Java 자바 두 날짜 차이 계산 예시

/* 날짜 포멧 */
String searchStartDate = searchVO.getSearchStartDate();
String searchEndDate = searchVO.getSearchEndDate();

/* 포멧 형식 셋팅 */
SimpleDateFormat formatter = new SimpleDateFormat("yyyy.MM.dd"); 
/* 포멧 */
Date startDate = (Date) formatter.parse(searchStartDate); 
Date endDate = (Date) formatter.parse(searchEndDate);

/* 두 날짜 차이 계산 */
System.out.println((endDate.getTime() - startDate.getTime())/(1000 * 60 * 60 * 24));
int length = (int)(endDate.getTime() - startDate.getTime())/(1000 * 60 * 60 * 24);