java校验日期的合法性_java 判断日期是否合法

https://blog.51cto.com/u_13416/6411660

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.format.ResolverStyle;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegTest {
    public static void main(String[] args) {
        Matcher matcher = Pattern.compile("(SCP)([0-9]{4}[0-9]{2}[0-9]{2})([0-9]{8})").matcher("fjishh哈哈哈，打卡机；SCP2023510145623587");
        if (matcher.find()) {
            //校验日期是否合法
            String format = "yyyyMMdd";
            DateTimeFormatter ldt = DateTimeFormatter.ofPattern(format.replace("y", "u")).withResolverStyle(ResolverStyle.STRICT);
            System.out.println(matcher.group(0));
            System.out.println(matcher.group(1));
            System.out.println(matcher.group(2));
            System.out.println(matcher.group(3));
            boolean validateRes = LocalDate.parse(matcher.group(2), ldt) == null ? false : true;
            if (validateRes) {
                System.out.println("成功了");
            }
        }
    }
}

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