JAVA 时间差距，两个时间相差多少天，时，分，秒

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package ben.util;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;/*** 时间相距* @author Ben* @version 1.0* @date 2009-10-21 16:38:51*/public class DateDistance {       /**     * 两个时间之间相差距离多少天     * @param one 时间参数 1：     * @param two 时间参数 2：     * @return 相差天数     */    public static long getDistanceDays(String str1, String str2) throws Exception{        DateFormat df = new SimpleDateFormat("yyyy-MM-dd");        Date one;        Date two;        long days=0;        try {            one = df.parse(str1);            two = df.parse(str2);            long time1 = one.getTime();            long time2 = two.getTime();            long diff ;            if(time1<time2) {                diff = time2 - time1;            } else {                diff = time1 - time2;            }            days = diff / (1000 * 60 * 60 * 24);        } catch (ParseException e) {            e.printStackTrace();        }        return days;    }       /**     * 两个时间相差距离多少天多少小时多少分多少秒     * @param str1 时间参数 1 格式：1990-01-01 12:00:00     * @param str2 时间参数 2 格式：2009-01-01 12:00:00     * @return long[] 返回值为：{天, 时, 分, 秒}     */    public static long[] getDistanceTimes(String str1, String str2) {        DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        Date one;        Date two;        long day = 0;        long hour = 0;        long min = 0;        long sec = 0;        try {            one = df.parse(str1);            two = df.parse(str2);            long time1 = one.getTime();            long time2 = two.getTime();            long diff ;            if(time1<time2) {                diff = time2 - time1;            } else {                diff = time1 - time2;            }            day = diff / (24 * 60 * 60 * 1000);            hour = (diff / (60 * 60 * 1000) - day * 24);            min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);            sec = (diff/1000-day*24*60*60-hour*60*60-min*60);        } catch (ParseException e) {            e.printStackTrace();        }        long[] times = {day, hour, min, sec};        return times;    }    /**     * 两个时间相差距离多少天多少小时多少分多少秒     * @param str1 时间参数 1 格式：1990-01-01 12:00:00     * @param str2 时间参数 2 格式：2009-01-01 12:00:00     * @return String 返回值为：xx天xx小时xx分xx秒     */    public static String getDistanceTime(String str1, String str2) {        DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        Date one;        Date two;        long day = 0;        long hour = 0;        long min = 0;        long sec = 0;        try {            one = df.parse(str1);            two = df.parse(str2);            long time1 = one.getTime();            long time2 = two.getTime();            long diff ;            if(time1<time2) {                diff = time2 - time1;            } else {                diff = time1 - time2;            }            day = diff / (24 * 60 * 60 * 1000);            hour = (diff / (60 * 60 * 1000) - day * 24);            min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);            sec = (diff/1000-day*24*60*60-hour*60*60-min*60);        } catch (ParseException e) {            e.printStackTrace();        }        return day + "天" + hour + "小时" + min + "分" + sec + "秒";    }}
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