package org.yeshi.utils;

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

public class DateUtil {

	public static String dateDiff(String startTime, String endTime) {

		String datatime = 0 + "天" + 0 + "小时" + 0 + "分钟";
		SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");

		try {
			long nm = 1000 * 60;// 一分钟的毫秒数
			long nh = 1000 * 60 * 60;// 一小时的毫秒数
			long nd = 1000 * 24 * 60 * 60;// 一天的毫秒数

			// 获得两个时间的毫秒时间差异
			long diff = sd.parse(endTime).getTime() - sd.parse(startTime).getTime();

			long day = diff / nd;// 计算差多少天
			long hour = diff % nd / nh;// 计算差多少小时
			long min = diff % nd % nh / nm;// 计算差多少分钟

			datatime = day + "天" + hour + "小时" + min + "分钟";

		} catch (ParseException e) {
			e.printStackTrace();
		}

		return datatime;
	}

	public static String dateDiff2(Date startTime, Date endTime) throws Exception {

		String datatime = 0 + "天" + 0 + "小时" + 0 + "分钟";

		long nm = 1000 * 60;// 一分钟的毫秒数
		long nh = 1000 * 60 * 60;// 一小时的毫秒数
		long nd = 1000 * 24 * 60 * 60;// 一天的毫秒数

		// 获得两个时间的毫秒时间差异
		long diff = endTime.getTime() - startTime.getTime();

		long day = diff / nd;// 计算差多少天
		long hour = diff % nd / nh;// 计算差多少小时
		long min = diff % nd % nh / nm;// 计算差多少分钟

		datatime = day + "天" + hour + "小时" + min + "分钟";

		return datatime;
	}

	public String transferLongToDate(String dateFormat, Long millSec) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		Date date = new Date(millSec);
		return sdf.format(date);
	}

	/**
	 * 验证是否属于同一天
	 * 
	 * @param date1
	 * @param date2
	 * @return
	 */
	public static boolean isSameDay(Date date1, Date date2) {
		if (date1 != null && date2 != null) {
			Calendar cal1 = Calendar.getInstance();
			cal1.setTime(date1);
			Calendar cal2 = Calendar.getInstance();
			cal2.setTime(date2);
			return isSameDay(cal1, cal2);
		} else {
			return false;
		}
	}

	/**
	 * 验证是否属于同一天
	 * 
	 * @param cal1
	 * @param cal2
	 * @return
	 */
	public static boolean isSameDay(Calendar cal1, Calendar cal2) {
		if (cal1 != null && cal2 != null) {
			return cal1.get(0) == cal2.get(0) && cal1.get(1) == cal2.get(1) && cal1.get(6) == cal2.get(6);
		} else {
			return false;
		}
	}

	/**
	 * 指定日期加上天数后的日期
	 * 
	 * @param num
	 *            为增加的天数
	 * @param nowDate
	 *            创建时间
	 * @return
	 * @throws ParseException
	 */
	public static String plusDay(int num, String nowDate) throws ParseException {
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		Date currdate = format.parse(nowDate);
	
		Calendar ca = Calendar.getInstance();
		ca.setTime(currdate);
		ca.add(Calendar.DATE, num);
		
		return format.format(ca.getTime());
	}
}