J260713/授课代码/c260727/src/course/api/date/LocalDateTest.java

package course.api.date;

import java.time.*;
import java.time.format.DateTimeFormatter;

/**
 * @author WanJl
 * @version 1.0
 * @title LocalDateTest
 * @description
 * @create 2026/7/27
 */
public class LocalDateTest {
    public static void main(String[] args) {
        // 日期类 -- yyyy-MM-dd
        //LocalDate.now() 获取当前的日期对象
        LocalDate today= LocalDate.now();
        System.out.println(today);
        LocalDate date = LocalDate.of(2018, 7, 27);
        System.out.println(date);
        //获取年份
        int year = date.getYear();
        System.out.println(year);
        //获取月份
        int monthValue = date.getMonthValue();
        System.out.println(monthValue);
        //获取日--所在月的第几天
        int dayOfMonth = date.getDayOfMonth();
        System.out.println(dayOfMonth);
        //获取日--年份的第几天
        int dayOfYear = date.getDayOfYear();
        System.out.println(dayOfYear);
        //获取星期几
        DayOfWeek dayOfWeek = date.getDayOfWeek();
        System.out.println(dayOfWeek);

        //在当前的日期加5天
        LocalDate date1 = date.plusDays(5);
        System.out.println(date1);
        //在当前的日期加5月
        LocalDate date2 = date.plusMonths(6);
        System.out.println(date2);
        //加5年
        LocalDate date3 = date.plusYears(5);
        System.out.println(date3);

        //时间类--LocalTime    HH:mm:ss.nnn
        LocalTime time = LocalTime.now();
        System.out.println(time);
        LocalTime localTime = LocalTime.of(6, 20, 31);
        System.out.println(localTime);


        // 日期+时间类
        LocalDateTime ldt = LocalDateTime.now();
        System.out.println(ldt);    //2026-07-27T16:37:02.405112700

        //格式化--DateTimeFormatter
        DateTimeFormatter formatter=DateTimeFormatter.ofPattern("yyyy年MM月dd日 HH时mm分ss秒");
        //把LocalDateTime按照指定的格式进行格式化
        String string = ldt.format(formatter);
        System.out.println(string);

        //时间加减


        //计算两个日期时间的时间差


    }
}