Java 實例 - 日歷表及獲取當前的年月日時間

 

---

 

package guyu.day0831;

import java.text.SimpleDateFormat;
import java.time.DayOfWeek;
import java.time.LocalDate;
import java.util.Date;

/**
 * @Author: Fred
 * @Date: 2020/8/31 9:28
 */
public class Demo01 {
    public static void main(String[] args) {

        //獲取當前的年月日時間(24小時制且區分上下午)
        System.out.println("當前時間為："+new SimpleDateFormat("yyyy-MM-dd HH:mm:ss a").format(new Date()));

        System.out.println("--------------日歷----------------");

        //日歷表
        LocalDate date = LocalDate.now(); // 獲取當前日期
        int month = date.getMonthValue(); // 獲取當前日期是幾月
        int today = date.getDayOfMonth(); // 獲取當前日期是這個月的第幾天

        date = date.minusDays(today - 1);
        DayOfWeek weekday = date.getDayOfWeek();
        int value = weekday.getValue(); // 算出來這個月的第一天是星期幾

        System.out.println(" Mon Tue Wed Thu Fri Sat Sun ");
        for (int i = 1; i < value; i++)
            System.out.print("   ");

        while (date.getMonthValue() == month) {
            System.out.printf("%3d", date.getDayOfMonth());
            if (date.getDayOfMonth() == today)
                System.out.print("*");
            else
                System.out.print(" ");

            date = date.plusDays(1);
            if (date.getDayOfWeek().getValue() == 1)
                System.out.println();
        }
        if (date.getDayOfWeek().getValue() != 1)
            System.out.println();
        System.out.println(" ");
//        System.out.println("找找加"*"的今天哦！");
    }

}

 

 

                  故嶼γ