Java 将日期或秒数转换为日时分秒，如：2天3小时23分32秒

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

/**
 * 将日期和秒数转换为日时分秒，如：2天3小时23分32秒
 * @author WULEI
 *
 */
public class TimeSwitch {
    
    public static void main(String[] args) {
        String time1 = secondToTime(85959);
        String time2 = dateToTime("2017/10/25 16:42:46", "yyyy/MM/dd HH:mm:ss");
        System.out.println(time1);
        System.out.println(time2);
    }
    
    /**
     * 将秒数转换为日时分秒，
     * @param second
     * @return
     */
    public static String secondToTime(long second){
        long days = second / 86400;            //转换天数
        second = second % 86400;            //剩余秒数
        long hours = second / 3600;            //转换小时
        second = second % 3600;                //剩余秒数
        long minutes = second /60;            //转换分钟
        second = second % 60;                //剩余秒数
        if(days>0){
            return days + "天" + hours + "小时" + minutes + "分" + second + "秒";
        }else{
            return hours + "小时" + minutes + "分" + second + "秒";
        }
    }
    
    /**
     * 将日期转换为日时分秒
     * @param date
     * @return
     */
    public static String dateToTime(String date, String dateStyle){
        SimpleDateFormat format = new SimpleDateFormat(dateStyle);
        try {
            Date oldDate = format.parse(date);
            long time = oldDate.getTime();                    //输入日期转换为毫秒数
            long nowTime = System.currentTimeMillis();        //当前时间毫秒数
            long second = nowTime - time;                    //二者相差多少毫秒
            second = second / 1000;                            //毫秒转换为妙
            long days = second / 86400;
            second = second % 86400;
            long hours = second / 3600;
            second = second % 3600;
            long minutes = second /60;
            second = second % 60;
            if(days>0){
                return days + "天" + hours + "小时" + minutes + "分" + second + "秒";
            }else{
                return hours + "小时" + minutes + "分" + second + "秒";
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }
}