java - Regular expression matching issue with the following scenario -

java - Regular expression matching issue with the following scenario -

i developing application. user come in of setting value in server. when inquire value server through inbuilt api. getting values whole string: example-

name={abc};display={xyz};addressname={123}

here properties name, display , address , there respective values abc, xyz , 123. used split ; first delimeter , = sec dleimeter.

string[] propertyvalues=ipropertiesstrings.split(";"); for(int i=0;i<propertyvalues.length;i++) { if(isnullempty(propertyvalues[i])) continue; string[] propertyvalue=propertyvalues[i].split("="); if(propertyvalue.length!=2) mpropertyvalues.put(propertyvalue[0], ""); else mpropertyvalues.put(propertyvalue[0], propertyvalue[1]); } }

here mpropertyvalues hash map used keeping property name , value.

problem there can string :

case 1: name={abc};display={ xyz=deno; demo2=pol };addressname={123} case 2: name=;display={ xyz=deno; demo2=pol };addressname={123}

i want hashmap filled :

case 1:

name ="abc" display = "xyz= demo; demo2 =pol" addressname = "123"

for case 2:

name ="" display = "xyz= demo; demo2 =pol" addressname = "123"

i looking regular look split these strings;

assuming there can't nested {} should need

string info = "name=;display={ xyz=deno; demo2=pol };addressname={123}"; pattern p = pattern.compile("(?<name>\\w+)=(\\{(?<value>[^}]*)\\})?(;|$)"); matcher m = p.matcher(data); while (m.find()){ system.out.println(m.group("name")+"->"+(m.group("value")==null?"":m.group("value").trim())); }

output:

name-> display->xyz=deno; demo2=pol addressname->123

explanation

(?<name>\\w+)=(\\{(?<value>[^}]*)\\})?(;|$) can split parts

(?<name>\\w+)= represents xxxx= , place xxxx in grouping named name (of property) (\\{(?<value>[^}]*)\\})? optional {xxxx} part x can't }. place xxxx part in grouping named value. (;|$) represents ; or end of info (represented $ anchor) since formula name=value; or in case of pair placed @ end of info name=value.

java regex