如何将mili第二种格式更改为yyyy-mm-dd hh：mm：ss以插入到具有datetype colunm的mysql中

Question

I want to insert date and time to post_date column in Wordpress. The column data type is datetime yyyy-mm-dd hh:mm:ss . I want to generate first row is: 2015-01-01 01:01:01 and add 60 seconds to the next row 2015-01-01 01:02:01.

I found this code but I don't know how to convert millisecond to second format. It's print 2015-11-22 15:41:29.496, but how to get rid of ".496"? Is my data type when I insert to MySQL was formatted like: datetime? will wordpress understand it?

import java.util.*;
import java.sql.*;

long retryDate = System.currentTimeMillis();

int sec = 60;

Timestamp original = new Timestamp(retryDate);
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(original.getTime());
cal.add(Calendar.SECOND, sec);
Timestamp later = new Timestamp(cal.getTime().getTime());

System.out.println(original);
System.out.println(later);

Answer 1

Use cal.set(Calendar.MILLISECOND, 0) to clear the milliseconds.
Use new Timestamp(cal.getTimeInMillis()) to get as Timestamp .

final int sec = 60;

Calendar cal = Calendar.getInstance();
cal.set(Calendar.MILLISECOND, 0);
Timestamp original = new Timestamp(cal.getTimeInMillis());

cal.add(Calendar.SECOND, sec);
Timestamp later = new Timestamp(cal.getTimeInMillis());

System.out.println(original);
System.out.println(later);

Java 8 version using Instant :

final int sec = 60;

Instant instant = Instant.now().truncatedTo(ChronoUnit.SECONDS);
Timestamp original = Timestamp.from(instant);

instant = instant.plusSeconds(sec);
Timestamp later = Timestamp.from(instant);

System.out.println(original);
System.out.println(later);

Answer 2

Use formatter to format datetime

public static String getCurrentTimeStamp() {
    SimpleDateFormat sdfDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Date now = new Date();
    String strDate = sdfDate.format(now);
    return strDate;
}