使用java从奇怪但有效的url获取域 [英] Get domain from strange yet valid url with java

问题描述

我需要从这个 url 获取主机

I need to get host from this url

android-app://com.google.android.googlequicksearchbox?Pub_id={siteID} 

java.net.URL 和 java.net.URI 无法处理.

推荐答案

问题在于 { 和 } 字符对 URI 无效.看起来像是在创建 URI 时未正确解析的占位符.

The problem is in { and } characters which are not valid for URI. Looks like a placeholder that wasn't resolved correctly when creating a URI.

你可以使用String.replaceAll()去掉这两个字符:

You can use String.replaceAll() to get rid of these two characters:

String value = "android-app://com.google.android.googlequicksearchbox?Pub_id={siteID}";
URI uri = URI.create(value.replaceAll("[{}]", ""));
System.out.println(uri.getHost()); // com.google.android.googlequicksearchbox

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