可视化日历

Posted 2020-06-13

package chengbaoDemo;


import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
/**
 * SimpleDateFormat
 *它允许进行格式化（日期 -> 文本）、解析（文本 -> 日期） 
 *
 *可以化日历
 * 
 */
public class Test02 {
    public static void main(String[] args) {
        
        for (int i = 1; i <= 12; i++) {
            printOneMonth(2016, i);
            System.out.println("\n");
        }
         
    }
    /**
     *打印每个月的样式表<br>
     *@param   int year  
     *@param   int month
     *@param   int month 
     *@param   boolean isSearch <br>
     *        true  将要查找的天标记
     *        false 不标记
     */
    public static void printOneMonth(int year, int month, int day, boolean isSearch) {
         System.out.println(month + "月");
        //将输入数字，字符串格式化
        String dStr = String.format("%4d%02d%02d", year, month, day);
        //(1)格式化   DateFormat
        DateFormat df = new SimpleDateFormat("yyyyMMdd");
        Date d = null;
        try {
            //将字符串解析为时间
            d = df.parse(dStr);
        } catch (ParseException e) {

            e.printStackTrace();
        }
        
        
        //(2)日期字段的含义Calendar 
        Calendar c = new GregorianCalendar();
        c.setTime(d);
        //获取所要查找的那一天
        int srcDay = -1;
        if (isSearch)
            srcDay = c.get(Calendar.DAY_OF_MONTH);
         
        //本月总天数
        int days = c.getActualMaximum(Calendar.DAY_OF_MONTH);
        
        //设置日期为1号
        c.set(Calendar.DATE, 1);
        //获取1号是周几
        int dayOfWeek = c.get(Calendar.DAY_OF_WEEK);
        //打印表头
        System.out.println("日\t一\t二\t三\t四\t五\t六");
        //打印每月第一天前的空格
        for (int i = 1; i < dayOfWeek; i++) {
            System.out.print("\t");
        }
        //打印一个月的情况
        for (int i = 1; i <= days; i++) {
            //标注所要查找的那天
            if (srcDay == i) {
                System.out.print("#");
            }
            dayOfWeek = c.get(Calendar.DAY_OF_WEEK);
            System.out.print(i + "\t");
            //每到周六换行
            if (dayOfWeek == 7) {
                System.out.println();
            }
            c.add(Calendar.DATE, 1);
            
        }
        
         
 
    }
    
    
    /**
     *重载<br>
     *打印每个月的样式表<br>
     *@param   int year  
     *@param   int month
     *@param   int month 
     *@param   boolean isSearch <br>
     *        false 不标记
     */
    public static void printOneMonth(int year, int month) {
        printOneMonth(year, month, 1, false);
    }
    

}