package com.lrs.common.utils.date;

import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

/**
 * 这是一个日期 格式转换 的类
 */
public class DateUtil {
	private final static SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");

	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");

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

	/**
	 * @Title: compareDate
	 * @Description: (日期比较，如果s>=e 返回true 否则返回false)
	 * @param s
	 * @param e
	 * @return boolean
	 * @throws @author
	 *             luguosui
	 */
	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;
		}
	}

	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;
	}


	/**
	 * 字符转日期
	 */
	public static Date formatDate(String str) throws ParseException {
		SimpleDateFormat sdf = new SimpleDateFormat();
		return sdf.parse(str);
	}

	/**
	 * 日期转字符
	 */
	public static String formatDate(Date date, String format) {
		try {
			SimpleDateFormat sdf = new SimpleDateFormat(format);
			return sdf.format(date);
		} catch (Exception e) {
			return "" + format;
		}
	}

	/**
	 * 时间戳转时间
	 */
	public static String formatTimeStamp(Long timeStamp, String format) {
		try {
			Date date = new Date(timeStamp);
			SimpleDateFormat sdf = new SimpleDateFormat(format);
			return sdf.format(date);
		} catch (Exception e) {
			System.out.println("时间戳转换失败");
			return "";
		}
	}

	/**
	 * 日期时间偏移
	 * offset = 1,date=2018-11-02 16:47:00
	 * 结果：2018-11-03 16:47:00
	 * @param date
	 * @param offset
	 * @return
	 */
	public static Date offset(Date date, int offset) {
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		cal.add(Calendar.DAY_OF_MONTH, offset);
		return cal.getTime();
	}

	/**
	 *  获取当天的开始时间
	 * @return
	 */
	public static Date getDayBegin() {
		Calendar cal = new GregorianCalendar();
		cal.set(Calendar.HOUR_OF_DAY, 0);
		cal.set(Calendar.MINUTE, 0);
		cal.set(Calendar.SECOND, 0);
		cal.set(Calendar.MILLISECOND, 0);
		return cal.getTime();
	}
	/**
	 *  获取当天的结束时间
	 * @return
	 */
	public static Date getDayEnd() {
		Calendar cal = new GregorianCalendar();
		cal.set(Calendar.HOUR_OF_DAY, 23);
		cal.set(Calendar.MINUTE, 59);
		cal.set(Calendar.SECOND, 59);
		return cal.getTime();
	}
	/**
	 *  获取昨天的开始时间
	 * @return
	 */
	public static Date getBeginDayOfYesterday() {
		Calendar cal = new GregorianCalendar();
		cal.setTime(getDayBegin());
		cal.add(Calendar.DAY_OF_MONTH, -1);
		return cal.getTime();
	}
	/**
	 *  获取昨天的结束时间
	 * @return
	 */
	public static Date getEndDayOfYesterDay() {
		Calendar cal = new GregorianCalendar();
		cal.setTime(getDayEnd());
		cal.add(Calendar.DAY_OF_MONTH, -1);
		return cal.getTime();
	}

	/**
	 *  获取明天的开始时间
	 * @return
	 */
	public static Date getBeginDayOfTomorrow() {
		Calendar cal = new GregorianCalendar();
		cal.setTime(getDayBegin());
		cal.add(Calendar.DAY_OF_MONTH, 1);
		return cal.getTime();
	}
	/**
	 *  获取明天的结束时间
	 * @return
	 */
	public static Date getEndDayOfTomorrow() {
		Calendar cal = new GregorianCalendar();
		cal.setTime(getDayEnd());
		cal.add(Calendar.DAY_OF_MONTH, 1);
		return cal.getTime();
	}

	/**
	 * 获取本周的开始时间
	 * @return
	 */
	public static Date getBeginDayOfWeek() {
		Date date = new Date();
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
		if (dayofweek == 1) {
			dayofweek += 7;
		}
		cal.add(Calendar.DATE, 2 - dayofweek);
		return getDayStartTime(cal.getTime());
	}
	/**
	 *  获取本周的结束时间
	 * @return
	 */
	public static Date getEndDayOfWeek() {
		Calendar cal = Calendar.getInstance();
		cal.setTime(getBeginDayOfWeek());
		cal.add(Calendar.DAY_OF_WEEK, 6);
		Date weekEndSta = cal.getTime();
		return getDayEndTime(weekEndSta);
	}

	/**
	 *  获取本月的开始时间
	 * @return
	 */
	public static Date getBeginDayOfMonth() {
		Calendar calendar = Calendar.getInstance();
		calendar.set(getNowYear(), getNowMonth() - 1, 1);
		return getDayStartTime(calendar.getTime());
	}
	/**
	 *  获取本月的结束时间
	 * @return
	 */
	public static Date getEndDayOfMonth() {
		Calendar calendar = Calendar.getInstance();
		calendar.set(getNowYear(), getNowMonth() - 1, 1);
		int day = calendar.getActualMaximum(5);
		calendar.set(getNowYear(), getNowMonth() - 1, day);
		return getDayEndTime(calendar.getTime());
	}

	/**
	 *  获取今年是哪一年
	 * @return
	 */
	public static Integer getNowYear() {
		Date date = new Date();
		GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
		gc.setTime(date);
		return Integer.valueOf(gc.get(1));
	}
	/**
	 *  获取本月是哪一月
	 * @return
	 */
	public static int getNowMonth() {
		Date date = new Date();
		GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
		gc.setTime(date);
		return gc.get(2) + 1;
	}

	/**
	 *  获取某个日期的开始时间
	 * @param d
	 * @return
	 */
	public static Timestamp getDayStartTime(Date d) {
		Calendar calendar = Calendar.getInstance();
		if (null != d)
			calendar.setTime(d);
		calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH), 0,
				0, 0);
		calendar.set(Calendar.MILLISECOND, 0);
		return new Timestamp(calendar.getTimeInMillis());
	}
	/**
	 *  获取某个日期的结束时间
	 * @param d
	 * @return
	 */
	public static Timestamp getDayEndTime(Date d) {
		Calendar calendar = Calendar.getInstance();
		if (null != d)
			calendar.setTime(d);
		calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH), 23,
				59, 59);
		calendar.set(Calendar.MILLISECOND, 999);
		return new Timestamp(calendar.getTimeInMillis());
	}

	public static void main(String[] args) {
		System.out.println(getDays());
		System.out.println(getAfterDayWeek("3"));
		System.out.println(getTime());
	}

}
