import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Date;

/**
 * <p>
 * Title:
 * </p>
 * 
 * @author: xiangsizi
 * @date: 2019/04/03
 * @version: v1.0
 */
public class DateUtils {
	public static final String YEAR_MONTH_DAY_SECOND = "yyyy-MM-dd HH:mm:ss";
	
	public static final String YEAR_MONTH_DAY_SECOND_1 = "yyyy-M-dd HH:mm:ss";
	public static final String YEAR_MONTH_DAY_SECOND_2 = "yyyy-MM-d HH:mm:ss";
	public static final String YEAR_MONTH_DAY_SECOND_3 = "yyyy-M-d HH:mm:ss";
	
	
	
	
	
	public static final String YEAR_MONTH_DAY = "yyyy-MM-dd";
	public static final String YEAR_MONTH_DAY_1 = "yyyy-M-dd";
	public static final String YEAR_MONTH_DAY_2 = "yyyy-MM-d";
	public static final String YEAR_MONTH_DAY_3 = "yyyy-M-d";
	
	
	public static final String HHMMSS = "HH:mm:ss";
	
	private static final DateTimeFormatter formatterTime = DateTimeFormatter.ofPattern(YEAR_MONTH_DAY_SECOND);
	
	private static final DateTimeFormatter formatterTime_1 = DateTimeFormatter.ofPattern(YEAR_MONTH_DAY_SECOND_1);
	
	private static final DateTimeFormatter formatterTime_2 = DateTimeFormatter.ofPattern(YEAR_MONTH_DAY_SECOND_2);
	
	private static final DateTimeFormatter formatterTime_3 = DateTimeFormatter.ofPattern(YEAR_MONTH_DAY_SECOND_3);
	
	
	private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern(YEAR_MONTH_DAY);
	
	private static final DateTimeFormatter formatter_1 = DateTimeFormatter.ofPattern(YEAR_MONTH_DAY_1);
	
	private static final DateTimeFormatter formatter_2 = DateTimeFormatter.ofPattern(YEAR_MONTH_DAY_2);
	
	private static final DateTimeFormatter formatter_3 = DateTimeFormatter.ofPattern(YEAR_MONTH_DAY_3);
	
	
	
	private static final SimpleDateFormat time = new SimpleDateFormat(HHMMSS);
	
	private static final ZoneId zoneId = ZoneId.systemDefault();
	
	/**
	 * 1000-01-01
	 */
	public static final Date minDate = new Date(-30609820800000l);
	/**
	 * 3000-01-01
	 */
	public static final Date maxDate = new Date(32503651200000l);
	
	
	private static final SimpleDateFormat COMMON_DATE_FORMAT_NY = new SimpleDateFormat("yyyy-MM");
	
	private static final SimpleDateFormat COMMON_DATE_FORMAT_YR = new SimpleDateFormat("MM-dd");
	
	private static final SimpleDateFormat COMMON_DATE_FORMAT_Y = new SimpleDateFormat("MM");

	
	/**
	 *     时间转字符
	 * @param date
	 * @return MM
	 */
	public static String dateToStrinMM(Date date) {
		synchronized (COMMON_DATE_FORMAT_Y) {
			String updateDate = COMMON_DATE_FORMAT_Y.format(date);
			return updateDate;
		}
	}
	/**
	 *     时间转字符
	 * @param date
	 * @return MM-dd
	 */
	public static String dateToStrinMMDD(Date date) {
		synchronized (COMMON_DATE_FORMAT_YR) {
			String updateDate = COMMON_DATE_FORMAT_YR.format(date);
			return updateDate;
		}
	}
	
	/**
	 *     时间转字符
	 * @param date
	 * @return yyyy-MM
	 */
	public static String dateToStringYYYYMM(Date date) {
		synchronized (COMMON_DATE_FORMAT_NY) {
			String updateDate = COMMON_DATE_FORMAT_NY.format(date);
			return updateDate;
		}
	}
	
	/**
	 *     时间转字符
	 * @param date
	 * @return yyyy-MM-dd HH:mm:ss
	 */
	public static String dateToStringTime(Date date) {
		if(date == null) {
			return null;
		}
		Instant instant = date.toInstant();
		LocalDateTime localDateTime = instant.atZone(zoneId).toLocalDateTime();
		String updateDate = formatterTime.format(localDateTime);
		return updateDate;
	}
	
	/**
	 *     时间转字符
	 * @param date
	 * @return yyyy-MM-dd
	 */
	public static String dateToString(Date date) {
		if(date == null) {
			return null;
		}
		Instant instant = date.toInstant();
		LocalDate localDateTime = instant.atZone(zoneId).toLocalDate();
		String updateDate = formatter.format(localDateTime);
		return updateDate;
	}
	
	/**
	 *     时间转字符
	 * @param date
	 * @return HH:mm:ss
	 */
	public static String dateToTime(Date date) {
		synchronized (time) {
			if(date == null) {
				return null;
			}
			String updateDate = time.format(date);
			return updateDate;
		}
	}
	
	
	/**
	 *     字符转时间
	 * @param dateStr  yyyy-MM-dd HH:mm:ss
	 * @return Date
	 */
	public static Date stringTimeToDate(String dateStr) {
		String[] splits = dateStr.split("-");
		DateTimeFormatter temp = null;
		if(splits[1].length() == 1  && splits[2].length() == 11) {
			temp = formatterTime_1;
		}else if(splits[1].length() == 2  && splits[2].length() == 10) {
			temp = formatterTime_2;
		}else if(splits[1].length() == 1  && splits[2].length() == 10) {
			temp = formatterTime_3;
		}else {
			temp = formatterTime;
		}
		LocalDateTime date= LocalDateTime.parse(dateStr, temp);
		Instant instant = date.atZone(zoneId).toInstant();
		return Date.from(instant);
	}
	
	/**
	 *     字符转时间
	 * @param dateStr  yyyy-MM-dd
	 * @return Date
	 */
	public static Date  stringToDate(String dateStr) {
		String[] splits = dateStr.split("-");
		DateTimeFormatter temp = null;
		if(splits[1].length() == 1  && splits[2].length() == 2) {
			temp = formatter_1;
		}else if(splits[1].length() == 2  && splits[2].length() == 1) {
			temp = formatter_2;
		}else if(splits[1].length() == 1  && splits[2].length() == 1) {
			temp = formatter_3;
		}else {
			temp = formatter;
		}
		LocalDate date= LocalDate.parse(dateStr, temp);
		Instant instant = date.atStartOfDay().atZone(zoneId).toInstant();
		return Date.from(instant);
	}
	/**
	 *     字符转时间
	 * @param dateStr  HH:mm:ss
	 * @return Date
	 * @throws ParseException 
	 */
	public static Date timeToDate(String dateStr) throws ParseException {
		synchronized (time) {
			return time.parse(dateStr);
		}
	}

	/**
	 * 检查是不是有效的时期
	 * 
	 * @param date
	 * @return
	 */
	public static boolean checkDate(Date date) {
		if (minDate.compareTo(date) > 0) {
			return false;
		} else if (maxDate.compareTo(date) < 0) {
			return false;
		}
		return true;
	}

	public static void main(String[] strs) {
	}


}