Java 获取两个时间之间的间隔天数

 

 

import java.text.DateFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.*;

/**
     *  获取两个时间之间的间隔天数
     * @param startTimeStr  开始时间
     * @param endTimeStr    结束时间
     * @return      天数          例如2018-11-01 00:00:00至2018-11-30 23:59:59  返回为30
     */
    public static String getBetweenDays(String startTimeStr, String endTimeStr) {
        int betweenDays = 0;
        Date startTime = strToDateLong(startTimeStr);
        Date endTime = strToDateLong(endTimeStr);

        long start = startTime.getTime();
        long end = endTime.getTime();

        betweenDays = (int) (Math.abs(end - start)/(24*3600*1000));

        return String.valueOf(betweenDays + 1);
    }

    public static Date strToDateLong(String strDate) {
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        ParsePosition pos = new ParsePosition(0);
        Date strtodate = formatter.parse(strDate, pos);
        return strtodate;
    }


    public static void main(String[] args) {

        System.err.println(getBetweenDays( "2018-11-01 00:00:00", "2018-11-29 01:59:59"));
    }