How to extract a substring using regex in java

Question

I have the following string :

String xmlnode = "<firstname id="{$person.id}"> {$person.firstname} </firstname>";

How can I write a regex to extract the data inside the {$STRING_I_WANT}

The part I need is without {$} how can I achieve that?

Answer 1

You can use this regex \{\$(.*?)\} with pattern like this :

String xmlnode = "<firstname id=\"{$person.id}\"> {$person.firstname} </firstname>";

Pattern pattern = Pattern.compile("\\{\\$(.*?)\\}");
Matcher matcher = pattern.matcher(xmlnode);

while (matcher.find()) {
    System.out.println(matcher.group(1));
}

Note : you have to escape each character { $ } with \ because each one is special character in regex.

Outputs

person.id
person.firstname