java - HttpClient 执行两次后停止在循环中执行相同的 HttpGet 方法

Question

这是我的主要方法:

public static void main(String[] args) {

    BasicCookieStore cookieStore = null;
    HttpResponse httpResponse = null;
    HttpClient httpClient = HttpClients.createDefault();
    while (true) {
        HttpUriRequest request = new HttpGet("http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/org/apache/http/impl/client/HttpClientBuilder.html");
        try {
            httpResponse = httpClient.execute(request);
            System.out.println(httpResponse.getStatusLine().getStatusCode());
        } catch (Exception e) {
            System.out.println(httpResponse.getStatusLine().getStatusCode());
            e.printStackTrace();
        }
    }
}

执行 2 次后 HttpClient 停止执行相同的 HttpGet。虽然，我在循环中实例化了一个新的 HttpClient，但它不会停止。我想知道是否有某种策略阻止 HttpClient 执行相同的 HttpGet 方法超过 2 次？
谁能帮帮我，我将不胜感激!

Answer 1

客户端正在使用连接池来访问 Web 服务器。见 HttpClientBuilder#build() .创建默认 httpclient 并且没有指定任何内容时，它会创建一个大小为 2 的池。因此，在使用 2 后，它会无限期地等待尝试从池中获取第三个连接。

您必须读取响应或关闭连接，以便重新使用客户端对象。

查看更新的代码示例:

public static void main(String[] args) {

    BasicCookieStore cookieStore = null;
    HttpResponse httpResponse = null;
    HttpClient httpClient = HttpClients.createDefault();
    while (true) {
        HttpUriRequest request = new HttpGet("http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/org/apache/http/impl/client/HttpClientBuilder.html");
        try {
            httpResponse = httpClient.execute(request);
            httpResponse.getEntity().getContent().close();
            System.out.println(httpResponse.getStatusLine().getStatusCode());
        } catch (Exception e) {
            System.out.println(httpResponse.getStatusLine().getStatusCode());
            e.printStackTrace();
        }
    }
}