package com.servicemall.systemcommon.util;

import org.springframework.util.StringUtils;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * 说明：日期处理 创建人：warren 修改时间：2015年11月24日
 *
 * @version
 */
public class DateUtil {

	private final static SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");

	private final static SimpleDateFormat sdfMonth = new SimpleDateFormat("MM");

	private final static SimpleDateFormat sdfDate = new SimpleDateFormat("dd");

	private final static SimpleDateFormat sdfDay = new SimpleDateFormat("yyyy-MM-dd");

	private final static SimpleDateFormat sdfDays = new SimpleDateFormat("yyyyMMdd");

	private final static SimpleDateFormat sdfTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

	private final static SimpleDateFormat sdfTimes = new SimpleDateFormat("yyyyMMddHHmmss");

	/**
	 * 获取YYYY格式
	 *
	 * @return
	 */
	public static String getSdfTimes() {
		return sdfTimes.format(new Date());
	}

	/**
	 * 获取YYYY格式
	 *
	 * @return
	 */
	public static String getYear() {
		return sdfYear.format(new Date());
	}

	/**
	 * 获取MM格式
	 *
	 * @return
	 */
	public static String getMonth() {
		return sdfMonth.format(new Date());
	}

	/**
	 * 获取YYYY-MM-DD格式
	 *
	 * @return
	 */
	public static String getDay() {
		return sdfDay.format(new Date());
	}

	/**
	 * 获取YYYYMMDD格式
	 *
	 * @return
	 */
	public static String getDays() {
		return sdfDays.format(new Date());
	}

	/**
	 * 获取DD格式
	 *
	 * @return
	 */
	public static String getDate() {
		return sdfDate.format(new Date());
	}

	/**
	 * 获取YYYY-MM-DD HH:mm:ss格式
	 *
	 * @return
	 */
	public static String getTime() {
		return sdfTime.format(new Date());
	}

	/**
	 * @Title: compareDate
	 * @Description: TODO(日期比较，如果s>=e 返回true 否则返回false)
	 * @param s
	 * @param e
	 * @return boolean
	 * @throws @author
	 *             fh
	 */
	public static boolean compareDate(String s, String e) {
		if (fomatDate(s) == null || fomatDate(e) == null) {
			return false;
		}
		return fomatDate(s).getTime() >= fomatDate(e).getTime();
	}

	/**
	 * 格式化日期
	 *
	 * @return
	 */
	public static Date fomatDate(String date) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			return fmt.parse(date);
		} catch (ParseException e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * 校验日期是否合法
	 *
	 * @return
	 */
	public static boolean isValidDate(String s) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			fmt.parse(s);
			return true;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return false;
		}
	}

	/**
	 * @param startTime
	 * @param endTime
	 * @return
	 */
	public static int getDiffYear(String startTime, String endTime) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			// long aa=0;
			int years = (int) (((fmt.parse(endTime).getTime() - fmt.parse(startTime).getTime()) / (1000 * 60 * 60 * 24))
					/ 365);
			return years;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return 0;
		}
	}

	/**
	 * <li>功能描述：时间相减得到天数
	 *
	 * @param beginDateStr
	 * @param endDateStr
	 * @return long
	 * @author Administrator
	 */
	public static long getDaySub(String beginDateStr, String endDateStr) {
		long day = 0;
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		Date beginDate = null;
		Date endDate = null;

		try {
			beginDate = format.parse(beginDateStr);
			endDate = format.parse(endDateStr);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		day = (endDate.getTime() - beginDate.getTime()) / (24 * 60 * 60 * 1000);
		// System.out.println("相隔的天数="+day);

		return day;
	}

	/**
	 * 得到n天之后的日期
	 *
	 * @param days
	 * @return
	 */
	public static String getAfterDayDate(String days) {
		int daysInt = Integer.parseInt(days);

		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();

		SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String dateStr = sdfd.format(date);

		return dateStr;
	}

	/**
	 * 得到n天之后是周几
	 *
	 * @param days
	 * @return
	 */
	public static String getAfterDayWeek(String days) {
		int daysInt = Integer.parseInt(days);
		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();
		SimpleDateFormat sdf = new SimpleDateFormat("E");
		String dateStr = sdf.format(date);
		return dateStr;
	}

	public static Long dateToStamp(String s) throws ParseException {
		SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm");
		Date date = simpleDateFormat.parse(s);
		long ts = date.getTime();
		return ts;
	}

	public static String getHMS(long timetemp) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTimeInMillis(timetemp);
		SimpleDateFormat fmat = new SimpleDateFormat("HH:mm");
		String time = fmat.format(calendar.getTime());
		return time;
	}

	public static String getYMDHMS(long timetemp) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTimeInMillis(timetemp);
		SimpleDateFormat fmat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String time = fmat.format(calendar.getTime());
		return time;
	}

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

	/**
	 * 获取开始日期到今天的间隔天数
	 *
	 * @param startDate
	 *            开始时间
	 * @return 相差天数
	 */
	public static long daysBetween(Date startDate) {
		return daysBetween(startDate, new Date());
	}

	/**
	 * 获取两个日期之间间隔的天数
	 *
	 * @param startDate
	 *            开始时间
	 * @param endDate
	 *            结束时间
	 * @return 相差天数
	 */
	public static long daysBetween(Date startDate, Date endDate) {
		return (endDate.getTime() - startDate.getTime()) / (1000 * 3600 * 24) + 1;
	}


	/**
	 * 字符串转日期
	 * @param datestr
	 * @return
	 */
	public static Date getDateFromStr(String datestr) {
		SimpleDateFormat fmt =  new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss");
		try {
			return fmt.parse(datestr);
		} catch (ParseException e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * 字符串转日期
	 * @param date
	 * @param fmt	形如yyyy-MM-dd HH:mm:ss
	 * @return
	 */
	public static String getStrFromDate(Date date,String fmt) {
		if(StringUtils.isEmpty(fmt)){
			return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);
		}
		SimpleDateFormat sdf = new SimpleDateFormat(fmt);
		return sdf.format(date);
	}


}