（最新）Java實現從鍵盤上輸入當前年月日，輸出對應是當年第幾天代碼

package com.jidongcloud.common;

import com.sun.org.apache.bcel.internal.generic.IFEQ;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import sun.java2d.pipe.SpanIterator;

import java.util.HashMap;
import java.util.Map;
import java.util.ResourceBundle;
import java.util.Scanner;

/**
 * ClassName:Test
 * PackageName:com.jidongcloud.common
 * Description:
 *
 * @date:2020/4/29 15:53
 * @author:robin
 */
@Controller
public class Test {
  /*  @RequestMapping(value = "/toWx")
    public  String wxpay(){
       // http://112.35.63.90:8888/toWxpayRay?rechargeMoney=1
        return  "wx";
    }

    public static void main(String[] args) {
        //讀取配置文件中的私鑰
        ResourceBundle resourceBundle = ResourceBundle.getBundle("config");
        String privateKey = resourceBundle.getString("privateKey");
        System.out.println("私鑰===="+privateKey);
    }
*/

    public static void main(String[] args) {
        //統計一個字符串中某個字符出現的次數。
     /*   Map map=new HashMap<>();
        int key=0;
        //統計a出現的次數
        String robin="a,s,q,w,e,r,t,y,u,i,a,a,o,p,a,s,df,gh,j,k,l,z,x,c,v,b,n,m";
        String[] split = robin.split(",");
        for (String binbin: split) {
            System.out.println("binbin="+binbin+",");
            if(binbin.equals("a")){// equals 引用類型，重寫object的equals方法 比較的是值    ==比較的是地址
                map.put("a",binbin);
                key++;
            }
        }
        System.out.println("key=======》"+key);*/
        //2.從鍵盤上輸入當前日期，輸出對應某一年的第幾天。

        Scanner scanner = new Scanner(System.in);
        System.out.println("請輸入年：");
        int year = scanner.nextInt();
        System.out.println("請輸入月：");
        int month = scanner.nextInt();
        System.out.println("請輸入日：");
        int day = scanner.nextInt();
        int someday = getSumDays(year, month, day);
        System.out.println(year + "年" + month + "月" + day + "日" + "是" + year + "年" + "第" + someday + "天");
    }

    private static int getSumDays(int year, int month, int day) {
        // 定義統計天數的參數 sum
        int sum = 0;
        for (int j = 1; j < month; j++) {
            int days = daysByMonth(year, j);
              sum += days;
        }
         return  sum+day;
    }
    private static int daysByMonth(int year, int month) {
        switch (month) {
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                return 31;
            case 4:
            case 6:
            case 9:
            case 11:
                return 30;
            case 2:
                //閏年，返回29天
                if (leapYear(year)) {
                    return 29;
                }
                return 28;
            default:
                break;
        }
        return  0;
    }
    //判斷是閏年的方法。
    private static boolean leapYear(int year) {
        if(year % 4==0 && year % 100 !=0 || year %400==0){
            return  true;
        }
        return false;
    }
}