[api]http://java.sun.com/j2se/1.4.2/docs/api/java/text/SimpleDateFormat.html
java.lang.Object
  java.text.Format
      java.text.DateFormat
          java.text.SimpleDateFormat

//오라클에 날짜를 입력 하기 위해서
 년월일,년월일시분초 형태로 varchar2 형 날짜 형태를 얻기 위해서 만든 util클레스.
아래 표는 api에 있는 것이며, 다른 형태로 가공 하여 사용 할 수있다.
Letter 
Date or Time Component 
Presentation 
Examples 
G 
Era designator 
Text 
AD 
y 
Year 
Year 
1996; 96 
M 
Month in year 
Month 
July; Jul; 07 
w 
Week in year 
Number 
27 
W 
Week in month 
Number 
2 
D 
Day in year 
Number 
189 
d 
Day in month 
Number 
10 
F 
Day of week in month 
Number 
2 
E 
Day in week 
Text 
Tuesday; Tue 
a 
Am/pm marker 
Text 
PM 
H 
Hour in day (0-23) 
Number 
0 
k 
Hour in day (1-24) 
Number 
24 
K 
Hour in am/pm (0-11) 
Number 
0 
h 
Hour in am/pm (1-12) 
Number 
12 
m 
Minute in hour 
Number 
30 
s 
Second in minute 
Number 
55 
S 
Millisecond 
Number 
978 
z 
Time zone 
General time zone 
Pacific Standard Time; PST; GMT-08:00 

Z 
Time zone 
RFC 822 time zone 
-0800 



package LMS.UTIL.TIME;
import java.util.Date;
import java.text.*;

public class DATETIME {
 public static Date now = new Date();
 public static SimpleDateFormat sdf;
 
 //return type : 20100101
 public static String getDate_YYMMDD(){
  sdf = new SimpleDateFormat("yyyyMMdd");
  return sdf.format(sdf);
 }
 
 //return type : 201001011820 
 public static String getDate_YYMMDDHHMMSS(){
  sdf = new SimpleDateFormat("yyyyMMddHHmmss");
  return sdf.format(sdf);
 }
}