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法律研究Java 9 中的 Http/2 客户端是什么？
Http/2 客户端 API 已在 Java 9 中引入。与Http/1.1 相比，它在性能上有了更多改进，还支持服务器端推送事件。这使得网站浏览起来高效快捷。Http/2 客户端 是一个名为jdk.incubator.httpclient 的孵化器模块，这意味着所有功能尚未最终确定，在未来版本的 java 中可能会进行新的更改。它导出了包含所有公共 API 的jdk.incubator.http 包。
要使用Http/2 客户端，我们需要使用孵化器模块，只需使用“-add-modules”命令将httpclient 模块传递到 JShell，如下所示
C:\>jshell -v --add-modules jdk.incubator.httpclient | Welcome to JShell -- Version 9.0.4 | For an introduction type: /help intro
示例
jshell> import jdk.incubator.http.*;
jshell> HttpClient httpClient = HttpClient.newHttpClient();
httpClient ==> jdk.incubator.http.HttpClientImpl@534df152
| created variable httpClient : HttpClient
jshell> HttpRequest httpRequest = HttpRequest.newBuilder().uri(new URI("https: //www.google.com")).GET().build();
httpRequest ==> https://www.google.com GET
| created variable httpRequest : HttpRequest
jshell> HttpResponse httpResponse = httpClient.send(httpRequest, HttpResponse.BodyHandler.asString());
httpResponse ==> jdk.incubator.http.HttpResponseImpl@609cd4d8
| created variable httpResponse : HttpResponse
jshell> System.out.println(httpResponse.statusCode());
403
jshell> System.out.println(httpResponse.body());
Apache HTTP Server Test Page powered by CentOS
Testing 123..
This page is used to test the proper operation of the Apache HTTP server after it has been insta
lled. If you can read this page it means that this site is working properly. Thi
s server is powered by CentOS.
The website you just visited is either experiencing problems or is undergoing routine maintenance.
If you would like to let the administrators of this website know that you've seen this page instead of the page you expected, you should send them e-mail. In general, mail sent to the name "webmast
er" and directed to the website's domain should reach the appropriate person.For example, if you experienced problems while visiting www.example.com, you should send e-mail to "webmaster@example
.com".
Are you the Administrator?
You should add your website content to the directory /var/www/html/.
To prevent this page from ever being used, follow the instructions in the file /etc/httpd/conf.d/welcome.conf.
Promoting Apache and CentOS
You are free to use the images below
on Apache and CentOS Linux powered HTTP servers. Thanks for using Apache and CentOS!
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