dateutil.java

网上订餐系统

package com.newer.dao;

import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class DateUtil {
	public static String DateToString(Date date,Boolean isKeepTime){
		String strDate="";
		String onlyDate="yyyy年MM月dd日";
		String DateAndTime="yyyy年MM月dd日 HH时mm分ss秒";
		java.text.SimpleDateFormat sdf=null;
		if(isKeepTime){
			
			sdf=new SimpleDateFormat(onlyDate);
			
		}else{
			sdf=new SimpleDateFormat(DateAndTime);
		}
		strDate=sdf.format(date);
		return strDate;
		
	}
	public static Date strToDate(String strDate){
		String strYear=strDate.substring(0,4);
		String strMonth=strDate.substring(5,7);
		String strDay=strDate.substring(8,10);
		String strTime=strDate.substring(11);
		String [] strtime=strTime.split(":");
		String strSecond=strtime[2].substring(0,2);
		//System.out.println("stryear:"+strYear);
		int year=Integer.parseInt(strYear);
		//System.out.println("intYear:"+year);
		int month=Integer.parseInt(strMonth);
		int day=Integer.parseInt(strDay);
		int hour=Integer.parseInt(strtime[0]);
		int minute=Integer.parseInt(strtime[1]);
		int second=Integer.parseInt(strSecond);
		Date date=new Date();
		//date.setYear(year);
		Calendar cal=Calendar.getInstance();
		cal.set(Calendar.YEAR, year);
		cal.set(Calendar.MONTH, month);
		cal.set(Calendar.DAY_OF_MONTH, day);
		cal.set(Calendar.HOUR, hour);
		cal.set(Calendar.MINUTE, minute);
		cal.set(Calendar.SECOND, second);
		//System.out.println(cal.toString());
		date.setMonth(month);
		date.setDate(day);
		date.setHours(hour);
		date.setMinutes(minute);
		date.setSeconds(second);
		//System.out.println(date.toLocaleString());
		//date.setYear(arg0)
		//Date d=new Date(cal);
		return date;
	}

}