Java日期操作类常见用法示例

import java.time.*;
public class GetDatetime
{
  public static void main(String[] args)
  {
    // 创建时间对象，获取当前时间
    LocalDateTime timePoint = LocalDateTime.now( ); // 当前时间
    System.out.println("--当前时间----");
    System.out.println(timePoint);
    System.out.println("--获取时间的各个部分----");
    System.out.println(timePoint.toLocalDate( ));
    System.out.println(timePoint.getMonth( ));
    System.out.println(timePoint.getDayOfMonth( ));
    System.out.println(timePoint.getSecond( ));
  }
}

import java.time.*;
import java.time.format.*;
public class DateFormatDemo
{
  public static void main(String[] args)
  {
    //获取当前时间
    LocalDate locDate = LocalDate.now();
    //指定格式化规则
    DateTimeFormatter dateFmt1 = DateTimeFormatter.ofPattern("dd/MM/uuuu");
    //将当前时间格式化
    String str1 = locDate.format(dateFmt1);
    System.out.println("时间格式1 : " + str1);
    DateTimeFormatter dateFmt2 = DateTimeFormatter.ofPattern("uuuu年MM月dd日");
    //将当前时间格式化
    String str2 = locDate.format(dateFmt2);
    System.out.println("时间格式2 : " + str2);
  }
}