重写用于Java的RegEx

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

String emailRegex = "^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}$";
String email = "example@example.com";

Pattern pattern = Pattern.compile(emailRegex);
Matcher matcher = pattern.matcher(email);

if (matcher.matches()) {
    System.out.println("有效的电子邮件地址");
} else {
    System.out.println("无效的电子邮件地址");
}

^\d{3}-\d{3}-\d{4}$

String phoneRegex = "^\\d{3}-\\d{3}-\\d{4}$";
String phoneNumber = "123-456-7890";

Pattern pattern = Pattern.compile(phoneRegex);
Matcher matcher = pattern.matcher(phoneNumber);

if (matcher.matches()) {
    System.out.println("有效的电话号码格式");
} else {
    System.out.println("无效的电话号码格式");
}

<(\w+)>(.*?)<\/\1>

String html = "<div>Hello World</div>";
String regex = "<(\\w+)>(.*?)<\/\\1>";

Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(html);

while (matcher.find()) {
    String tag = matcher.group(1);
    String content = matcher.group(2);
    System.out.println("标签: " + tag + ", 内容: " + content);
}

^(19|20)\d\d-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$

String dateRegex = "^(19|20)\\d\\d-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$";
String date = "2023-10-05";

Pattern pattern = Pattern.compile(dateRegex);
Matcher matcher = pattern.matcher(date);

if (matcher.matches()) {
    System.out.println("有效的日期格式");
} else {
    System.out.println("无效的日期格式");
}