notepad ++中的REGEX仅显示包含某些文本的行？

Question

I have a huge text file that has so much unneeded text and I want to just filter out the bits of text that interest me. The format for what I want is in the example below:

{\"animal\":\"crocodile\",\"class\":\"reptilia\"}

There are hundreds of different animals and of course classes.

How can I use regex in notepad++ to show only these lines of text in the whole document?

Answer 1

EDIT after last comment, you can try

Find what

(\\"(animal|class)\\":\\".*?\\")?\K.*?(?=\\"(animal|class)\\":)

Replace with

\n

• Regular expression
• . matches newline

Replace all

EDIT added double backslash \\\\ to match \\ in the document.

following regex

\\"(animal|class)\\"\s*:

will match any of animal or class between " followed by 0 or more spaces followed by :