从 Java 中的相对 URL 构建绝对 URL [英] Building an absolute URL from a relative URL in Java

问题描述

我在从相对 URL 构建绝对 URL 时遇到了麻烦，而无需求助于 Stringhackery...

I'm having trouble building an absolute URL from a relative URL without resorting to String hackery...

给定

http://localhost:8080/myWebApp/someServlet

方法内部:

   public void handleRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}

最正确"的构建方式是什么:

What's the most "correct" way of building :

http://localhost:8080/myWebApp/someImage.jpg

(注意，必须是绝对的，不是相对的)

(Note, must be absolute, not relative)

目前，我是通过构建字符串来实现的，但一定有更好的方法.

Currently, I'm doing it through building the string, but there MUST be a better way.

我查看了新 URI/URL 的各种组合，最后得到了

I've looked at various combinations of new URI / URL, and I end up with

http://localhost:8080/someImage.jpg

非常感谢帮助

推荐答案

Using java.net.URL

Using java.net.URL

 URL baseUrl = new URL("http://www.google.com/someFolder/");
 URL url = new URL(baseUrl, "../test.html");

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