dateutils.java

java阿里巴巴代码

package tools.util;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Date;
/**
 * Author: zywang
 * Created: 2004-2-11 13:24:52
 */
public class DateUtils {
    public static String formatDate(Calendar calendar) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
     //   SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");

        return format.format(calendar.getTime());
    }

     public static String formatDateToString(Date date) throws Exception {
        String stringdate = null;
        if (date == null) return "";
        DateFormat fm = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        stringdate = fm.format(date);

        return stringdate;
    }

    public static String formatDateToString2(Date date) throws Exception {
        String stringdate = null;
        if (date == null) return "";
        DateFormat fm = new SimpleDateFormat("HHyyyymmddMMss");
        stringdate = fm.format(date);

        return stringdate;
    }

    public static String formatDateToHour(Date date) throws Exception {
        String stringdate = null;
        if (date == null) return "";
        DateFormat fm = new SimpleDateFormat("HH");
        stringdate = fm.format(date);

        return stringdate;
    }

    public static String formatDateToStringNoTime(Date date) throws Exception {
        String stringdate = null;
        if (date == null) return "";
        DateFormat fm = new SimpleDateFormat("yyyy-MM-dd");
        stringdate = fm.format(date);

        return stringdate;
    }

    public static String formateDateToChinese(Calendar calendar) {


        try {
            SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日");
            return format.format(calendar.getTime());
        } catch (Exception e) {
            return "";
        }

    }
    public static String formateDateToChineseWK(Calendar calendar) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日 EE");
        return format.format(calendar.getTime());
    }

    public static String formateDateToNumber(Calendar calendar) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        return format.format(calendar.getTime());
    }


    public static Calendar paserStringToCalendar(String dateString){

        Calendar cal = Calendar.getInstance();
        try {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Date date = null;
        date = format.parse(dateString);
        cal.setTime(date);

        } catch (Exception e) {
            return null;
        }
        return cal;
    }
     public static Date parseFromString(String dateStr) {
        SimpleDateFormat format = new SimpleDateFormat();
        try {
            return format.parse(dateStr);
        } catch (ParseException e) {

        }
         
        return null;
    }
}