Regex -使用正则表达式提取电子邮件文档的子字符串

\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}\b

import re

text = "This is a sample email address: example@example.com"
pattern = r'\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}\b'
emails = re.findall(pattern, text)
print(emails)

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class EmailExtractor {
    public static void main(String[] args) {
        String text = "This is a sample email address: example@example.com";
        String pattern = "\\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}\\b";
        Pattern regex = Pattern.compile(pattern);
        Matcher matcher = regex.matcher(text);

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