JavaScript之Date日期对象扩展

  1 //名称：日期加法函数
  2 //参数：part(year、month、day、hour、minute、second、millisecond)
  3 //返回：Date对象
  4 Date.prototype.add = function (part, value) {
  5     if (!value || isNaN(value)) value = 0;
  6     switch (part) {
  7         case "year":
  8             this.setFullYear(this.getFullYear() + value);
  9             break;
 10         case "month":
 11             this.setMonth(this.getMonth() + value);
 12             break;
 13         case "day":
 14             this.setDate(this.getDate() + value);
 15             break;
 16         case "hour":
 17             this.setHours(this.getHours() + value);
 18             break;
 19         case "minute":
 20             this.setMinutes(this.getMinutes() + value);
 21             break;
 22         case "second":
 23             this.setSeconds(this.getSeconds() + value);
 24             break;
 25         case "millisecond":
 26             this.setMilliseconds(this.getMilliseconds() + value);
 27             break;
 28         default:
 29     }
 30     return this;
 31 };
 32 
 33 Date.prototype.addYears = function (value) {
 34     if (!value || isNaN(value)) value = 0;
 35     this.setFullYear(this.getFullYear() + value);
 36     return this;
 37 };
 38 
 39 Date.prototype.addMonths = function (value) {
 40     if (!value || isNaN(value)) value = 0;
 41     this.setMonth(this.getMonth() + value);
 42     return this;
 43 };
 44 
 45 Date.prototype.addDays = function (value) {
 46     if (!value || isNaN(value)) value = 0;
 47     this.setDate(this.getDate() + value);
 48     return this;
 49 };
 50 
 51 Date.prototype.addHours = function (value) {
 52     if (!value || isNaN(value)) value = 0;
 53     this.setHours(this.getHours() + value);
 54     return this;
 55 };
 56 
 57 Date.prototype.addMinutes = function (value) {
 58     if (!value || isNaN(value)) value = 0;
 59     this.setMinutes(this.getMinutes() + value);
 60     return this;
 61 };
 62 
 63 Date.prototype.addSeconds = function (value) {
 64     if (!value || isNaN(value)) value = 0;
 65     this.setSeconds(this.getSeconds() + value);
 66     return this;
 67 };
 68 
 69 Date.prototype.addMilliseconds = function (value) {
 70     if (!value || isNaN(value)) value = 0;
 71     this.setMilliseconds(this.getMilliseconds() + value);
 72     return this;
 73 };
 74 
 75 //名称：日期加法函数
 76 //参数：time(日期字符串，示例：12:00:00)
 77 //返回：Date对象
 78 Date.prototype.addTime = function (time) {
 79     var timeRegex = /^([0-1]?\d|2[0-3])(:[0-5]?\d){1,2}$/g;
 80     if (timeRegex.test(time)) {
 81         var value = Date.parse("1970/1/1 " + time) - Date.parse("1970/1/1");
 82         this.setMilliseconds(this.getMilliseconds() + value);
 83     }
 84     return this;
 85 };
 86 
 87 //名称：日期格式化函数
 88 //参数：format(示例：yyyy-MM-dd hh:mm:ss)、zeroize(是否补零)
 89 //返回：日期字符串
 90 Date.prototype.toCustomString = function (format, zeroize) {
 91     if (!zeroize) zeroize = false;
 92     var dy = this.getFullYear();
 93     var dM = this.getMonth() + 1;
 94     var dd = this.getDate();
 95     var dh = this.getHours();
 96     var dm = this.getMinutes();
 97     var ds = this.getSeconds();
 98     var dS = this.getMilliseconds();
 99     var orm = {
100         "y+": dy.toString(),
101         "M+": !zeroize ? dM.toString() : dM < 10 ? ‘0‘ + dM : dM.toString(),
102         "d+": !zeroize ? dd.toString() : dd < 10 ? ‘0‘ + dd : dd.toString(),
103         "h+": !zeroize ? dh.toString() : dh < 10 ? ‘0‘ + dh : dh.toString(),
104         "m+": !zeroize ? dm.toString() : dm < 10 ? ‘0‘ + dm : dm.toString(),
105         "s+": !zeroize ? ds.toString() : ds < 10 ? ‘0‘ + ds : ds.toString(),
106         "S": dS.toString()
107     };
108     for (var i in orm) {
109         var patt = new RegExp(i);
110         if (patt.test(format)) {
111             var item = orm[i];
112             var ms = format.match(patt);
113             var result = ms[0];
114             if (i === "S") {
115                 format = format.replace(result, item);
116             } else {
117                 format = format.replace(result, item.substr(item.length - result.length));
118             }
119         }
120     }
121     return format;
122 };

 1 //示例1：d1数据类型为整形，日期毫秒数
 2 var d1 = Date.now();
 3 var ret1 = new Date(d1).add("year", 2);//或者：var ret1 = new Date(d1).addYear(2);            
 4 console.log(ret1.toCustomString("yyyy-MM-dd hh:mm:ss"));
 5 //打印：2018-3-28 19:15:45
 6 
 7 //示例2：d2数据类型为字符串型，日期字符串
 8 var d2 = "2016-1-1 12:00:00";
 9 var ret2 = new Date(Date.parse(d2)).add("day", 10);//或者：var ret2 = new Date(Date.parse(d2)).addDays(10);            
10 console.log(ret2.toCustomString("yyyy/MM/dd hh时mm分ss秒", true));
11 //打印：2016/01/11 12时00分00秒
12 
13 //示例3：日期类型与时间字符串类型的运算
14 var ret3 = new Date(Date.now()).addTime("2:10:00");
15 console.log(ret3.toCustomString("yyyy-MM-dd hh:mm:ss", true));
16 //打印：2016-03-28 21:25:45