java代码如何获取指定时间年月日呢?

实现思路:
    使用DateTimeFormat即可将日期对象转换为指定格式的年月日

 
import org.joda.time.LocalDate;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

public class Demo {
    public static void main(String[] args) {
        DateTimeFormatter formatter = DateTimeFormat.forPattern("YYYY-MM-dd HH:mm:ss");
        LocalDate localDate = formatter.parseLocalDate("2022-01-06 16:14:23");

        System.out.println("年:" + localDate.getYearOfCentury());
        System.out.println("月:" + localDate.getMonthOfYear());
        System.out.println("日:" + localDate.getDayOfMonth());
    }
}


//获取 
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Demo {
    public static void main(String[] args) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        LocalDateTime ldt = LocalDateTime.parse("2022-01-06 16:14:23", formatter);

        System.out.println("年:" + ldt.getYear());
        System.out.println("月:" + ldt.getMonth().getValue());
        System.out.println("日: " + ldt.getDayOfMonth());
    }
}