获取当前时间并间接获取当年的0101 - 1231

package service;

import common.constant.NumConstant;
import common.utils.DateUtil;
import common.utils.StringUtil;
import org.apache.commons.lang3.StringUtils;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;

import java.util.Date;

/**
 * 获取当前时间并间接获取当年的0101 - 1231
 *
 * @author zhangkuan
 * @version Id: TimeConvertTest.java, v 0.1 2022/5/10 15:00 PM zhangkuan Exp $$
 */
public class TimeConvertTest {

    /**
     * 日期时间格式：yyyyMMddHHmmssSSS
     */
    public static final String FULL_PATTERNS = "yyyyMMddHHmmssSSS";

    /**
     * 日期格式：yyyyMMdd
     */
    public static final String DATE_PATTERN = "yyyyMMdd";

    /**
     * 日期时间格式：yyyyMMddHHmmss
     */
    public static final String FULL_PATTERN = "yyyyMMddHHmmss";

    public void timeTest() {
        String beginTime = null;
        Date endTime = null;
        if (beginTime == null || endTime == null) {
            beginTime = DateUtil.getDateTimeStamp();
            System.out.println(beginTime);
            String s = StringUtil.subStr(beginTime,0,4);
            System.out.println(s);
            String s1 = String.valueOf(s.concat("0101"));
            System.out.println(s1);
            Date startTime = parse(s1);
            System.out.println(startTime);
            String s2 = String.valueOf(s.concat("1231"));
            Date endTime1  = parse(s2);
            System.out.println(s2);
            System.out.println(endTime1);
        }
    }

    private static Date parse(String date) {
        if (!StringUtils.isBlank(date) && date.length() > NumConstant.INT_FOURTEEN) {
            return parse(date, FULL_PATTERNS);
        }
        return parse(date, DATE_PATTERN);
    }

    /**
     * 6、将String 【yyyyMMddHHmiss】类型转换成Date类型
     *
     * @param date    格式：yyyyMMdd
     * @param pattern 格式：yyyyMMdd
     * @return Date
     */
    public static Date parse(String date, String pattern) {
        DateTime dateTime = parseTime(date, pattern);
        if (dateTime == null) {
            return null;
        }
        return dateTime.toDate();
    }

    /**
     * 7、将String 【yyyyMMddHHmiss】类型转换成Date类型
     *
     * @param date    格式：yyyyMMddHHmiss
     * @param pattern yyyyMMddHHmiss
     * @return DateTime
     */
    private static DateTime parseTime(String date, String pattern) {
        if (StringUtils.isBlank(date)) {
            return null;
        }
        //这段逻辑整合自 gateway-bank 中的 DateUtil
        if (FULL_PATTERN.equals(pattern)) {
            return DateTimeFormat.forPattern(pattern).parseDateTime(StringUtils.rightPad(date, 14, '0'));
        } else {
            return DateTimeFormat.forPattern(pattern).parseDateTime(date);
        }
    }


    /**
     * 测试主函数
     */
    public static void main(String[] args) {
        TimeConvertTest test = new TimeConvertTest();
        test.timeTest();
//        Date endTime = DateUtil.getEndTimes();
//        System.out.println(endTime);
    }
}