HttpURLConnection URI不能為null

Question

我想向網站發出GET請求，但我得到的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.

為什么我得到的URI can't be null ？

PS：我正在使用jdk10

Answer 1

您的代碼運行正常。

我用這個測試了代碼：

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

可能是您正在訪問的網址不是GET類型。 檢查一下。