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2021-12-06 03d550d21e473f8105c77342db14a831f41a2b41

 java110-utils/src/main/java/com/java110/utils/util/DateUtil.java

@@ -32,6 +32,7 @@
    public static final String DATE_FORMATE_STRING_J = "yyyyMMddHHmmss.SSS";
    public static final String DATE_FORMATE_STRING_K = "yyyyMMddHHmmssSSS";
    public static final String DATE_FORMATE_STRING_L = "MMdd";
    public static final String DATE_FORMATE_STRING_M = "yyyyMM";

    static {
        formats.put("yyyyMMddHHmmss", new SimpleDateFormat("yyyyMMddHHmmss"));
@@ -47,6 +48,7 @@
        formats.put("yyyyMMddHHmmss.SSS", new SimpleDateFormat("yyyyMMddHHmmss.SSS"));
        formats.put("yyyyMMddHHmmssSSS", new SimpleDateFormat("yyyyMMddHHmmssSSS"));
        formats.put("MMdd", new SimpleDateFormat("MMdd"));
        formats.put("yyyyMM", new SimpleDateFormat("yyyyMM"));
    }


@@ -350,15 +352,23 @@
    public static Date getNextMonthFirstDate() {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.add(Calendar.MONTH, 1);
        return calendar.getTime();
    }

    public static Date getFirstDate() {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        return calendar.getTime();
        Calendar curDateCal = Calendar.getInstance();
        curDateCal.set(Calendar.DAY_OF_MONTH, 1);
        curDateCal.set(Calendar.HOUR_OF_DAY, 0);
        curDateCal.set(Calendar.MINUTE, 0);
        curDateCal.set(Calendar.SECOND, 0);
        Date curDate = curDateCal.getTime();
        return curDate;
    }


    public static String getNextMonthFirstDay(String fmt) {
        String returndate = "";
@@ -405,6 +415,23 @@
        return maxDate;
    }

    public static void main(String[] args) throws ParseException {

//        SimpleDateFormat sf = new SimpleDateFormat(DateUtil.DATE_FORMATE_STRING_A);
//        Calendar c = Calendar.getInstance();
//        c.setTime(DateUtil.getDateFromString("2021-12-03",DateUtil.DATE_FORMATE_STRING_A));
//        c.add(Calendar.DAY_OF_MONTH, 125);
//        System.out.println("增加一天后日期:"+sf.format(c.getTime()));
        System.out.println( "2021-12-07".compareTo(DateUtil.getNow(DateUtil.DATE_FORMATE_STRING_B)));
    }

    public static String getAddDayString(Date date,String pattern,int days) throws ParseException {
        SimpleDateFormat sf = new SimpleDateFormat(pattern);
        Calendar c = Calendar.getInstance();
        c.setTime(date);
        c.add(Calendar.DAY_OF_MONTH, days);
        return sf.format(c.getTime());
    }

    /**
     * 在给定的日期加上或减去指定月份后的日期
@@ -421,6 +448,20 @@
        return c.getTime();
    }

    /**
     * 在给定的日期加上或减去指定天数后的日期
     *
     * @param sourceDate 原始时间
     * @param day        要调整的月份，向前为负数，向后为正数
     * @return
     */
    public static Date stepDay(Date sourceDate, int day) {
        Calendar c = Calendar.getInstance();
        c.setTime(sourceDate);
        c.add(Calendar.DATE, day);
        return c.getTime();
    }

    public static String dateTimeToDate(String dateTime) {
        String dateStr = "";
        try {
@@ -433,6 +474,7 @@
        return dateStr;
    }


    public static int getYear() {
        Date date = getCurrentDate();
        Calendar calendar = Calendar.getInstance();