Regex everything between two strings multiple times

Question

I have a String like

[{"id":"9","label":"P","price":"0","oldPrice":"0","products":["606","610","614","618","622","625","629"]},{"id":"8","label":"M","price":"0","oldPrice":"0","products":["607","611","615","619","626","630"]},{"id":"7","label":"G","price":"0","oldPrice":"0","products":["609","613","617","621","624","628","632"]},{"id":"36","label":"GG","price":"0","oldPrice":"0","products":["608","612","616","620","623","627","631"]},{"id":"152","label":"XGG","price":"0","oldPrice":"0","products":["3713","6577","6578","6579","6580","6581","6582"]}]

What i need is the label values: P, M, G, GG, XGG. i tried to get everything between label and a comma, but its not working

"(label)(.*)(,)"

aelor · Accepted Answer · 2014-03-19 13:56:32Z

4

(?<=label\"\:)\"\w+\"

this will do it

or if you really want to parse it as json

do this

var arr = [];
var jso = [{"id":"9","label":"P","price":"0","oldPrice":"0","products":["606","610","614","618","622","625","629"]},{"id":"8","label":"M","price":"0","oldPrice":"0","products":["607","611","615","619","626","630"]},{"id":"7","label":"G","price":"0","oldPrice":"0","products":["609","613","617","621","624","628","632"]},{"id":"36","label":"GG","price":"0","oldPrice":"0","products":["608","612","616","620","623","627","631"]},{"id":"152","label":"XGG","price":"0","oldPrice":"0","products":["3713","6577","6578","6579","6580","6581","6582"]}];
console.log(jso.length);
for(var i=0;i<jso.length;i++){
    arr.push(jso[i].label);
}
console.log(arr);

regex demo : http://regex101.com/r/kT9kE6

edited Mar 19, 2014 at 13:56

answered Mar 19, 2014 at 13:43

aelor

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Comments

anirudh · Accepted Answer · 2014-03-19 13:43:57Z

4

This string is in the JSON format and hence it is recommended to use a JSON parser rather than using regex

Read about JSON format in http://www.json.org/.

This link provides explains about JSON in java http://www.json.org/java/

answered Mar 19, 2014 at 13:43

anirudh

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2 Comments

Mauro M Over a year ago

Thank you, i know its in JSON but i cant use a parser, that comes as a String object from a web crawler that i cannot change.

anirudh Over a year ago

You can parse the JSON content present in a string

Krishna M · Accepted Answer · 2014-03-19 13:44:56Z

0

Your regular expression is greedy.

Change it to lazy

label.*?,

You can also use conditional regex to fetch only the label values

Regex using conditional expression

(?<="label":")\w+

Regex Demo

answered Mar 19, 2014 at 13:44

Krishna M

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1 Comment

ilya_i Over a year ago

Krishna M the demo in your link shows only the first occurrence of label is selected

CaffGeek · Accepted Answer · 2014-03-19 13:47:58Z

You should probably use a JSON parser, however...

This regex will capture all the labels in a group names "labels"

.*?(?:label)":"(?<labels>[^"]+)+.*?

Or depending how you are executing this, just search for this match

(?:label)":"(?<labels>[^"]+)

You can see it working here: http://regex101.com/r/fS8jA8

And the resulting JAVA (generated by regex101):

String re = "(?:label)\\":\\"(?<labels>[^\\"]+)";
String str = "[{\"id\":\"9\",\"label\":\"P\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"606\",\"610\",\"614\",\"618\",\"622\",\"625\",\"629\"]},{\"id\":\"8\",\"label\":\"M\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"607\",\"611\",\"615\",\"619\",\"626\",\"630\"]},{\"id\":\"7\",\"label\":\"G\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"609\",\"613\",\"617\",\"621\",\"624\",\"628\",\"632\"]},{\"id\":\"36\",\"label\":\"GG\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"608\",\"612\",\"616\",\"620\",\"623\",\"627\",\"631\"]},{\"id\":\"152\",\"label\":\"XGG\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"3713\",\"6577\",\"6578\",\"6579\",\"6580\",\"6581\",\"6582\"]}]
";

Pattern p = Pattern.compile(re, Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(str);

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