/**
* 獲取完全格式的日期格式
* @return 格式如 2020-06-30 15:15:15:015
*/
public static String getFullDateTime(){
StringBuffer sb = new StringBuffer(30);
Calendar nowtime = Calendar.getInstance();
int _year = nowtime.get(Calendar.YEAR);//獲取年數
int _month = nowtime.get(Calendar.MONTH) + 1;//獲取月數(Java中默認爲0-11)
int _day = nowtime.get(Calendar.DAY_OF_MONTH);//獲取天數
int _hour = nowtime.get(Calendar.HOUR_OF_DAY);//獲取小時
int _minute = nowtime.get(Calendar.MINUTE);//獲取分鐘
int _second = nowtime.get(Calendar.SECOND);//獲取秒數
int _millisecond = nowtime.get(Calendar.MILLISECOND);//獲取毫秒數
sb.append(_year);
sb.append("-");
if(_month < 10){
sb.append("0");
}
sb.append(_month);
sb.append("-");
if(_day < 10){
sb.append("0");
}
sb.append(_day);
sb.append(" ");
if(_hour < 10){
sb.append("0");
}
sb.append(_hour);
sb.append(":");
if(_minute < 10){
sb.append("0");
}
sb.append(_minute);
sb.append(":");
if(_second < 10){
sb.append("0");
}
sb.append(_second);
sb.append(":");
if(_millisecond < 10){
sb.append("00");
}else if(_millisecond < 100){
sb.append("0");
}
sb.append(_millisecond);
return sb.toString();
}