JS日期时间函数

http://www.cnblogs.com/zhengzhichen/archive/2008/08/25/1276086.html

日期时间脚本库方法列表

Date.prototype.isLeapYear 判断闰年
Date.prototype.Format 日期格式化
Date.prototype.DateAdd 日期计算
Date.prototype.DateDiff 比较日期差
Date.prototype.toString 日期转字符串
Date.prototype.toArray 日期分割为数组
Date.prototype.DatePart 取日期的部分信息
Date.prototype.MaxDayOfDate 取日期所在月的最大天数
Date.prototype.WeekNumOfYear 判断日期所在年的第几周
StringToDate 字符串转日期型
IsValidDate 验证日期有效性
CheckDateTime 完整日期时间检查
daysBetween 日期天数差

1 //---------------------------------------------------
2 // 判断闰年
3 //---------------------------------------------------
4 Date.prototype.isLeapYear = function()
5 {
6 return (0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0)));
7 }
8
9 //---------------------------------------------------
10 // 日期格式化
11 // 格式 YYYY/yyyy/YY/yy 表示年份
12 // MM/M 月份
13 // W/w 星期
14 // dd/DD/d/D 日期
15 // hh/HH/h/H 时间
16 // mm/m 分钟
17 // ss/SS/s/S 秒
18 //---------------------------------------------------
19 Date.prototype.Format = function(formatStr)
20 {
21 var str = formatStr;
22 var Week = ['日','一','二','三','四','五','六'];
23
24 str=str.replace(/yyyy|YYYY/,this.getFullYear());
25 str=str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100));
26
27 str=str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0' + this.getMonth());
28 str=str.replace(/M/g,this.getMonth());
29
30 str=str.replace(/w|W/g,Week[this.getDay()]);
31
32 str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate());
33 str=str.replace(/d|D/g,this.getDate());
34
35 str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours());
36 str=str.replace(/h|H/g,this.getHours());
37 str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes());
38 str=str.replace(/m/g,this.getMinutes());
39
40 str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds());
41 str=str.replace(/s|S/g,this.getSeconds());
42
43 return str;
44 }
45
46 //+---------------------------------------------------
47 //| 求两个时间的天数差日期格式为 YYYY-MM-dd
48 //+---------------------------------------------------
49 function daysBetween(DateOne,DateTwo)
50 {
51 var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ('-'));
52 var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ('-')+1);
53 var OneYear = DateOne.substring(0,DateOne.indexOf ('-'));
54
55 var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ('-'));
56 var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ('-')+1);
57 var TwoYear = DateTwo.substring(0,DateTwo.indexOf ('-'));
58
59 var cha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)- Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/86400000);
60 return Math.abs(cha);
61 }
62
63
64 //+---------------------------------------------------
65 //| 日期计算
66 //+---------------------------------------------------
67 Date.prototype.DateAdd = function(strInterval, Number) {
68 var dtTmp = this;
69 switch (strInterval) {
70 case 's' :return new Date(Date.parse(dtTmp) + (1000 * Number));
71 case 'n' :return new Date(Date.parse(dtTmp) + (60000 * Number));
72 case 'h' :return new Date(Date.parse(dtTmp) + (3600000 * Number));
73 case 'd' :return new Date(Date.parse(dtTmp) + (86400000 * Number));
74 case 'w' :return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));
75 case 'q' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number*3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
76 case 'm' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
77 case 'y' :return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
78 }
79 }
80
81 //+---------------------------------------------------
82 //| 比较日期差 dtEnd 格式为日期型或者有效日期格式字符串
83 //+---------------------------------------------------
84 Date.prototype.DateDiff = function(strInterval, dtEnd) {
85 var dtStart = this;
86 if (typeof dtEnd == 'string' )//如果是字符串转换为日期型
87 {
88 dtEnd = StringToDate(dtEnd);
89 }
90 switch (strInterval) {
91 case 's' :return parseInt((dtEnd - dtStart) / 1000);
92 case 'n' :return parseInt((dtEnd - dtStart) / 60000);
93 case 'h' :return parseInt((dtEnd - dtStart) / 3600000);
94 case 'd' :return parseInt((dtEnd - dtStart) / 86400000);
95 case 'w' :return parseInt((dtEnd - dtStart) / (86400000 * 7));
96 case 'm' :return (dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dtStart.getFullYear())*12) - (dtStart.getMonth()+1);
97 case 'y' :return dtEnd.getFullYear() - dtStart.getFullYear();
98 }
99 }
100
101 //+---------------------------------------------------
102 //| 日期输出字符串，重载了系统的toString方法
103 //+---------------------------------------------------
104 Date.prototype.toString = function(showWeek)
105 {
106 var myDate= this;
107 var str = myDate.toLocaleDateString();
108 if (showWeek)
109 {
110 var Week = ['日','一','二','三','四','五','六'];
