package com.zy.kingdee.utils;
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import com.alibaba.excel.util.StringUtils;
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import java.text.ParseException;
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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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import java.util.GregorianCalendar;
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public class ERPDateUtil {
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public static int getDiffBetweenMonths(Date date1, Date date2) {
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Calendar c1 = Calendar.getInstance();
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Calendar c2 = Calendar.getInstance();
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c1.setTime(date1);
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c2.setTime(date2);
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int result = c2.get(2) - c1.get(2);
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int month = (c2.get(1) - c1.get(1)) * 12;
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return Math.abs(result + month);
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}
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public static Date getNextMonthDate(Date date, int afterMonth) {
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Calendar calendar = Calendar.getInstance();
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calendar.setTime(date);
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calendar.set(2, calendar.get(2) + afterMonth);
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Date next = calendar.getTime();
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return next;
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}
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public static Date getFirstDate(String string) throws ParseException {
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if (StringUtils.isEmpty(string)) {
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return null;
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}
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SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
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Date date = simpleDateFormat.parse(string + "-01 00:00:00");
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return date;
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}
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public static String getNextDateStr(Date date, int afterDay) {
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Date nextDate = getNextDate(date, afterDay);
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String dateStr = getDateStr(nextDate, "yyyy-MM-dd");
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return dateStr;
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}
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public static Date getNextDate(Date date, int afterDay) {
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Calendar calendar = new GregorianCalendar();
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calendar.setTime(date);
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Integer day = Integer.valueOf(calendar.get(5));
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calendar.set(5, day.intValue() + afterDay);
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Date newDate = calendar.getTime();
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return newDate;
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}
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public static String getDateStr(Date date, String format) {
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SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);
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String s = simpleDateFormat.format(date);
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return s;
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}
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public static Date parseStrToDate(String string, String format) throws ParseException {
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SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);
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Date parse = simpleDateFormat.parse(string);
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return parse;
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}
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public static int getMonth(String string) throws ParseException {
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SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
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Date parse = simpleDateFormat.parse(string);
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int month = parse.getMonth() + 1;
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return month;
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}
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public static void main(String[] args) throws ParseException {
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Date a = getFirstDate("2018-8");
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System.out.print(a);
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}
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}
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