Java determines whether the date is today

java determines whether the date is the current day:

public static boolean isToday(String str, String formatStr) throws Exception{
    SimpleDateFormat format = new SimpleDateFormat(formatStr);
    Date date = null;
    try {
        date = format.parse(str);
    } catch (ParseException e) {
        logger.error("解析日期错误", e);
    }
    Calendar c1 = Calendar.getInstance();              
    c1.setTime(date);                                 
    int year1 = c1.get(Calendar.YEAR);
    int month1 = c1.get(Calendar.MONTH)+1;
    int day1 = c1.get(Calendar.DAY_OF_MONTH);     
    Calendar c2 = Calendar.getInstance(); 
    c2.setTime(new Date());
    int year2 = c2.get(Calendar.YEAR);
    int month2 = c2.get(Calendar.MONTH)+1;
    int day2 = c2.get(Calendar.DAY_OF_MONTH);   
    if(year1 == year2 && month1 == month2 && day1 == day2){
        return true;
    }
    return false;   
}

In the above code, formatStr is the date format we need to verify. For example, I need to verify whether "20161212" is the current day. , then formatStr is "yyyyMMdd".

For example, if we need to verify whether "2016-12-12" is the same day, it will be "yyyy-MM-dd". For example, if we need to verify the string of "2016/12/12", it will be " yyyy/MM/dd", and so on.

Use the constructor SimpleDateFormat(String str) of the SimpleDateFormat class in java to construct the format of the formatted date.

Format the specified date object into the specified format through the format(Date date) method String.

For more java knowledge, please pay attention to java basic tutorial.

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