Common classes----DateFormat and SimpleDateFormat_ conversion between time and string

package theChildOfGod.bjxy.test;

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

public class TestDateFormat {

    public static void main(String[] args) {
        DateFormat df1 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");

        Date d1 = new Date(113213546546L);
        String str1 = df1.format(d1);//将时间对象按照格式化字符串，
                                     //转化成字符串
        System.out.println(str1);

        System.out.println("###################");

        String str2 = "1997-7-1";
        DateFormat df2= new SimpleDateFormat("yyyy,MM,dd");
        try {
            Date d2 = df2.parse(str2);
            System.out.println(d2);
        }catch(ParseException e){
            e.printStackTrace();
        }   
    }

}