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js获取本月、三个月、今年的日期插件dateHelp

最近看了一些关于面向对象的知识，最近工作中在做统计查询的时候需要用到本月、近三个月、今年的日期范围，所以下面用用面向对象的思想写了一个获取日期的插件，大家可以借鉴使用。

直接通过new DateHelp就可以调用了

var myDate = new DateHelp({
date:'2015-02-01',//从此日期开始计算
format:'yyyy/MM/dd'
});

myDate.getThisMonth();
myDate.getThreeMonth();
myDate.getThisYear();

dateHelp.js插件

/**
 * 通过调用可以获取本月，近三个月，今年的日期
 * @param obj
 * @constructor
 */
function DateHelp(obj) {
    /*var obj = {
     date:'2015-02-01',//从此日期开始计算
     type:'month',//以年月日向前计算：年（year），月（month），日（day）
     value:'14',//向前计算的数值，年月日
     format:'yyyy/mm/dd'//日期格式
     }*/

    this.date = obj.date;
    this.type = obj.type;
    this.value = obj.value == undefined ? obj.value : 0;
    this.format = obj.format == undefined ? obj.format: 'yyyy/MM/dd';

    //日期和非日期格式获取年月日
    if (this.date instanceof Date){
        //处理传进来的是日期函数的

        this.year = this.date.getFullYear();
        this.month = this.date.getMonth()+1;
        this.day = this.date.getDate();
    }else{
        //处理传入的是非日期函数的

        this.year = this.date.substr(0, 4);
        this.month = this.date.substr(5, 2);
        this.day = this.date.substr(8, 2);
    }

}

DateHelp.prototype.beforeDate = function(type, value){

    var _type = type || this.type,
        _value = value || this.value,
        _year = this.year,
        _month = this.month,
        _day = this.day;

    if (_type == 'year' || _type == '年'){
        _year -= _value;
    }else if (_type == 'month' || _type == '月'){
        _year -= parseInt(_value / 12);
        _month -= _value % 12;
        if(_month <= 0){
            _year -= 1;
            _month += 12;
        }
    }else if (_type == 'day' || _type == '日'){

    }else {

    }

    var date = new Date(_year, _month - 1, _day)
    return this.formatDate(date, this.format);
}

DateHelp.prototype.formatDate = function(date,fmt){

    var o = {
        "M+" : date.getMonth()+1,                 //月份
        "d+" : date.getDate(),                    //日
        "h+" : date.getHours(),                   //小时
        "m+" : date.getMinutes(),                 //分
        "s+" : date.getSeconds(),                 //秒
        "q+" : Math.floor((date.getMonth()+3)/3), //季度
        "S"  : date.getMilliseconds()             //毫秒
    };
    if(/(y+)/.test(fmt))
        fmt=fmt.replace(RegExp.$1, (date.getFullYear()+"").substr(4 - RegExp.$1.length));
    for(var k in o)
        if(new RegExp("("+ k +")").test(fmt))
            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length)));
    return fmt;
}

DateHelp.prototype.getThisMonth = function() {

    var first = new Date(this.year, this.month - 1);
    var last = new Date(this.year, this.month, 0);

    return this.formatDate(first, this.format) + " - " + this.formatDate(last, this.format);
}

DateHelp.prototype.getThreeMonth = function() {

    return this.beforeDate('month', 3) + " - " + this.beforeDate('day', 0);
}

DateHelp.prototype.getThisYear = function() {

    var first = new Date(this.year, 0, 1);
    var last = new Date(this.year, 11, 31);

    return this.formatDate(first, this.format) + " - " + this.formatDate(last, this.format);
}


/*
//示例
var myDate = new DateHelp({
    date:'2015-02-01',//从此日期开始计算
    format:'yyyy/MM/dd'
});

console.log(myDate.getThisMonth());
console.log(myDate.getThreeMonth());
console.log(myDate.getThisYear());*/

 

html测试代码

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <script src="myJs/dateHelp.js"></script>
</head>
<body>


<script>

    var myDate = new DateHelp({
        date:new Date(),//从此日期开始计算
        format:'yyyy/MM/dd'
    });

    console.log(myDate.getThisMonth());
    console.log(myDate.getThreeMonth());
    console.log(myDate.getThisYear());
</script>
</body>
</html>

 

posted @ 2016-01-25 16:25  CangoWu  阅读(1270)  评论(0)  编辑  收藏  举报