当前时间

import java.sql.Timestamp; //导包
​
Timestamp nowTime = new Timestamp(System.currentTimeMillis());
System.out.println(nowTime);

输出：

2022-06-08 11:15:51.014

Long型时间戳

Long timeLong = System.currentTimeMillis();
System.out.println("timeString:" + timeLong + "\n");

输出：

1652862076686

时间戳转String

Long timeLong = System.currentTimeMillis();
SimpleDateFormat timeFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //设置格式
String timeString = timeFormat.format(timeLong);
System.out.println("timeString:" + timeString + "\n");

输出：

2022-06-08 11:15:51