js Calender控件使用详解

最近一直在赶项目。项目现在终于处于稳定的状态,只是修修改改。作为后台程序员的我真是苦逼啊,从web到手机端接口我都得写,杂七杂八的事情。。。这两天终于闲下来了,没事儿看了一下关于js日期的一些函数,突然想到了日历控件,于是试着写了一个,作为后台程序员的我水平有限,大家抱着学习的态度看看我写的这个例子吧。。。

首先一个常用的日期函数:Date(year,month,day)

复制代码 代码如下:


  var   date=new  Date();

获取年份

复制代码 代码如下:


   var   year=this.date.getFullYear();

获取月份,这里是月索引所以要+1

复制代码 代码如下:


   var   month=this.date.getMonth()+1;

获取当天是几号

复制代码 代码如下:


   var   day=this.date.getDate();

获取当天是周几,返回0.周日   1.周一  2.周二  3.周三  4.周四  5.周五  6.周六

复制代码 代码如下:


   var   week=this.date.getDay();

获取当月一号是周几

复制代码 代码如下:


       var getWeekDay=function(year,month,day){
            var  date=new Date(year,month,day);
            return  date.getDay();
           }
   var  weekstart=  getWeekDay(this.year, this.month-1, 1)

获取当月的天数

复制代码 代码如下:


         var  getMonthDays=function(year,month){
            var  date=new Date(year,month,0);
            return  date.getDate();
        }
        var   monthdays= this.getMonthDays(this.year,this.month);

好了,我们用到的参数就这么多,后面其实就是关于日期对应周几的一些操作和判断,动态的拼接标签,下面就直接把我写的例子发出来:

复制代码 代码如下:


