android java正则表达式命名组

Question

我想用

matcher.group("login");

在 android 8+ on eclipse 中，但似乎不存在 Matcher.group(String) 。您有(内置的)解决方案吗？

Answer 1

安卓Pattern类实现是由ICU提供的，准确的说是ICU4C .

The regular expression implementation used in Android is provided by ICU. The notation for the regular expressions is mostly a superset of those used in other Java language implementations. This means that existing applications will normally work as expected, but in rare cases Android may accept a regular expression that is not accepted by other implementations.

ICU4C 目前不支持命名捕获组。您必须求助于编号的捕获组。

ICU does not support named capture groups. http://bugs.icu-project.org/trac/ticket/5312

如果您确实需要该功能，您需要自己编写一个包装器并解析表达式以提供命名捕获组功能。