Remove style tag from a text file with regex

Question

I need to remove style tags from text file..

I tried the following code

String text = readFile("E:/textwithstyletags.txt");
retVal = text.replaceAll("<style(.+?)</style>", "");

it works when the text file has style tags without new lines i.e. <style> body{ color:red; } </style>

It doesn't work when there are new lines, like this

<style> 
body{ 
color:red; 
} 
</style>

Possibly related? [Match multiline text using regular expression](http://stackoverflow.com/questions/3651725/match-multiline-text-using-regular-expression) — PakkuDon, Apr 27 '15 at 06:05

karthik manchala · Accepted Answer · 2015-04-27T06:11:17.757

8

You can use [\s\S] in place of . in your regex

i.e:

retVal = text.replaceAll("<style([\\s\\S]+?)</style>", "");

edited Apr 27 '15 at 06:11

answered Apr 27 '15 at 06:05

karthik manchala

score 7 · Answer 2 · answered Apr 27 '15 at 06:22

7

Tested on regex101.

Pattern:

<style((.|\n|\r)*?)<\/style>

Your code:

String text = readFile("E:/textwithstyletags.txt");
retVal = text.replaceAll("<style((.|\\n|\\r)*?)<\\/style>", "");

answered Apr 27 '15 at 06:22

Jared Rummler

Rahul Tripathi · Answer 3 · 2015-04-27T06:13:57.930

3

Try this regex:

retVal  = text.replaceAll("(?i)<style.*?>.*?</style>", "");

On a side note you can look at JSoup which is a java library made for HTML manipulation.

edited Apr 27 '15 at 06:13

answered Apr 27 '15 at 06:07

Rahul Tripathi

I like this, handles everything non-greedy and case insensitive, no muss no fuss. Although I think you need to add the s flag (dot matches all) to handle linefeeds between open & close tags. like: `retVal = text.replaceAll("(?is).*?", "");` – bmiller May 08 '20 at 21:08

score 2 · Answer 4 · edited Apr 27 '15 at 06:15

2

you can use

this expression <style[\\w\\W]+?</style>

retVal = text.replaceAll("<style[\\w\\W]+?</style>", "");

It says to find all the alphanumeric character including the underscore(\w) and not word (\W) character till </script>

edited Apr 27 '15 at 06:15

karthik manchala

answered Apr 27 '15 at 06:08

Saif

4 Answers4