java 문자열 전환 시간

public class bb {  
    public static void main(String[] args) {  
        // TODO Auto-generated method stub      
        SimpleDateFormat df = new SimpleDateFormat("yyyyMMddhhmmss");  
        String dateString = "20071128175545";  
        try {  
            Date date = df.parse(dateString);  
            System.out.println(df.format(date));  
        } catch (Exception ex) {  
            System.out.println(ex.getMessage());  
        }  
    }  
  
}