使用模式格式化日期和时间

import java.time.LocalDate;
/*来自 
 nowjava - 时  代  Java*/

import java.time.LocalTime;

import java.time.Month;

import java.time.ZoneId;

import java.time.ZonedDateTime;

import java.time.format.DateTimeFormatter;

import java.time.temporal.Temporal;

import java.util.Locale;


public class Main {  

  public static void main(String[] args) {

    LocalDate ld = LocalDate.of(2019, Month.APRIL, 30);

    System.out.println("Formatting date:" + ld);

    format(ld, "M/d/yyyy");

    format(ld, "MM/dd/yyyy");      

    format(ld, "MMM dd, yyyy");

    format(ld, "MMMM dd, yyyy");

    format(ld, "EEEE, MMMM dd, yyyy");

    format(ld, "'Month' q 'in' QQQ");

    format(ld, "[MM-dd-yyyy][' at' HH:mm:ss]");

    /*时代Java - nowjava.com 提供*/

    LocalTime lt = LocalTime.of(16, 30, 5, 78899);

    System.out.println("\nFormatting time:" + lt);

    format(lt, "HH:mm:ss");

    format(lt, "KK:mm:ss a");

    format(lt, "[MM-dd-yyyy][' at' HH:mm:ss]");

    

    ZoneId usCentral = ZoneId.of("America/Chicago");

    ZonedDateTime zdt = ZonedDateTime.of(ld, lt, usCentral);

    System.out.println("\nFormatting zoned datetime:" + zdt);

    format(zdt, "MM/dd/yyyy HH:mm:ssXXX");

    format(zdt, "MM/dd/yyyy VV");

    format(zdt, "[MM-dd-yyyy][' at' HH:mm:ss]"