apzl_leasing/src_app_fresh/com/base/util/DateUtil.java

package com.base.util;

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

public class DateUtil {
	public final static String FULL_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss.SSS";
	public final static String TIME_MONTH = "MONTH";
	public final static String TIME_DAY = "DAY";
	public final static String TIME_YEAR = "YEAR";

	public static int getIntervalDays(Date startDate, Date endDate) {
		if ((null == startDate) || (null == endDate)) {
			return -1;
		}
		long intervalMilli = (endDate.getTime() - startDate.getTime());
		return (int) (intervalMilli / (24 * 60 * 60 * 1000));
	}
	
	@SuppressWarnings("static-access")
	public static String getNexMonthDate(Date date, int iInterval, String returnForMat) {
		Calendar calendar = new GregorianCalendar();
		calendar.setTime(date);
		calendar.add(calendar.MONTH, iInterval);// 把日期往后增加一个月.整数往后推,负数往前移动
		date=calendar.getTime();   //这个时间就是日期往后推一天的结果 
		String sDate = DateUtil.getSystemTimeByFormat(date, returnForMat);
		return sDate;
	}

	public static int daysOfTwo(Date startDate, Date endDate) {
		Calendar aCalendar = Calendar.getInstance();
		aCalendar.setTime(startDate);
		int day1 = aCalendar.get(Calendar.DAY_OF_YEAR);
		aCalendar.setTime(endDate);
		int day2 = aCalendar.get(Calendar.DAY_OF_YEAR);
		return day2 - day1;
	}
	
	public static int getMonthSpace(String date1, String date2)
            throws ParseException {

        int result = 0;

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");

        Calendar c1 = Calendar.getInstance();
        Calendar c2 = Calendar.getInstance();

        c1.setTime(sdf.parse(date1));
        c2.setTime(sdf.parse(date2));

        result = c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH);

        return result+( c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR))*12;

    }

	public static String addDate(Date startDate, String type, Integer num) {
		Calendar aCalendar = Calendar.getInstance();
		aCalendar.setTime(startDate);
		if (type.equalsIgnoreCase(DateUtil.TIME_DAY)) {
			aCalendar.add(Calendar.DAY_OF_YEAR, num);
		} else if (type.equalsIgnoreCase(DateUtil.TIME_MONTH)) {
			aCalendar.add(Calendar.MONTH, num);
		} else {
			aCalendar.add(Calendar.YEAR, num);
		}
		return DateUtil
				.getSystemTimeByFormat(aCalendar.getTime(), "yyyy-MM-dd");
	}

	public static String addDate(String startDate, String type, Integer num) {
		Date dateStart = getTimeByFormat(startDate, "yyyy-MM-dd");
		return addDate(dateStart, type, num);
	}

	public static Date getEndDateByDays(Date startDate, int days) {
		Calendar aCalendar = Calendar.getInstance();
		aCalendar.setTime(startDate);
		aCalendar.add(Calendar.DAY_OF_YEAR, days);
		return aCalendar.getTime();
	}

	public static String getSystemDate() {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		return sdf.format(new Date());
	}

	public static String getSystemDateTime() {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		return sdf.format(new Date());
	}

	public static String getSystemDateDetailTime() {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:sss");
		return sdf.format(new Date());
	}

	public static String getDateTime(Date date) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		if (null == date) {
			date = new Date();
		}
		return sdf.format(date);
	}

	/**
	 * @param dateFormat
	 *            输出日期格式，形如：yyyy-MM-dd HH:mm:ss
	 * @return 格式化后的日期字符串
	 */
	public static String getSystemTimeByFormat(String dateFormat) {
		SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
		return sdf.format(new Date());
	}

	public static String getSystemTimeByFormat(Date date, String dateFormat) {
		SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
		return sdf.format(date);
	}

	public static String getTimeAllByFormat(String dateFormat)
			throws ParseException {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Date date = sdf.parse(dateFormat);
		DateFormat format = new SimpleDateFormat("yyyy年MM月dd日");
		return format.format(date);
	}

	/**
	 * @param dateStr
	 *            日期字符串，形如：yyyy-MM-dd HH:mm:ss
	 * @param dateFormat
	 *            输出日期格式，形如：yyyy-MM-dd HH:mm:ss
	 * @return 格式化后的日期字符串
	 */
	public static Date getTimeByFormat(String dateStr, String dateFormat) {
		SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
		Date date = null;
		try {
			date = sdf.parse(dateStr);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return date;
	}

	/**
	 * 获取 yyyy-MM-dd 日期
	 * 
	 * @param dateStr
	 *            日期时间字符串
	 * @param dateFormat
	 *            dateStr的字符串格式
	 * @return ' yyyy-MM-dd '格式日期
	 */
	public static String getFormateDate(String dateStr, String dateFormat) {
		SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
		Date date = null;
		try {
			date = sdf.parse(dateStr);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		sdf = new SimpleDateFormat("yyyy-MM-dd");
		return sdf.format(date);

	}
	public static void main(String[] args) {
		String date = getSystemTimeByFormat(new Date(), "yyyy/MM/dd HH:mm:ss");
		System.out.println(date);
		String []dateArray = date.split("/"); 
		System.out.println("year :" + dateArray[0]);
		System.out.println("month :" + dateArray[1]);
		System.out.println("day :" + dateArray[2]);
	}
}