问题描述
我认为这是一个简单的问题，但我无法找到一个简单的解决方案（比如，少于10行代码:)：
I think this is an easy question, but I am not able to find a simple solution (say, less than 10 lines of code :)
我有一个 String ，例如thisIsMyString，我需要将其转换为 String [] { this，Is，My，String} 。
I have a String such as "thisIsMyString" and I need to convert it to a String[] {"this", "Is", "My", "String"}.
请注意第一个字母不是大写字母。
Please notice the first letter is not uppercase.
推荐答案
你可以使用零宽度正向前瞻的正则表达式 - 它找到大写字母但不包括它们分隔符：
You may use a regexp with zero-width positive lookahead - it finds uppercase letters but doesn't include them into delimiter:
String s = "thisIsMyString";
String[] r = s.split("(?=\\p{Upper})");
Y（？= X）匹配 Y 后跟 X ，但不包括 X 成比赛。所以（？= \\\\ {Upper}）匹配一个空序列后跟一个大写字母， split 将其用作分隔符。
Y(?=X) matches Y followed by X, but doesn't include X into match. So (?=\\p{Upper}) matches an empty sequence followed by a uppercase letter, and split uses it as a delimiter.
参见获取有关Java regexp语法的更多信息。
See javadoc for more info on Java regexp syntax.
编辑：顺便说一句，它也不适用于thisIsMyÜberString。对于非ASCII大写字母，您需要一个Unicode大写字符类而不是POSIX一个：
By the way, it doesn't work with thisIsMyÜberString too. For non-ASCII uppercase letters you need a Unicode uppercase character class instead of POSIX one:
String[] r = s.split("(?=\\p{Lu})");
这篇关于Java：找到大写字母时拆分字符串的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！