dateutil.java

一个网上购物商城系统

package tarena.dao.pages;

import java.text.SimpleDateFormat;
import java.util.Date;
public class DateUtil {
	private static SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println(formatDateSub(new Date(), 7));
		System.out.println(formatDateSub(new Date(), 0));
	}
	
	public static Date dateSub(Date date,int days){		
		return new Date(date.getTime()-days*24*60*60*1000);
	}
	
	public static String formatDateSub(Date date,int days){
		return sdf.format(dateSub(date, days));
	}

}