时间比较代码,Java代码库,德仔网

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【Java】时间比较
作者:岸珂 / 发布于2017/10/23/ 786
时间比较
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");    
  
  
//时间格式转换  
FastDateFormat df = FastDateFormat.getInstance("yyyy-MM-dd HH:mm:ss");     
String date = df.format(java.util.Date());
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