111 str += ' 星期' + Week[myDate.getDay()];
112 }
113 return str;
114 }
115
116 //+---------------------------------------------------
117 //| 日期合法性验证
118 //| 格式为：YYYY-MM-DD或YYYY/MM/DD
119 //+---------------------------------------------------
120 function IsValidDate(DateStr)
121 {
122 var sDate=DateStr.replace(/(^/s+|/s+$)/g,''); //去两边空格;
123 if(sDate=='') return true;
124 //如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为''
125 //数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式
126 var s = sDate.replace(/[/d]{ 4,4 }[/-/]{ 1 }[/d]{ 1,2 }[/-/]{ 1 }[/d]{ 1,2 }/g,'');
127 if (s=='') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D
128 {
129 var t=new Date(sDate.replace(//-/g,'/'));
130 var ar = sDate.split(/[-/:]/);
131 if(ar[0] != t.getYear() || ar[1] != t.getMonth()+1 || ar[2] != t.getDate())
132 {
133 //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');
134 return false;
135 }
136 }
137 else
138 {
139 //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');
140 return false;
141 }
142 return true;
143 }
144
145 //+---------------------------------------------------
146 //| 日期时间检查
147 //| 格式为：YYYY-MM-DD HH:MM:SS
148 //+---------------------------------------------------
149 function CheckDateTime(str)
150 {
151 var reg = /^(/d+)-(/d{ 1,2 })-(/d{ 1,2 }) (/d{ 1,2 }):(/d{ 1,2 }):(/d{ 1,2 })$/;
152 var r = str.match(reg);
153 if(r==null)return false;
154 r[2]=r[2]-1;
155 var d= new Date(r[1],r[2],r[3],r[4],r[5],r[6]);
156 if(d.getFullYear()!=r[1])return false;
157 if(d.getMonth()!=r[2])return false;
158 if(d.getDate()!=r[3])return false;
159 if(d.getHours()!=r[4])return false;
160 if(d.getMinutes()!=r[5])return false;
161 if(d.getSeconds()!=r[6])return false;
162 return true;
163 }
164
165 //+---------------------------------------------------
166 //| 把日期分割成数组
167 //+---------------------------------------------------
168 Date.prototype.toArray = function()
169 {
170 var myDate = this;
171 var myArray = Array();
172 myArray[0] = myDate.getFullYear();
173 myArray[1] = myDate.getMonth();
174 myArray[2] = myDate.getDate();
175 myArray[3] = myDate.getHours();
176 myArray[4] = myDate.getMinutes();
177 myArray[5] = myDate.getSeconds();
178 return myArray;
179 }
180
181 //+---------------------------------------------------
182 //| 取得日期数据信息
183 //| 参数 interval 表示数据类型
184 //| y 年 m月 d日 w星期 ww周 h时 n分 s秒
185 //+---------------------------------------------------
186 Date.prototype.DatePart = function(interval)
187 {
188 var myDate = this;
189 var partStr='';
190 var Week = ['日','一','二','三','四','五','六'];
191 switch (interval)
192 {
193 case 'y' :partStr = myDate.getFullYear();break;
194 case 'm' :partStr = myDate.getMonth()+1;break;
195 case 'd' :partStr = myDate.getDate();break;
196 case 'w' :partStr = Week[myDate.getDay()];break;
197 case 'ww' :partStr = myDate.WeekNumOfYear();break;
198 case 'h' :partStr = myDate.getHours();break;
199 case 'n' :partStr = myDate.getMinutes();break;
200 case 's' :partStr = myDate.getSeconds();break;
201 }
202 return partStr;
203 }
204
205 //+---------------------------------------------------
206 //| 取得当前日期所在月的最大天数
207 //+---------------------------------------------------
208 Date.prototype.MaxDayOfDate = function()
209 {
210 var myDate = this;
211 var ary = myDate.toArray();
212 var date1 = (new Date(ary[0],ary[1]+1,1));
213 var date2 = date1.dateAdd(1,'m',1);
214 var result = dateDiff(date1.Format('yyyy-MM-dd'),date2.Format('yyyy-MM-dd'));
215 return result;
216 }
217
218 //+---------------------------------------------------
219 //| 取得当前日期所在周是一年中的第几周
220 //+---------------------------------------------------
221 Date.prototype.WeekNumOfYear = function()
222 {
223 var myDate = this;
224 var ary = myDate.toArray();
225 var year = ary[0];
226 var month = ary[1]+1;
227 var day = ary[2];
228 document.write('< script language=VBScript/> /n');
229 document.write('myDate = DateValue(''+month+'-'+day+'-'+year+'') /n');
230 document.write('result = DatePart('ww', myDate) /n');
231 document.write(' /n');
232 return result;
233 }
234
235 //+---------------------------------------------------
236 //| 字符串转成日期类型
237 //| 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd
238 //+---------------------------------------------------
239 function StringToDate(DateStr)
240 {
241
242 var converted = Date.parse(DateStr);
243 var myDate = new Date(converted);
244 if (isNaN(myDate))
245 {
246 //var delimCahar = DateStr.indexOf('/')!=-1?'/':'-';
247 var arys= DateStr.split('-');
248 myDate = new Date(arys[0],--arys[1],arys[2]);
249 }
250 return myDate;
251 }
252

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JS日期时间函数

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