根据年月日求当前日期是星期几

Posted 2023-02-04 叶卡捷琳堡

使用基姆拉尔森计算公式进行计算，对应的java代码如下

public void caculateWeekDay(int y,int m,int d)

    if(m == 1 || m == 2)
    
        m+=12;
        y--;
    
    int week = (d+2*m+3*(m+1)/5+y+y/4-y/100+y/400+1)%7;
    switch (week)
    
        case 0:
            System.out.println("星期日");
            break;
        case 1:
            System.out.println("星期一");
            break;
        case 2:
            System.out.println("星期二");
            break;
        case 3:
            System.out.println("星期三");
            break;
        case 4:
            System.out.println("星期四");
            break;
        case 5:
            System.out.println("星期五");
            break;
        case 6:
            System.out.println("星期六");
            break;
    

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