Java正则表达式详解及实用案例(附详细代码)

System.out.println("a".matches("[abc]")); // true
System.out.println("z".matches("[abc]")); // false
System.out.println("bc".matches("[abc][abc]")); // true

System.out.println("123".matches("\\d+")); // true
System.out.println("@".matches("\\w"));    // false
System.out.println("abc_123".matches("\\w+")); // true

System.out.println("123456789".matches("\\d{9}")); // true
System.out.println("123".matches("\\d{1,5}"));    // true

String qq = "12345678987";
System.out.println(qq.matches("[1-9]\\d{5,19}")); // true

String phone = "13933447894";
System.out.println(phone.matches("1[3-9]\\d{9}")); // true

String email = "gaomengsuanjia@163.com";
System.out.println(email.matches("\\w+([-+.']\\w+)*@[a-zA-Z0-9]+(\\.[a-zA-Z]{2,})+")); // true

String tel = "020-5698137";
System.out.println(tel.matches("0\\d{2,3}-?[1-9]\\d{4,9}")); // true

String text = "java8和java11是长期支持版本，下一个是java17。";
Pattern pattern = Pattern.compile("java\\d{0,2}");
Matcher matcher = pattern.matcher(text);
while (matcher.find()) {
    System.out.println(matcher.group());
}
// 输出：java8、java11、java17