使用HttpClient可配置三种超时时间:RequestTimeOut(获取链接超时时间) 、connectTimeOut(建立链接超时时间)、SocketTimeOut(获取数据超时时间)。配置这三种超时时间，需要用到HttpClient的RequestConfig类中的custom()方法，该方法返回值为实例化内部类的Builder(配置器)。程序3-18是HttpClient进行超时设置的代码案例。
//程序3-18 public class HttpClientTimeout { public static void main(String[] args) throws Exception { //初始化httpClient HttpClient httpClient = HttpClients.createDefault(); //Get请求(Post方法相似) HttpGet httpGet=new HttpGet("https://searchcustomerexperience.techtarget.com/info/news"); //设置请求和传输超时时间 RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2*1000).setConnectTimeout(2*1000).setConnectionRequestTimeout(10*1000).build(); //httpGet信息配置 httpGet.setConfig(requestConfig); HttpResponse response = null; try { //执行请求 response = httpClient.execute(httpGet); }catch (Exception e){ e.printStackTrace(); } //获取结果 String result = EntityUtils.toString(response.getEntity(),"utf-8"); System.out.println(result); } }