js 字符串转日期并比较大小(附其它操作)

001

//---------------------------------------------------

002

// 判断闰年

003

//---------------------------------------------------

004

Date.prototype.isLeapYear =

function

()

005

{

006

return

(0==

this

.getYear()%4&&((

this

.getYear()%100!=0)||(

this

.getYear()%400==0)));

007

}

008

009

//---------------------------------------------------

010

// 日期格式化

011

// 格式 YYYY/yyyy/YY/yy 表示年份

012

// MM/M 月份

013

// W/w 星期

014

// dd/DD/d/D 日期

015

// hh/HH/h/H 时间

016

// mm/m 分钟

017

// ss/SS/s/S 秒

018

//---------------------------------------------------

019

Date.prototype.Format =

function

(formatStr)

020

{

021

var

str = formatStr; 

022

var

Week = [

'日'

,

'一'

,

'二'

,

'三'

,

'四'

,

'五'

,

'六'

];

023

024

str=str.replace(/yyyy|YYYY/,

this

.getFullYear());

025

str=str.replace(/yy|YY/,(

this

.getYear()% 100)>9?(

this

.getYear()% 100).toString():

'0'

+(

this

.getYear()% 100));

026

027

str=str.replace(/MM/,

this

.getMonth()>9?

this

.getMonth().toString():

'0'

+

this

.getMonth());

028

str=str.replace(/M/g,

this

.getMonth());

029

030

str=str.replace(/w|W/g,Week[

this

.getDay()]);

031

032

str=str.replace(/dd|DD/,

this

.getDate()>9?

this

.getDate().toString():

'0'

+

this

.getDate());

033

str=str.replace(/d|D/g,

this

.getDate());

034

035

str=str.replace(/hh|HH/,

this

.getHours()>9?

this

.getHours().toString():

'0'

+

this

.getHours());

036

str=str.replace(/h|H/g,

this

.getHours());

037

str=str.replace(/mm/,

this

.getMinutes()>9?

this

.getMinutes().toString():

'0'

+

this

.getMinutes());

038

str=str.replace(/m/g,

this

.getMinutes());

039

040

str=str.replace(/ss|SS/,

this

.getSeconds()>9?

this

.getSeconds().toString():

'0'

+

this

.getSeconds());

041

str=str.replace(/s|S/g,

this

.getSeconds());

042

043

return

str; 

044

}

045

046

//+---------------------------------------------------

047

//| 求两个时间的天数差 日期格式为 YYYY-MM-dd 

048

//+---------------------------------------------------

049

function

daysBetween(DateOne,DateTwo)

050

{

051

var

OneMonth = DateOne.substring(5,DateOne.lastIndexOf (

'-'

));

052

var

OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf (

'-'

)+1);

053

var

OneYear = DateOne.substring(0,DateOne.indexOf (

'-'

));

054

055

var

TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf (

'-'

));

056

var

TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf (

'-'

)+1);

057

var

TwoYear = DateTwo.substring(0,DateTwo.indexOf (

'-'

));

058

059

var

cha=((Date.parse(OneMonth+

'/'

+OneDay+

'/'

+OneYear)- Date.parse(TwoMonth+

'/'

+TwoDay+

'/'

+TwoYear))/86400000);

060

return

Math.abs(cha);

061

}

062

063

064

//+---------------------------------------------------

065

//| 日期计算

066

//+---------------------------------------------------

067

Date.prototype.DateAdd =

function

(strInterval, Number){

068

var

dtTmp =

this

;

069

switch

(strInterval){

070

case

's'

:

return

new

Date(Date.parse(dtTmp)+(1000 * Number));

071

case

'n'

:

return

new

Date(Date.parse(dtTmp)+(60000 * Number));

072

case

'h'

:

return

new

Date(Date.parse(dtTmp)+(3600000 * Number));

073

case

'd'

:

return

new

Date(Date.parse(dtTmp)+(86400000 * Number));

074

case

'w'

:

return

new

Date(Date.parse(dtTmp)+((86400000 * 7)* Number));

075

case

'q'

:

return

new

Date(dtTmp.getFullYear(), (dtTmp.getMonth())+Number*3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());

076

case

'm'

:

return

new

Date(dtTmp.getFullYear(), (dtTmp.getMonth())+Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());

077

case

'y'

:

return

new

Date((dtTmp.getFullYear()+Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());

078

}

079

}

080

081

//+---------------------------------------------------

082

//| 比较日期差 dtEnd 格式为日期型或者 有效日期格式字符串

083

//+---------------------------------------------------

084

Date.prototype.DateDiff =

function

(strInterval, dtEnd){

085

var

dtStart =

this

;

086

if

(

typeof

dtEnd ==

'string'

)

//如果是字符串转换为日期型

087

{

088

dtEnd = StringToDate(dtEnd);

089

}

090

switch

(strInterval){

091

case

's'

:

return

parseInt((dtEnd - dtStart)/ 1000);

092

case

'n'

:

return

parseInt((dtEnd - dtStart)/ 60000);

093

case

'h'

:

return

parseInt((dtEnd - dtStart)/ 3600000);

094

case

'd'

:

return

parseInt((dtEnd - dtStart)/ 86400000);

095

case

'w'

:

return

parseInt((dtEnd - dtStart)/ (86400000 * 7));

096

case

'm'

:

return

(dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dtStart.getFullYear())*12)- (dtStart.getMonth()+1);

097

case

'y'

:

return

dtEnd.getFullYear()- dtStart.getFullYear();

098

}

099

}

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

}