<html>   
<meta  http-equiv="content-type" content="text/html;charset=utf-8">
<head>
    <style type="text/css">
td{ text-align: center;}
    </style>
    <script type="text/javascript">
window.onload=function(){
    var   Calender=function(){
        this.Init.apply(this,arguments);
    }
    Calender.prototype={
        Init:function(container,options){
            this.date=new  Date();
            this.year=this.date.getFullYear();
            this.month=this.date.getMonth()+1;
            this.day=this.date.getDate();
            this.week=this.date.getDay();
            this.weekstart=this.getWeekDay(this.year, this.month-1, 1);
            this.monthdays= this.getMonthDays(this.year,this.month);
            this.containerDiv=document.getElementById(container);
            this.options=options!=null?options:{
                border:'1px  solid green',
                width:'400px',
                height:'200px',
                backgroundColor:'lightgrey',
                fontColor:'blue'
            }
        },
        getMonthDays:function(year,month){
            var  date=new Date(year,month,0);
            return  date.getDate();
        },
        getWeekDay:function(year,month,day){
            var  date=new Date(year,month,day);
            return  date.getDay();
        },
        View:function(){
            var  tablestr='<table>';
              tablestr+='<tr><td colspan="3"></td><td>年:'+this.year+'</td><td colspan="3">月:'+this.month+'</td></tr>';
            tablestr+='<tr><td>日</td><td>一</td><td>二</td><td>三</td><td>四</td><td>五</td><td>六</td></tr>';
            var  index=1;
            //判断每月的第一天在哪个位置
            var ;
            if(this.weekstart<7)
            {
                tablestr+='<tr>';
                 for (var i = 0; i <this.weekstart; i++) {
                     tablestr+='<td></td>';
                 };
                 for (var i = 0; i < 7-this.weekstart; i++) {
                    style=this.day==(i+1)?"background-Color:green;":"";
                     index++;
                     tablestr+='<td val='+(this.year+'-'+this.month+'-'+(i+1))+'>'+(i+1)+'</td>';
                 };
                tablestr+='</tr>';
            }
            ///剩余天数对应的位置
            //判断整数行并且对应相应的位置
            var  remaindays=this.monthdays-(7-this.weekstart);
            var  row=Math.floor(remaindays%7==0?remaindays/7:((remaindays/7)+1))  ;
            var   count=Math.floor(remaindays/7);
            for (var i = 0; i < count; i++) {
                 tablestr+='<tr>';
                 for (var k = 0; k < 7; k++) {
                      style=this.day==(index+k)?"background-Color:green;":"";
                      tablestr+='<td val='+(this.year+'-'+this.month+'-'+(index+k))+'>';
                      tablestr+=index+k;
                      tablestr+='</td>';
                 };
                 tablestr+='</tr>';
                 index+=7;
            };
            //最后剩余的天数对应的位置(不能填充一周的那几天)
            var  remaincols=this.monthdays-(index-1);
            tablestr+='<tr>';
            for (var i = 0; i < remaincols; i++) {
                style=this.day==index?"background-Color:green;":"";
                tablestr+='<td val='+(this.year+'-'+this.month+'-'+(index))+'>';
                tablestr+=index;
                tablestr+='</td>';
                index++;
            };
            tablestr+='</tr>';
            tablestr+='</table>';
            return  tablestr;
        },
        Render:function(){
           var  calenderDiv=document.createElement('div');
           calenderDiv.style.border=this.options.border;
           calenderDiv.style.width=this.options.width;
           calenderDiv.style.height=this.options.height;
           calenderDiv.style.cursor='pointer';
           calenderDiv.style.backgroundColor=this.options.backgroundColor;
           // calenderDiv.style.color=this.options.fontColor;
           calenderDiv.style.color='red' ;
           calenderDiv.onclick=function(e){
                var  evt=e||window.event;
                var   target=evt.srcElement||evt.target;
                if(target&&target.getAttribute('val'))
                {
                    alert(target.getAttribute('val'));
                }
           }
            var  tablestr=this.View();
            this.tablestr=tablestr;
            calenderDiv.innerHTML=tablestr;
            var  div=document.createElement('div');
            div.style.width='auto';
            div.style.height='auto';
             div.appendChild(calenderDiv);
             ///翻页div
            var  pagerDiv=document.createElement('div');
            pagerDiv.style.width='auto';
            pagerDiv.style.height='auto';
               var  that=this;
               ///重新设置参数
            var    resetPara=function(year,month,day){
                    that.date=new  Date(year,month,day);
                    that.year=that.date.getFullYear();
                    that.month=that.date.getMonth()+1;
                    that.day=that.date.getDate();
                    that.week=that.date.getDay();
                    that.weekstart=that.getWeekDay(that.year, that.month-1, 1);
                    that.monthdays= that.getMonthDays(that.year,that.month);
            }
            //上一页
            var  preBtn=document.createElement('input');
             preBtn.type='button';
             preBtn.value='<';
              preBtn.onclick=function(){
                     that.containerDiv.removeChild(div);
                     resetPara(that.year,that.month-2,that.day);
                     that.Render();
             }
             //下一页
              var  nextBtn=document.createElement('input');
             nextBtn.type='button';
             nextBtn.value='>';
             nextBtn.onclick=function(){
                     that.containerDiv.removeChild(div);
                     resetPara(that.year,that.month,that.day);
                     that.Render();
             }
             pagerDiv.appendChild(preBtn);
             pagerDiv.appendChild(nextBtn);
             div.appendChild(pagerDiv);
             var  dropDiv=document.createElement('div');
             var    dropdivstr='';
             //选择年份
              dropdivstr+='<select>';
              for (var i = 1900; i <= 2100; i++) {
                dropdivstr+=
                i==that.year
                ?'<option  value="'+i+'" selected="true">'+i+'</option>'
                : '<option  value="'+i+'">'+i+'</option>';
              };
             dropdivstr+='</select>';
           //选择月份
            dropdivstr+='<select>';
              for (var i = 1; i <= 12; i++) {
                dropdivstr+=
                i==that.month
                ?'<option  value="'+i+'" selected="true">'+i+'</option>'
                : '<option  value="'+i+'">'+i+'</option>';
              };
             dropdivstr+='</select>';
             dropDiv.innerHTML=dropdivstr;
             div.appendChild(dropDiv);
           that.containerDiv.appendChild(div);
             ///绑定选择年份和月份的事件
             var  ddlChange=function(){
                     var  ddlYear=document.getElementById('ddlYear');
                    var  ddlMonth=document.getElementById('ddlMonth');
                    var   yearIndex=ddlYear.selectedIndex;
                    var  year=ddlYear.options[yearIndex].value;
                    var   monthIndex=ddlMonth.selectedIndex;
                    var  month=ddlMonth.options[monthIndex].value;
                    that.containerDiv.removeChild(div);
                    resetPara(year,month-1,that.day);
                    that.Render();
             }
            ddlYear.onchange=function(){
                 ddlChange();
            }
             ddlMonth.onchange=function(){
                 ddlChange();
            }
        }
    }
    var   calender=new  Calender('dvTest',{
                border:'1px  solid green',
                width:'400px',
                height:'200px',
                backgroundColor:''
                }
                );
    calender.Render();
}
    </script>
</head>
<body>
  <div></div>
</body>
</html>

代码重新做了改动,将视图的table换为了div,是为了解决IE的tableinnerHTML的只读问题。另外加了options是为了可配置性。

上面代码有简单说明,功能是最基础的,如果更深入的做可以进行扩展

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