java - HttpURLConnection URI 不能为空

Question

我想向网站发出 GET 请求，但我得到URI can't be null。

String url = "https://valid_url.com";

HttpURLConnection connection = (HttpURLConnection)(new URL(url)).openConnection();

connection.setRequestMethod("GET");

connection.connect(); //-> java.lang.IllegalArgumentException: URI can't be null.

为什么我得到URI can't be null？

PS:我使用的是jdk10

Answer 1

您的代码运行良好。

我用这个测试了代码:

String url = "https://google.com";
HttpURLConnection connection = (HttpURLConnection)(new URL(url)).openConnection();
connection.setRequestMethod("GET");
connection.connect();

可能您访问的网址不是GET类型。检查一下。