LocalDateTime remove the milliseconds

问题

I am working in java application where i am using the Java 8.

I have integrated the database(multiple database Oracle,Mysql,Postgres) and where in DB i string the created date.

the date format in DB is - 2015-07-29 16:23:28.143

I fetch this from DB and set in Localdatetime object

myObj.setCreated(rs.getTimestamp("created").toLocalDateTime());

So here the issue is i dont want to show/send the millisecond in the response. i want to show/send date like 2015-07-29 16:23:28

I tried the formatter but it fails as it giving string and i dont want change the LocalDateTime object to String as this going to cause major change in all Java application.So want to find the solution

Can anybody know any solution on this.

回答1:

Simply set them to 0:

myObj.setCreated(rs.getTimestamp("created").toLocalDateTime().withNano(0));

Sample/proof:

import java.time.LocalDateTime;

public class DateTimeSample {

  public static void main(String[] args) {
    LocalDateTime ldt = LocalDateTime.now();
    System.out.println(ldt);
    System.out.println(ldt.withNano(0));
  }
}

Output:

2015-07-30T16:29:11.684
2015-07-30T16:29:11

---

Author's note: Although this is the accepted one, Peter Lawrey's answer is IMHO preferrable because it makes the intention more clear.

回答2:

Truncate

You can drop anything less than seconds. Call LocalDateTime::truncatedTo.

ldt = ldt.truncatedTo(ChronoUnit.SECONDS);

来源：https://stackoverflow.com/questions/31726418/localdatetime-remove-the-milliseconds