SimpleDateFormat 이용하기

SimpleDateFormatPattern.java

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class SimpleDateFormatPattern {
	
	public static String unixTimeToStrDate(String unixtime) {
		Date date = new Date(Long.parseLong(unixtime));
		DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
		return formatter.format(date);
	}

	public static Date parseStrDate(String strDate) throws ParseException {
		DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
		return formatter.parse(strDate);
	}

	public static String patternYandy(String unixtime) {
		Date date = new Date(Long.parseLong(unixtime));
		DateFormat formatter = new SimpleDateFormat("YYYY yyyy ww");
		return formatter.format(date);
	}

	public static void main(String[] args) throws ParseException {
		System.out.println(unixTimeToStrDate("1419984000000"));
		System.out.println(parseStrDate("2017-01-09"));
		
		// -------------------------------------------------------
		System.out.println("----------------------");		
		System.out.println(patternYandy("1388188800000"));	// 2013-12-28 토
		System.out.println("----------------------");
		System.out.println(patternYandy("1388275200000"));	// 2013-12-29 일
		System.out.println(patternYandy("1388361600000"));	// 2013-12-30 월
		System.out.println(patternYandy("1388448000000"));	// 2013-12-31 화
		System.out.println(patternYandy("1388534400000"));	// 2014-01-01 수
		System.out.println(patternYandy("1388620800000"));	// 2014-01-02 목
		System.out.println(patternYandy("1388707200000"));	// 2014-01-03 금
		System.out.println(patternYandy("1388793600000"));	// 2014-01-04 토
		System.out.println("----------------------");
		System.out.println(patternYandy("1419984000000"));	// 2014-12-31 토
		System.out.println(patternYandy("1420070400000"));	// 2015-01-04 토
	}
}