使用JavaScript编写万年历的程序代码
昨天，我接到的公司老司机的命令，要求我完成一个万年历，目的是想通过日历来利用ajax显示报名信息。平时不怎么重视日历的我遇到了很多麻烦，幸好在公司的一台机器上找到了问题解决的思路。虽然不知道这位sir是谁，但是我还是要感谢他，他的思路让我明白了什么是闰年，什么是小月大月，跳转月份的规则...总之，如果你看到了的话烦请您联系我一声，我会摆平所有的阻碍为你献上一卷卫生纸表达感激！
接下来就是万年历小程序的内容（使用js编写）：
1：HTML层
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>日历</title>
<link rel="stylesheet" type="text/css" href="Calendar.css">
<script type="text/javascript" src="Calendar.js"></script>
</head>
<body>
<div id="calendar" class="calendar">
<div class="prev">
<button id="prev_M">上个月</button>
</div>
<span id="month">月<span id="year">年
<div class="next">
<button id="next_M">下个月</button>
</div>
</div>
<div style="clear:both"></div>
<!--日历主体-->
<div id="calendar_weektitle"></div>
<div id="calendar_weekday"></div>
<div style="clear:both;"></div>
<!--报名信息-->
<div id="regis">● 是否可报名</div>
<div id="instalment">月份/批次</div>
</body>
</html> 2:CSS ceng
.calendar{
font-family: "-apple-system", "Helvetica Neue", "Roboto", "Segoe UI", sans-serif;
width: 490px;
text-align: center;
overflow: hidden;
}
#calendar_weekday{
width: 500px;
}
#calendar_weektitle{
width: 500px;
}
.prev{
cursor: pointer;
float: left;
/* padding-right: px;*/
}
.next{
cursor: pointer;
float: right;
/* padding-right: px;*/
}
#calendar_weekday div,#calendar_weektitle div{
border-bottom: 1px solid #cccccc;
font-size: 11px;
font-family: "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
#calendar_weekday div{
color: #adadad;
}
#calendar_weekday > div:hover{
background-color: #ffcd3c;
opacity: .5;
}
#regis,#instalment{
line-height: 35px;
font-family: "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
font-size: 14px;
width: 490px;
padding-left: 20px;
}
#regis{
background-color: #ffd96a;
height: 40px;
}
#instalment{
border-bottom: 1px solid red;
/*line-height: 30px;*/
height: 36px;
} 3:javascript ceng !important
/**
* Created by heart on 2017/4/26.
*/
window.onload = function(){
//为日历写入月份头部
function Calendar(){
var weeks = ['日', '一', '二', '三', '四', '五', '六'];
for(i = 0; i < weeks.length; i++){
var div = document.createElement('div');
div.id = 'week_' + i;
div.innerHTML = weeks[i];
div.style.width = '14%';
div.style.height = '35px';
div.style.lineHeight = div.style.height;
div.style.backgroundColor = '#ccc';
div.style.float = 'left';
div.style.textAlign = 'center';
document.getElementById('calendar_weektitle').appendChild(div);
}
alert("1");
}
//构造原型对象
Calendar.prototype = {
//取闰年函数
isLeap : function(year){
return (year % 100 !== 0 && year % 4 == 0) || (year % 400 == 0);
},
//返回本年本月的天数
getDaysNum : function(year, month) {
var num = 31; //大月
switch (month) {
case '2':
num = this.isLeap(year) ? 29 : 28;
break; //小月
case 4:
case 6:
case 9:
case 11:
num = 30;
break;
}
return num;
},
//返回本月的第一天是周几
getWeek : function(year, month){
var d = new Date();
// var m=d.getMonth()+1;
// var y=d.getYear();
d.setYear(year);
d.setMonth(month-1);
d.setDate(1);
var weeks = ['7', '1', '2', '3', '4', '5', '6'];
return weeks[d.getDay()];
},
//核心函数，写入日历
show : function(year, month){
var weekFirstDay = this.getWeek(year, month);
var dayCount = this.getDaysNum(year, month);
console.log(weekFirstDay);
//得到本月头是周几，并在前面插入空天数
if(weekFirstDay != '7'){
for(var i = 0; i < weekFirstDay; i++){
var div_1 = document.createElement('div');
div_1.style.cursor = 'pointer';
div_1.innerHTML = '';
div_1.style.width = '14%';
div_1.style.height = '40px';
// div_1.style.lineHeight = div_1.style.height / 2;
div_1.style.float = 'left';
div_1.style.textAlign = 'center';
document.getElementById('calendar_weekday').appendChild(div_1);
}
}
//得到本月的天数，按规则格式注入天数
for(i = 0; i < dayCount; i++){
var div_2 = document.createElement('div');
div_2.style.cursor = 'pointer';
div_2.id = 'day_' + year + '_' + month + '_' + (i + 1);
console.log(div_2.id);
div_2.innerHTML = i + 1 + '<br />';
div_2.style.width = '14%';
div_2.style.height = '40px';
// div_2.style.lineHeight = div_2.style.height / 2;
div_2.style.float = 'left';
div_2.style.textAlign = 'center';
document.getElementById('calendar_weekday').appendChild(div_2);
}
},
//跳转上个月，月份减一
PreMonth: function() {
this.PreDraw(new Date(this.Year, this.Month - 2, 1));
},
//跳转下个月，月份加一
NextMonth: function() {
this.PreDraw(new Date(this.Year, this.Month, 1));
},
//重绘
PreDraw: function(date) {
this.Year = date.getFullYear();
this.Month = date.getMonth() + 1;
this.Draw();
}
};
alert('2');
//对象实例化
Calen = new Calendar();
//获取本地时间
var data= new Date();
m = data.getMonth()+1;
y =data.getFullYear();
d = data.getDate();
//写入本月天数
Calen.show(y,m);
var today = document.getElementById('day_'+ y + '_'+ m + '_' + d);
today.style.backgroundColor = '#ffcd3c';
document.getElementById("year").innerHTML = y;
document.getElementById("month").innerHTML = m;
alert('3');
//跳转到下个月
document.getElementById("next_M").onclick = function(){
var div=document.getElementById("calendar_weekday");
div.innerHTML = "";
if(m > 0&&m < 12){
m += 1;
}else if(m > 1){
m = 1;
y += 1;
}else if(m == 12){
m = 1;
y += 1;
}
Calen.show(y, m);
document.getElementById("year").innerHTML = y;
document.getElementById("month").innerHTML = m;
};
//跳转到上一月
document.getElementById("prev_M").onclick = function(){
var div = document.getElementById("calendar_weekday");
div.innerHTML="";
if(m > 1 && m < 12){
m -= 1;
}else if(m <= 1){
m = 12;
y-=1;
}else if(m == 12){
m -= 1;
}
Calen.show(y, m);
document.getElementById("year").innerHTML = y;
document.getElementById("month").innerHTML = m;
};
}; 对于js程序，我使用的是javascript原型对象开发模式，个人觉得在较复杂的程序中它相对函数式模式更加可视直观。相关的细节描述已在代码的注释中标识；可能在动态样式上有所不足；可能需要在功能上有所补充；代码可取走分析使用。
相关推荐
yslfshu 2019-05-28