            }
        }
    }
}