java正侧表达式组合(group)使用

正则表达式有很多细节及特殊情况,不同的场景需要根据实际需求进行组合使用

import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class GroupExample {
   public static void main(String[] args) {
       String input = "John Smith is a software developer, his phonenumber is 123-456-7890";
       String pattern = "(\\w+)\\s(\\w+)\\s.*\\s.*,.*(\\d{3}-\\d{3}-\\d{4})";
 
       // Compile the pattern
       Pattern p = Pattern.compile(pattern);
 
       // Get a matcher object
       Matcher m = p.matcher(input);
 
       if (m.find()) {
           // Get the whole match
           System.out.println("Whole match: " + m.group());
           // Get the first captured group
           System.out.println("First captured group: " + m.group(1));
           // Get the second captured group
           System.out.println("Second captured