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法律研究Java 9 中的 Http/2 客戶端是什麼？
Http/2 客戶端 API 已在 Java 9 中引入。與Http/1.1 相比，它在效能上有了更多改進，還支援伺服器端推送事件。這使得網站瀏覽起來高效快捷。Http/2 客戶端 是一個名為jdk.incubator.httpclient 的孵化器模組，這意味著所有功能尚未最終確定，在未來版本的 java 中可能會進行新的更改。它匯出了包含所有公共 API 的jdk.incubator.http 包。
要使用Http/2 客戶端，我們需要使用孵化器模組，只需使用“-add-modules”命令將httpclient 模組傳遞到 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
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on Apache and CentOS Linux powered HTTP servers. Thanks for using Apache and CentOS!
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