http的异步请求
需要用到的包(包版本应该可能不同):
httpcore-4.1.4.jar
httpsayncclient-4.0-alpha3.jar
httpcore-nio-4.2-alpha3.jar
/** * 异步http请求 * @author Old Zhang * */ public class AsyncClientHttpExchange { public static void main(String[] args) throws Exception { sendUrl(); } public static void sendUrl() throws Exception { String str="hello,world"; String url="https://www.baidu.com"+"?str:"+str; //String response = getHttpResponse(url); CloseableHttpAsyncClient httpclient = HttpAsyncClients.createDefault(); httpclient.start(); final CountDownLatch latch = new CountDownLatch(1); final HttpGet request = new HttpGet("https://www.baidu.com"); System.out.println(" caller thread id is : " + Thread.currentThread().getId()); httpclient.execute(request, new FutureCallback<HttpResponse>() { public void completed(final HttpResponse response) { latch.countDown(); System.out.println(" callback thread id is : " + Thread.currentThread().getId()); System.out.println(request.getRequestLine() + "->" + response.getStatusLine()); try { String content = EntityUtils.toString(response.getEntity(), "UTF-8"); System.out.println(" response content is : " + content); } catch (IOException e) { e.printStackTrace(); } } public void failed(final Exception ex) { latch.countDown(); System.out.println(request.getRequestLine() + "->" + ex); System.out.println(" callback thread id is : " + Thread.currentThread().getId()); } public void cancelled() { latch.countDown(); System.out.println(request.getRequestLine() + " cancelled"); System.out.println(" callback thread id is : " + Thread.currentThread().getId()); } }); try { latch.await(); } catch (InterruptedException e) { e.printStackTrace(); } try { httpclient.close(); } catch (IOException ignore) { } } }