Java 计算两个时间相差的天，时，分钟，秒

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https://blog.csdn.net/persistencegoing/article/details/84376427

第一种：

public static String getDatePoor(Date endDate, Date nowDate) {

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 = endDate.getTime() - nowDate.getTime();

// 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;

return day + "天" + hour + "小时" + min + "分钟";

}

第二种：

 /**
 * 把时间根据时、分、秒转换为时间段
 * @param  str  可选其1值{ "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm" }
 * @author String ？日前或？小时前或？分钟前？秒前
 */
public static String getTimes(Object str){
   String resultTimes = "";
   Date now;
   Date date=parseDate(str);
   now = new Date();
   long times = now.getTime() - date.getTime();
   long day = times / (24 * 60 * 60 * 1000);
   long hour = (times / (60 * 60 * 1000) - day * 24);
   long min = ((times / (60 * 1000)) - day * 24 * 60 - hour * 60);
   long sec = (times / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
   StringBuffer sb = new StringBuffer();
   if(day>0){
      sb.append(day + "天前");
   }else if (hour > 0) {
      sb.append(hour + "小时前");
   } else if (min > 0) {
      sb.append(min + "分钟前");
   } else if (sec >0){
      sb.append(sec + "秒前");
   }else if(times>=0){
      sb.append(times + "毫秒前");
   }else{
      sb.append("超前毫秒数:"+times);
   }
   resultTimes = sb.toString();
    return resultTimes;
}

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