CODEWITHSUNDEEP
javaregexreplace
rhorvath
rhorvath

Reputation: 3725

RegEx for HTML replace

Hi I am trying to find RegEx which helps me to replace words in HTML. Problem occurs if the word i am trying to replace is in HTML tag as well.

Example:<img class="TEST">asd TEST asd dsa asd </img>
and i need to get the second "TEST" only.

RegEx i am looking for should look like >[^<]*TEST, but this regex takes chars before the word TEST as well. Is it possible to select only word TEST ? but imagine other combinations as well (i dont think " TEST " is a good solution as soon as text could contain another chars as well)

Upvotes: 1

Views: 673

Answers (3)

Gursel Koca
Gursel Koca

Reputation: 21300

First of all, regex is not good option for html parsing.. There are lots of enhanced html parsers that you can use..

But if you insist to use regex , here is the regex ;

(?<=>.*)TEST(?=.*<)

for java,

(?<=>.{0,100000})TEST(?=.{0,100000}<)

for more information why we can not use * or + with lookbehind regex in Java , Regex look-behind without obvious maximum length in Java

Upvotes: 2

Dude Dawg Homie
Dude Dawg Homie

Reputation: 1

How about if "TEST" is inside another tag than , like say inside the body tag, or for that matter inside the html tag?

Upvotes: 0

Joeri Hendrickx
Joeri Hendrickx

Reputation: 17435

First of all, like has been said and will be said again, using regex for XML is usually a bad idea. But for really simple cases it can work, especially if you can live with sub-optimal results.

So, just put the test in a group and replace only the group

Something like

Pattern replacePattern = Pattern.compile(">[^<]*(TEST)");
Matcher matcher = replacePattern.matcher(theString);
String result = theString.substr(1,matcher.start(1)) + replacement + theString.substr(matcher.end(1));

Disclaimer: Not tested, might have some off-by-ones. But the concept should be clear.

Upvotes: 1

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