简易 web 性能工具

package other;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.*;
/**
 *
 * 用你熟悉的编程语言写一个 web 性能压测工具，输入参数：URL，请求总次数，并发数。输出参数：
 * 平均响应时间，95% 响应时间。用这个测试工具以 10 并发、100 次请求压测 www.baidu.com。
 *
 */
public class WebTest {
    /**
     * 相应时间集合
     */
    private static List<Long> responseCostList = new ArrayList<>();
    public  void httpTest(String url,int requestCount,int concurrentCount){
        ExecutorService executor  = new ThreadPoolExecutor(concurrentCount,
                concurrentCount,1000,
                TimeUnit.SECONDS,
                new ArrayBlockingQueue<>(requestCount));
        int loopCount = requestCount / concurrentCount;
        for (int i = 0; i < loopCount; i++) {
            for (int j = 0; j < concurrentCount; j++) {
                Task t = new Task(url);
                Future<Long> result = executor.submit(t);
                try {
                    responseCostList.add(result.get());
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } catch (ExecutionException e) {
                    e.printStackTrace();
                }
            }
        }
        Collections.sort(responseCostList);
        Long sum = responseCostList.stream().mapToLong(value -> value).sum();
        System.out.println("平均响应时间:" + (sum/requestCount) +" ms");
        Long c95 = responseCostList.get(95);
        System.out.println("95%响应时间:" + c95 +" ms");
        executor.shutdown();
    }
    public static void main(String[] args) {
        WebTest test = new WebTest();
        test.httpTest("http://www.baidu.com",100,10);
    }
    class Task implements Callable<Long>{
        private String url ;
        public Task(String url){
            this.url = url;
        }
        @Override
        public Long call(){
            long current = System.currentTimeMillis();
            HttpClientUtil.get(url,10000);
            long finish = System.currentTimeMillis();
            return finish-current;
        }
    }
}