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32 lines
990 B
32 lines
990 B
package com.whn.hellospring.utils;
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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 DateUtils {
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/**
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* 计算两个日期之间相差的天数
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*
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* @param smdate 较小的时间
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* @param bdate 较大的时间
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* @return 相差天数
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*/
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public static int daysBetween(Date smdate, Date bdate) {
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try {
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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smdate = sdf.parse(sdf.format(smdate));
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bdate = sdf.parse(sdf.format(bdate));
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Calendar cal = Calendar.getInstance();
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cal.setTime(smdate);
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long time1 = cal.getTimeInMillis();
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cal.setTime(bdate);
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long time2 = cal.getTimeInMillis();
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long between_days = (time2 - time1) / (1000 * 3600 * 24);
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return Integer.parseInt(String.valueOf(between_days));
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} catch (Exception e) {
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return -1;
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}
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}
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}
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