用最笨的方法实现java控制台日历打印

如果想用户自定义输入日期查询，可以通过Calendar的set方法和Scanner方法设置
Calendar类简单使用：https://blog.csdn.net/weixin_43670802/article/details/89953759

package test1.three;

import java.text.SimpleDateFormat;
import java.util.Calendar;

public class MyCalendar {
		public static void printCalendar(){
		
			//本月时长，打印变量,当前日期
			int days=0,n=1,div=0;
			
			SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月");
			Calendar now=Calendar.getInstance();
			//-------------------------------------------------
			//得到当前日期
			div=now.get(Calendar.DAY_OF_MONTH);
			//-------------------------------------------------
			//得到本月天数
			now.add(Calendar.MONTH,1);
			now.set(Calendar.DAY_OF_MONTH,1);
			now.add(Calendar.DAY_OF_MONTH,-1);
			days=now.get(Calendar.DAY_OF_MONTH);
			//-------------------------------------------------
			//当前月份日历显示
			System.out.println("			傻瓜式日历："+format.format(now.getTime()));
			System.out.println("	--------------------------------------------------");
			//-------------------------------------------------
			//设置为月初
			now.set(Calendar.DAY_OF_MONTH,1);
			//-------------------------------------------------
			//表头
			String[] week={"日","一","二","三","四","五","六"};
			//-------------------------------------------------
			//打印表头
			for(int i=0;i<week.length;i++){
				
				System.out.print("	"+week[i]);
			}
			//换行
			System.out.print("
	");
			//-------------------------------------------------
			//打印第一行
			for(int i=1;i<now.get(Calendar.DAY_OF_WEEK);i++){
				System.out.print("	");
			}
			for(int j=0;j<=7-now.get(Calendar.DAY_OF_WEEK);j++){
				//判断是否超出本月期限
				if(n<=days){
					//判断是否是当前日
					if(n==div)
					System.out.print("["+(n++)+"]");
					else
					System.out.print(n++);
				}
				System.out.print("	");
			}
			System.out.print("
	");
			
			//-------------------------------------------------
			//打印其余部分
			for(int i=0;i<days/7+1;i++){
				//7列
				for(int j=0;j<7;j++){
					//判断是否超出本月期限
					if(n<=days){
						//判断是否是当前日
						if(n==div)
						System.out.print("["+(n++)+"]");
						else
						System.out.print(n++);
					}
					
					//间距
					System.out.print("	");
				}
				//换行
				System.out.print("
	");
			}
			//-------------------------------------------------
				
				
			
			
		}		
			
			
			
			
			
		
}

另外还有好多更简便的实现方法，参考
https://blog.csdn.net/bj15114817915/article/details/62431237/
https://blog.csdn.net/madridcrls7/article/details/80270764