httpclient多线程

HTTPClient是一个开源的HTTP通信框架，支持多线程并发请求。要在多线程环境下使用HTTPClient，可以使用多线程池来管理HTTP请求线程。下面是使用HTTPClient进行多线程请求的一个简单示例：

import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class HttpThreadDemo {

    public static void main(String[] args) {

        // 创建HttpClient对象
        HttpClient httpClient = HttpClientBuilder.create().build();

        // 创建线程池
        ExecutorService executorService = Executors.newFixedThreadPool(10);

        // 创建HttpGet请求
        HttpGet httpGet = new HttpGet("http://www.baidu.com");

        // 提交多个请求
        for (int i = 0; i < 10; i++) {
            executorService.submit(new HttpTask(httpClient, httpGet));
        }

        // 关闭线程池
        executorService.shutdown();
    }

    static class HttpTask implements Runnable {

        private HttpClient httpClient;
        private HttpGet httpGet;

        public HttpTask(HttpClient httpClient, HttpGet httpGet) {
            this.httpClient = httpClient;
            this.httpGet = httpGet;
        }

        @Override
        public void run() {
            try {
                // 执行请求
                httpClient.execute(httpGet);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

在上面的示例中，我们创建了一个线程池，然后提交了10个HTTP请求任务。每个任务都是一个独立的线程，通过HttpClient对象执行一个HttpGet请求。最后，我们关闭了线程池。