编写程序对日期进行操作

import java.util.*;
import java.sql.Timestamp;
import java.text.*;

public class TestSimpleDateFormat{
    public static void main(String[] args){
        Date now = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒");
        System.out.println(sdf.format(now));
        Calendar c = Calendar.getInstance();
        c.setTime(now);
        System.out.println(c.get(Calendar.MONTH) + 1);
        //获取当前时间
        System.out.println(System.currentTimeMillis());
        Date date = new Date();
        Calendar cal = new GregorianCalendar(TimeZone.getTimeZone("japan"));//日本时间
        //利用Timestamp将固定格式的字符串转化为Timestamp对象
        String str = "1997-10-16 10:10:10.0";
        Timestamp ts = Timestamp.valueOf(str);
        System.out.println(ts);
    }
}