Java实现打印日历

实现效果如图：

实现代码：

package programlist;

import java.time.DayOfWeek;
import java.time.LocalDate;

/**
 * @BelongsProject: JavaCore
 * @BelongsPackage: programlist
 * @Classname: CalendarTest4_1
 * @Author: admin
 * @Date: 2022/6/24 15:50
 * @Description:
 */
public class CalendarTest4_1 {
    public static void main(String[] args) {
        LocalDate date = LocalDate.now();
        //获得当前的月、日
        int month = date.getMonthValue();
        int today = date.getDayOfMonth();

        date = date.minusDays(today - 1);//将date设置为这个月第一天
        DayOfWeek weekday = date.getDayOfWeek();//得到这一天（这个月第一天）是星期几
        int value = weekday.getValue();//1=Monday,...,7=Sunday

        //打印日历的主体
        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){//如果是当天，打印一个*
                System.out.print("*");
            }else {
                System.out.print(" ");
            }
            //进入到下一天
            date = date.plusDays(1);
            //每过完一周换一行
            if (date.getDayOfWeek().getValue() == 1){
                System.out.println();
            }
        }
        if (date.getDayOfWeek().getValue() != 1){
            System.out.println();
        }

    }
}