正则表达式仅提取字符串之后和空格之前的文本 [英] Regex to extract only text after string and before space

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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