[Java] Date, LocalDateTime 포맷팅

String stringDate = " 2011-01-18 00:00:00.0"; 

SimpleDateFormat dateFormatter = new SimpleDateFormat("yyyyy-mm-dd hh:mm:ss"); 
Date stringToDate = dateFormatter.parse(stringDate); 

SimpleDateFormat dateFormatter2 = new SimpleDateFormat("yyyyy-mm-dd");
String dateToString = dateFormatter2.format(stringToDate);

String stringDate = " 2011-01-18 00:00:00.0"; 

LocalDateTime stringToDate = LocalDateTime.parse(stringDate, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));

String dateToString = stringToDate.format(DateTimeFormatter.ofPattern("yyyy-MM-dd"));