java计算两个日期之间的天数，并格式化返回天小时分钟的代码片段

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateUtil {

    public static void main(String[] args) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date1 = format.parse("2012-10-11 07:18:54");
        Date date2 = format.parse("2012-12-11 09:18:44");

        String diff = diffDate(date1.getTime(), date2.getTime());

        System.out.println(diff);
    }

    /**
     * 获取两个时间的时间查 如1天2小时30分钟
     */
    public static String diffDate(long from, long to) {
        String diff = "";
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long _diff = to - from;
        if (_diff <= 0) {
            diff = "0d";
            return diff;
        }
        // 计算差多少天
        long day = _diff / nd;
        // 计算差多少小时
        long hour = _diff % nd / nh;
        // 计算差多少分钟
        long min = _diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        if (day > 0) {
            diff += day + "d ";
        }
        if (hour > 0) {
            diff += hour + "h ";
        }
        if (min > 0) {
            diff += min + "m";
        }
        return diff;
    }


}

运行截图

当然可以按自己的业务需求实现按年月日小时分钟秒的计算。