java SimpleDateFormat日期与时间戳的相互转换

package com.core.test;

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

public class DateTest {

    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sdf0 = new SimpleDateFormat("yyyyMMdd");
        SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd");
        SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy年MM月dd日");
        SimpleDateFormat sdf3 = new SimpleDateFormat("ddMMyyyy");

        String time0 = "20140916";
        String time1 = "2014-09-16";
        String time2 = "2014年09月16日";
        String time3 = "16092014";

        convertStamp(sdf0, time0);
        convertStamp(sdf1, time1);
        convertStamp(sdf2, time2);
        convertStamp(sdf3, time3);

        long stamp = 1410796800000L;
        convertDate(sdf0, stamp);
        convertDate(sdf1, stamp);
        convertDate(sdf2, stamp);
        convertDate(sdf3, stamp);
    }

    // 日期转换成时间戳
    public static void convertStamp(SimpleDateFormat format, String time)throws ParseException {
        Date date = format.parse(time);
        System.out.println(date.getTime());
    }

    // 时间戳转换成日期
    public static void convertDate(SimpleDateFormat sdf, long stamp) {
        String date = sdf.format(new Date(stamp));
        System.out.println(date);
    }

}

1410796800000
1410796800000
1410796800000
1410796800000
20140916
2014-09-16
2014年09月16日
16092014