java中获取日期 日期和字符串互转

package deng;

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

public class DateTest01 {
    public static void main(String[] args) throws Exception {
        //获取时间
        Date nowtime=new Date();
        System.out.println(nowtime);
        
        SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");
        String nowtimstr=sdf.format(nowtime);//Date类型转换为字符串
        System.out.println(nowtimstr);
        String time="2022-08-08 08:08:08 888";
        SimpleDateFormat sdf2=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");
        Date datetime=sdf2.parse(time);//字符串转化日期
        System.out.println(datetime);
    }
}