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
myDate.getThreeMonth();
myDate.getThisYear();
dateHelp.js插件
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,1);
var last = new Date(this.year,11,31);
return this.formatDate(first,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
希望本文所述对大家学习javascript程序设计有所帮助。
