text = "Hello, my email address is example@example.com" # 定义正则表达式模式 pattern = r'\b\w+@\w+\.\w+\b' # 使用re模块的findall函数进行匹配 matches = re.findall(pattern, text) # 打印匹配结果 for match in matches: print(match) 在上述代码中,我们定义了一个待匹配的字符串text,其中...
Global pattern flags g modifier:global. All matches (don't return after first match) m modifier:multi line. Causes^and$to match the begin/end of each line (not only begin/end of string) Match Information Regular Expression / ([a-z0-9].*)@([a-z0-9].*)\.([a-z]{2,3}) ...
A regular expression (REGEX) is a character sequence defining a search pattern. A REGEX pattern can consist of literal characters, such as “abc”, or special characters, such as “.”, “", “+”, “?”, and more. Special characters have special meanings and functions in REGEX. A REGE...
} else { std::cout << email << " is not a valid email address." << std::endl; } return 0; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 6.2 提取 URL 中的域名 正则表达式: std::string pattern = R"(https?://([\w.-]+)/?)"; 1. 示例代码: #inc...
importredefvalidate_email(email):pattern=r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'ifre.match(pattern,email):print(f"{email}是一个有效的邮箱地址")else:print(f"{email}不是一个有效的邮箱地址")# 测试validate_email("user@example.com")validate_email("invalid_email@...
import java.util.HashMap; import java.util.Map; import java.util.regex.Pattern; public class RegexUtils { private static Pattern PATTERN_EMAIL = Pattern .compile("^[//w-]+(//.[//w-]+)*@[//w-]+(//.[//w-]+)+$");// 邮件地址 private static Pattern PATTERN_TEL = Pattern .compi...
首先,什么是正则表达呢?正则表达可以理解为是一种pattern,用来匹配字符串。正则表达在许多场景下都有应用,比如爬虫、文本查到等,使用起来也非常灵活,入门很简单,但是要用得好却很难。在许多文本编辑器中都可以使用正则表达,而且语法差异不大,可以说是人手必备的技能啊。
publicstaticbooleanisEmail(String email) { if(email ==null) returnfalse; else returnPATTERN_EMAIL.matcher(email).matches(); } publicstaticbooleanisTelephone(String telephone) { if(telephone ==null) returnfalse; else returnPATTERN_TEL.matcher(telephone).matches(); ...
REGEX_MATCH( {Email address}, "(\W|^)[\w.\\-]{0,25}@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}(\W|$)") This regex handles basic validation for email addresses: Starts with a username that is composed of letters, numbers, or characters like underscore, period or dash. An at-sign ...
Provides regular expression (regex) pattern matching capability in aggregation expressions. The operator returns an array of documents that contains information on each match. If a match is not found, returns an empty array. MongoDB uses Perl compatible regular expressions (i.e. "PCRE" ) version...