如何使用正则表达式匹配多个单词 [英] How to use regex for matching multiple words

问题描述

如何使用正则表达式来匹配Java中的多个单词?例如，同时 addAction("word")和 intentFilter("word")进行匹配吗?

How can I use regex to match multiple words in java? For example, the addAction("word") and intentFilter("word") at the same time for matching?

我尝试过:

string REGEX ="[\\baddAction\\b|\\bintentFilter\\b]\\s*\([\"]\\s*\\bword\\b\\s*[\"]\)";

有人可以告诉我这种格式有什么问题，我该如何解决?

Could someone tell me what's wrong with this format and how can I fix it?

推荐答案

您正尝试使用替代在正则表达式中列出，但您使用的是字符类("[\\ baddAction \\ b | \\ bintentFilter \\ b] ).对于字符类，其中的所有字符都是单独匹配的，而不是给定的顺序.

You are trying to use alternative lists in a regex, but instead you are using a character class ("[\\baddAction\\b|\\bintentFilter\\b]). With a character class, all characters in it are matched individually, not as a given sequence.

您了解了单词边界，还需要了解分组有效.

You learnt the word boundary, you need to also learn how grouping works.

您有一个结构:单词字符 + 带有双引号和括号的单词.

You have a structure: word characters + word in double quotes and parentheses.

因此，您需要将第一个分组，最好是使用非捕获组，并从 word 中删除一些单词边界(在指定的上下文中是多余的):

So, you need to group the first ones, and it is better done with a non-capturing group, and remove some word boundaries from the word (it is redundant in the specified context):

String rgx ="\\b(?:addAction|intentFilter)\\b\\s*\\(\"\\s*word\\s*\"\\)";
System.out.println("addAction(\"word\")".matches(rgx));
System.out.println("intentFilter(\"word\")".matches(rgx));

演示的输出

true
true

这篇关于如何使用正则表达式匹配多个单词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IT屋！