package cn.emay.sdk.util;
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import java.text.SimpleDateFormat;
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import java.util.Calendar;
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import java.util.Date;
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public class DateUtil {
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public static final long ONE_HOUR_TIME_LONG = 3600000;
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public static String toString(Date date, String format) {
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String dateStr = null;
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try {
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SimpleDateFormat sdf = new SimpleDateFormat(format);
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dateStr = sdf.format(date);
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} catch (Exception e) {
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}
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return dateStr;
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}
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public static Date parseDate(String dateStr, String format) {
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Date date = null;
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try {
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SimpleDateFormat sdf = new SimpleDateFormat(format);
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date = sdf.parse(dateStr);
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} catch (Exception e) {
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}
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return date;
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}
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/**
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* 获取日期当天的最小时间日期,0点
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*/
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public static Date getMinTimeDateByDate(Date date) {
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if (date == null) {
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date = new Date();
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}
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String datestr = toString(date, "yyyyMMdd");
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return parseDate(datestr, "yyyyMMdd");
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}
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/**
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* 获取日期当天的最大时间日期,12点整
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*/
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public static Date getMaxTimeDateByDate(Date date) {
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if (date == null) {
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date = new Date();
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}
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String datestr = toString(date, "yyyyMMdd");
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Date d = parseDate(datestr, "yyyyMMdd");
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return new Date(d.getTime() + 24l * 60l * 60l * 1000l - 1l);
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}
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public static long subTime(Date startDate, Date endDate) {
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return endDate.getTime() - startDate.getTime();
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}
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/**
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* 获取上月第一天最早时间
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*
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* @return Date
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*/
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public static Date getLastMonthFirstDay() {
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Calendar cal_1 = Calendar.getInstance();// 获取当前日期
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cal_1.setTime(getMinTimeDateByDate(new Date()));
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cal_1.add(Calendar.MONTH, -1);
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cal_1.set(Calendar.DAY_OF_MONTH, 1);
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return cal_1.getTime();
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}
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/**
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* 获取上月最后一天最晚时间
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*
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* @return Date
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*/
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public static Date getLastMonthLastDay() {
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Calendar cale = Calendar.getInstance();
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cale.setTime(getMinTimeDateByDate(new Date()));
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cale.add(Calendar.MONTH, -1);
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cale.set(Calendar.DAY_OF_MONTH, cale.getActualMaximum(Calendar.DAY_OF_MONTH));
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return new Date(cale.getTime().getTime() + 1000l * 60l * 60l * 24l - 1l);
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}
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/**
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* 获取本月第一天最早时间
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*
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* @return Date
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*/
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public static Date getNowMonthFirstDay() {
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Calendar cal_1 = Calendar.getInstance();// 获取当前日期
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cal_1.setTime(getMinTimeDateByDate(new Date()));
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cal_1.add(Calendar.MONTH, 0);
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cal_1.set(Calendar.DAY_OF_MONTH, 1);
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return cal_1.getTime();
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}
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/**
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* 获取本月最后一天最晚时间
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*
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* @return Date
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*/
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public static Date getNowMonthLastDay() {
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Calendar cale = Calendar.getInstance();
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cale.setTime(getMinTimeDateByDate(new Date()));
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cale.set(Calendar.DAY_OF_MONTH, cale.getActualMaximum(Calendar.DAY_OF_MONTH));
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return new Date(cale.getTime().getTime() + 1000l * 60l * 60l * 24l - 1l);
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}
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/**
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* 获取当前时间变量内月份的第一天的日期
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*
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* @param changeMonthNum
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* 变动月份数。例如 -1：前一个月的最小日期 1 ：后一个月的最小日期
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* @return Date
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*/
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public static Date getOtherMonthFirstDay(int changeMonthNum) {
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Calendar cale = Calendar.getInstance();
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Date nowMonthFirstDay = getNowMonthFirstDay();
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cale.setTime(nowMonthFirstDay);
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cale.add(Calendar.MONTH, changeMonthNum);
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return cale.getTime();
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}
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/**
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* 获取本月最后一天
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*
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* @return Date
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*/
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public static Date getTheMonthLastDay(Date date) {
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if (date == null) {
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return null;
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}
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Calendar cale = Calendar.getInstance();
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cale.setTime(date);
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cale.set(Calendar.DAY_OF_MONTH, cale.getActualMaximum(Calendar.DAY_OF_MONTH));
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cale.set(Calendar.HOUR, 0);
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cale.set(Calendar.HOUR_OF_DAY, 0);
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cale.set(Calendar.MINUTE, 0);
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cale.set(Calendar.SECOND, 0);
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cale.set(Calendar.MILLISECOND, 0);
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return cale.getTime();
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}
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/**
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* 返回之前某之后的某天开始日期、结束或者当前时分秒
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*
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* @param date
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* 日期
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* @param n
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* 正数之后的某天，负数之前某天
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* @param type
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* 返回数据类型，开始00:00:00 结束 23:59:59或当
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*
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* ex :
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*
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* getOtherDay(new Date(), -1, ""); 前一天当前时分秒
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*
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* getOtherDay(new Date(), -1, "start"); 前一天开始时间00:00:00
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*
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* getOtherDay(new Date(), -1, "end"); 前一天结束时间23:59:59
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* @return
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*/
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public static Date getOtherDay(Date date, int n, String type) {
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Calendar calendar = Calendar.getInstance();
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calendar.setTime(date);
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if ("start".equals(type)) {
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calendar.set(Calendar.HOUR_OF_DAY, 0);
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calendar.set(Calendar.SECOND, 0);
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calendar.set(Calendar.MINUTE, 0);
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} else if ("end".equals(type)) {
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calendar.set(Calendar.HOUR_OF_DAY, 23);
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calendar.set(Calendar.SECOND, 59);
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calendar.set(Calendar.MINUTE, 59);
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}
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calendar.add(Calendar.DAY_OF_MONTH, n);
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date = calendar.getTime();
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return date;
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}
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public static void main(String[] args) {
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Date otherDay = getOtherDay(new Date(), -1, "");
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System.out.println(otherDay);
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// System.out.println(toString(getTheMonthLastDay(new Date()),
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// "yyyy-MM-dd HH:mm:ss"));
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// System.out.println(toString(getLastMonthLastDay(), "yyyy-MM-dd
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// HH:mm:ss"));
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// System.out.println(toString(getNowMonthFirstDay(), "yyyy-MM-dd
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// HH:mm:ss"));
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// System.out.println(toString(getNowMonthLastDay(), "yyyy-MM-dd
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// HH:mm:ss"));
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}
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}
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