校验日期格式为YYYYMM

校验日期格式为YYYYMM

import java.util.regex.Pattern;

    private static final String MONTH_REGEX = "^([1-9]\\d{3})(([0]{0,1}[1-9])|([1][0-2]))$";
    
    public static boolean dateFormat(String date) {
    	boolean matches = Pattern.matches(MONTH_REGEX, date);
    	System.out.println(matches);
        return matches;
    }
    public static void main(String[] args) {
        String date = "319912";
        dateFormat(date);
    }

另一种

public static final String MONTH_REGEX = "^([1-9]\\d{3})(([0]{0,1}[1-9])|([1][0-2]))$";

    public static boolean Regular(String str, String pattern) {
        if (null == str || str.trim().length() <= 0) {
            return false;
        }
        Pattern p = Pattern.compile(pattern);
        Matcher m = p.matcher(str);
        return m.matches();
    }
    // 校验日期格式为YYYYMM
    public static void main(String[] args) {
        String date = "199024";
        if (Regular(date,MONTH_REGEX)){
            System.out.println("异常");
        }
    }