正则表达式仅提取字符串之后和空格之前的文本

本文介绍了正则表达式仅提取字符串之后和空格之前的文本的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想在给定字符串后匹配文本.在这种情况下，以BookTitle"开头但在第一个空格之前的行的文本:

I want to match text after given string. In this case, the text for lines starting with "BookTitle" but before first space:

BookTitle:HarryPotter JK Rowling BookTitle:HungerGames Suzanne Collins Author:StephenieMeyer BookTitle:Twilight

所需的输出是:

HarryPotter HungerGames

我试过:"^BookTitle(.*)" 但它给了我匹配 BookTitle: 在行中间的地方，以及空格之后的所有东西.有人帮忙吗?

I tried: "^BookTitle(.*)" but it's giving me matches where BookTitle: is in middle of line, and also all the stuff after white space. Anyone help?

推荐答案

你可以在你的模式中使用 positive lookbehind.

you can have positive lookbehind in your pattern.

(?<=BookTitle:).*?(?=\s)

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