Javascript

2007-02-26
js日期时间函数(经典＋完善＋实用)
关键字: js 日期 时间 函数
来自http://new.dlgzy.com/bbs/show.asp?id=42&bd=8&totable=1
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


js 代码

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.}
// 原文转载于网络，仅供学习。