[JAVA] 날짜 변환

 1. String to Date 형변환

String sDate = "2011/04/25 13:50";

Date newDate = new SimpleDateFormat("yyyyMMddHHmm").parse(sDate);
 

2. 날짜 비교

String sDate_1 = "2011/04/15 11:50";
String sDate_2 = "2011/04/25 13:50";

Date newDate_1 = new SimpleDateFormat("yyyyMMddHHmm").parse(sDate_1);
Date newDate_2 = new SimpleDateFormat("yyyyMMddHHmm").parse(sDate_2);

long ldiff = newDate_2.getTime() - newDate_1.getTime();
long ldiffDays = ldiff / (24*60*60*100);

 3. 날짜 포맷 변경

String sDate = "2011/04/25 13:50";

Date newDate = new SimpleDateFormat("yyyyMMddHHmm").parse(sDate);

// 02001.July.04 AD 12:08 PM
SimpleDataFormat sdf = new SimpleDataFormat("yyyyy.MMMMM.dd GGG hh:mm aaa");
String convDate = sdf.format(newDate);

 

Examples

The following examples show how date and time patterns are interpreted in the U.S. locale. The given date and time are 2001-07-04 12:08:56 local time in the U.S. Pacific Time time zone.

Date and Time Pattern	Result
"yyyy.MM.dd G 'at' HH:mm:ss z"	2001.07.04 AD at 12:08:56 PDT
"EEE, MMM d, ''yy"	Wed, Jul 4, '01
"h:mm a"	12:08 PM
"hh 'o''clock' a, zzzz"	12 o'clock PM, Pacific Daylight Time
"K:mm a, z"	0:08 PM, PDT
"yyyyy.MMMMM.dd GGG hh:mm aaa"	02001.July.04 AD 12:08 PM
"EEE, d MMM yyyy HH:mm:ss Z"	Wed, 4 Jul 2001 12:08:56 -0700
"yyMMddHHmmssZ"	010704120856-0700