Java计算两个日期时间相差几天,几小时,几分钟等

亦凉 2022-04-13 10:53 1322阅读 0赞

**目录**

方法一：

方法二：

方法三：

java 比较时间大小

--------------------

现在是2004-03-26 13：31：40
     过去是：2004-01-02 11：30：24
    要获得两个日期差，差的形式为：XX天XX小时XX分XX秒

# 方法一： #

DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    
    try
    {
        Date d1 = df.parse("2004-03-26 13:31:40");
        Date d2 = df.parse("2004-01-02 11:30:24");
        long diff = d1.getTime() - d2.getTime();
        long days = diff / (1000 * 60 * 60 * 24);
    }
    catch (Exception e)
    {
    }

# 方法二： #

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
       java.util.Date now = df.parse("2004-03-26 13:31:40");
       java.util.Date date=df.parse("2004-01-02 11:30:24");
       long l=now.getTime()-date.getTime();
       long day=l/(24*60*60*1000);
       long hour=(l/(60*60*1000)-day*24);
       long min=((l/(60*1000))-day*24*60-hour*60);
       long s=(l/1000-day*24*60*60-hour*60*60-min*60);
       System.out.println(""+day+"天"+hour+"小时"+min+"分"+s+"秒");

# 方法三： #

SimpleDateFormat dfs = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
       java.util.Date begin=dfs.parse("2004-01-02 11:30:24");
       java.util.Date end = dfs.parse("2004-03-26 13:31:40");
       long between=(end.getTime()-begin.getTime())/1000;//除以1000是为了转换成秒
    
       long day1=between/(24*3600);
       long hour1=between%(24*3600)/3600;
       long minute1=between%3600/60;
       long second1=between%60/60;
       System.out.println(""+day1+"天"+hour1+"小时"+minute1+"分"+second1+"秒");

# java 比较时间大小 #

String s1="2008-01-25 09:12:09";
    String s2="2008-01-29 09:12:11";
    java.text.DateFormat df=new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    java.util.Calendar c1=java.util.Calendar.getInstance();
    java.util.Calendar c2=java.util.Calendar.getInstance();
    try
    {
    c1.setTime(df.parse(s1));
    c2.setTime(df.parse(s2));
    }catch(java.text.ParseException e){
    System.err.println("格式不正确");
    }
    int result=c1.compareTo(c2);
    if(result==0)
    System.out.println("c1相等c2");
    else if(result<0)
    System.out.println("c1小于c2");
    else
    System.out.println("c1大于c2");

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