JAVA算時間差

jyd63發表於2014-07-16

比如:現在是2004-03-26 13:31:40 
       過去是:2004-01-02 11:30:24 
我現在要獲得兩個日期差,差的形式為:XX天XX小時XX分XX秒 
方法一:

  1. DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");   
  2. try  
  3. {   
  4.     Date d1 = df.parse("2004-03-26 13:31:40");   
  5.     Date d2 = df.parse("2004-01-02 11:30:24");   
  6.     long diff = d1.getTime() - d2.getTime();   
  7.     long days = diff / (1000 * 60 * 60 * 24);   
  8. }   
  9. catch (Exception e)   
  10. {   
  11. }  
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:

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


   
方法三:

  1. SimpleDateFormat dfs = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");   
  2.    java.util.Date begin=dfs.parse("2004-01-02 11:30:24");   
  3.    java.util.Date end = dfs.parse("2004-03-26 13:31:40");   
  4.    long between=(end.getTime()-begin.getTime())/1000;//除以1000是為了轉換成秒   
  5.    long day1=between/(24*3600);   
  6.    long hour1=between%(24*3600)/3600;   
  7.    long minute1=between%3600/60;   
  8.    long second1=between%60/60;   
  9.    System.out.println(""+day1+"天"+hour1+"小時"+minute1+"分"+second1+"秒");  
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是為了轉換成秒
   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+"小時"+minute1+"分"+second1+"秒");


   
==================================================== 
java 比較時間大小

  1. String s1="2008-01-25 09:12:09";   
  2. String s2="2008-01-29 09:12:11";   
  3. java.text.DateFormat df=new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");   
  4. java.util.Calendar c1=java.util.Calendar.getInstance();   
  5. java.util.Calendar c2=java.util.Calendar.getInstance();   
  6. try  
  7. {   
  8. c1.setTime(df.parse(s1));   
  9. c2.setTime(df.parse(s2));   
  10. }catch(java.text.ParseException e){   
  11. System.err.println("格式不正確");   
  12. }   
  13. int result=c1.compareTo(c2);   
  14. if(result==0)   
  15. System.out.println("c1相等c2");   
  16. else if(result<0)   
  17. System.out.println("c1小於c2");   
  18. else  
  19. System.out.println("c1大於c2");  
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("格式不正確");
}
int result=c1.compareTo(c2);
if(result==0)
System.out.println("c1相等c2");
else if(result<0)
System.out.println("c1小於c2");
else
System.out.println("c1大於c2");



//時間格式轉換

  1. FastDateFormat df = FastDateFormat.getInstance("yyyy-MM-dd HH:mm:ss");   
  2. String date = df.format(java.util.Date());   
FastDateFormat df = FastDateFormat.getInstance("yyyy-MM-dd HH:mm:ss");
String date = df.format(java.util.Date()); 

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