发帖，计算什么时候发的java代码

public static String cntDateTime(Date dateTime){

String newDateTime="";

if(dateTime!=null){

Long ss=System.currentTimeMillis()-dateTime.getTime();

Long s=ss/1000;

if(s<=10){

newDateTime="刚刚";

}else if(s<=60){

newDateTime=s+"秒前";

}else if(s>60&&s<(60*60)){

newDateTime=s/60+"分钟前";

}else if(s>=(60*60)&&s<(60*60*24)){

Long se=DateFormater.StringToDate(DateFormater.DateToString(new Date(), "yyyy-MM-dd")+" 24:00:00", "yyyy-MM-dd HH:mm:ss").getTime();

Long sd=DateFormater.getAfterDay(DateFormater.StringToDate(DateFormater.DateToString(new Date(), "yyyy-MM-dd")+" 24:00:00", "yyyy-MM-dd HH:mm:ss"), -1).getTime();

if(dateTime.getTime()<=se&&dateTime.getTime()>sd){

newDateTime="今天"+DateFormater.DateToString(dateTime, "HH:mm");

}else{

newDateTime="昨天"+DateFormater.DateToString(dateTime, "HH:mm");;

}

}else{

int y=dateTime.getYear();

int oy=new Date().getYear();

if(y==oy){

newDateTime=DateFormater.DateToString(dateTime, "M月dd日 HH:mm");

}else{

newDateTime=DateFormater.DateToString(dateTime, "yyyy年MM月dd日 HH:mm");

}

}

}else{

newDateTime="不详";

}

return newDateTime;

}