public class DateTimeTest {
@Test
public void testSimpleDateFormat() throws ParseException {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat();
Date date = new Date();
System.out.println(date);
String format = simpleDateFormat.format(date);
System.out.println(format);
String str = "21-05-04 上午10:53";
Date date1 = simpleDateFormat.parse(str);
System.out.println(date1);
SimpleDateFormat simpleDateFormat1 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String format1 = simpleDateFormat1.format(date);
System.out.println(format1);
Date date2 = simpleDateFormat1.parse("2021-5-4 11:03:50");
System.out.println(date2);
}
}