Java工具类（18）—时间格式化工具类

时间格式化工具，一秒前，一分钟前，一小时前，昨天，一天前

package com.awifi.cloudnative.container.rbac.user.provider.utils;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;


public class dataFormatUtils {
   
   
   
   public static String format(Date date) {
       // 计算出相差天数
       int days = differentDays(date, new Date());
       // 同一天
       if (0 == days) {
           // 计算出时间差
           long delta = new Date().getTime() - date.getTime();
           // 小于一分钟
           if (delta < 1L * 60000L) {
               long seconds = toSeconds(delta);
               return (seconds <= 0 ? 1 : seconds) + "秒前";
           }
           // 小于一小时
           else if (delta < 1L * 3600000L) {
               long minutes = toMinutes(delta);
               return (minutes <= 0 ? 1 : minutes) + "分钟前";
           }
           // 小于24小时
           else if (delta < 24L * 3600000L) {
               long hours = toHours(delta);
               return (hours <= 0 ? 1 : hours) + "小时前";
           }
       }
       // 不同一天
       else {
           if (1 == days) {
               return "昨天";
           }
           // 几天前
           else if (3 >= days) {
               return days + "天前";
           }
       }
       // 格式化时间
       return getYmdHm(date);
   }

   
   private static long toSeconds(long date) {
       return date / 1000L;
   }

   
   private static long toMinutes(long date) {
       return toSeconds(date) / 60L;
   }

   
   private static long toHours(long date) {
       return toMinutes(date) / 60L;
   }

   
   public static String getYmdHm(Date date) {
       DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");
       return df.format(date);
   }

   
   public static int differentDays(Date oldDate, Date newDate) {
       Calendar oldCal = Calendar.getInstance();
       oldCal.setTime(oldDate);

       Calendar newCal = Calendar.getInstance();
       newCal.setTime(newDate);
       int oldDay = oldCal.get(Calendar.DAY_OF_YEAR);
       int newDay = newCal.get(Calendar.DAY_OF_YEAR);

       int oldYear = oldCal.get(Calendar.YEAR);
       int newYear = newCal.get(Calendar.YEAR);
       // 不是同一年
       if (oldYear != newYear) {
           int timeDistance = 0;
           for (int i = oldYear; i < newYear; i++) {
               //如果是闰年
               if (i % 4 == 0 && i % 100 != 0 || i % 400 == 0) {
                   timeDistance += 366;
               }
               //不是闰年
               else {
                   timeDistance += 365;
               }
           }
           return timeDistance + (newDay - oldDay);
       }
       // 是同一年
       else {
           return newDay - oldDay;
       }
   }
}