Java REGEX-无法删除标签内的内容

Question

This is my input text:

[QUOTE=SynapseBreak;104047835]Armchio de dragon is satki dragon lai de leh

[URL="https://play.google.com/store/apps/details?id=com.shiportal.hwzreader&referrer=utm_source%3Dsignature%26utm_medium%3Dforum"]Sent from 權志-龍 using GAGT[/URL][/QUOTE]
why satki ? tell me :s13:

[QUOTE=articated;104047854]I not sad lah
U happy i happy kym

Just for fun loh :s12:
[ms]自從我變成了狗屎，就再也沒有人敢踩在我頭上了 HardwareZone Forums app[/ms][/QUOTE]
today arti jin sweet make me happy :s12:

[QUOTE=Iandao;104047967]Gg mbs now...[/QUOTE]
go there jiak simi ??

I am trying to remove all the content inside [QUOTE] [/QUOTE] tags and the tags themselves.

I want the output to be :

why satki ? tell me :s13: today arti jin sweet make me happy :s12: go there jiak simi ??  

The code i tried is:

string.replaceAll("\\[QUOTE.*\\[/QUOTE\\]", "")

Answer 1

Note that you may use the following fix for your pattern only if the input does not contain nested [QUOTE] tages .

A . in your regex does not match line breaks, and .* is too greedy, ie will match up to the last occurrence of [/QUOTE] on a line/in a string.

Use lazy dot matching with the Pattern.DOTALL inline modifier (embedded flag option) (?s) that will force the . to match any char:

"(?s)\\[QUOTE=.*?\\[/QUOTE\\]" 
 ^^^^         ^^^

See this regex demo .

Or, unroll the lazy dot (to make the pattern find matches faster) as:

"\\[QUOTE=[^\\[]*(?:\\[(?!/QUOTE\\])[^\\[]*)*\\[/QUOTE\\]"

See this regex demo .

Java demo :

String pat = "\\[QUOTE=[^\\[]*(?:\\[(?!/QUOTE])[^\\[]*)*\\[/QUOTE]";
String str = "[QUOTE=SynapseBreak;104047835]Armchio de dragon is satki dragon lai de leh\n\n[URL=\"https://play.google.com/store/apps/details?id=com.shiportal.hwzreader&referrer=utm_source%3Dsignature%26utm_medium%3Dforum\"]Sent from 權志-龍 using GAGT[/URL][/QUOTE]\nwhy satki ? tell me :s13:\n[QUOTE=articated;104047854]I not sad lah\nU happy i happy kym\n\nJust for fun loh :s12:\n[ms]自從我變成了狗屎，就再也沒有人敢踩在我頭上了 HardwareZone Forums app[/ms][/QUOTE]\ntoday arti jin sweet make me happy :s12:\n\n[QUOTE=Iandao;104047967]Gg mbs now...[/QUOTE]\ngo there jiak simi ??'";
String res = str.replaceAll(pat, "");
System.out.println(res); 
// => why satki ? tell me :s13:
//
//    today arti jin sweet make me happy :s12:
//
//
//     go there jiak simi ??'

Answer 2

Your regex is not taking new lines into account. This is done by adding (?s) at the beginning.

string.replaceAll("(?s)\\[QUOTE.*?\\[/QUOTE\\]", "");

Answer 3

(?s)\\[QUOTE.*?\\[/QUOTE\\]

Try the above RegEx. It will work.