ASP中一个字符串处理类加强版

以下是源代码：

<%
class StringOperations

‘’***********************************************************************
‘’‘’ @功能说明: 把字符串换为char型数组
‘’‘’ @参数说明: - str [string]: 需要转换的字符串
‘’‘’ @返回值: - [Array] Char型数组
‘’************************************************************************
public function toCharArray(byVal str)
redim charArray(len(str))
for i = 1 to len(str)
charArray(i-1) = Mid(str,i,1)
next
toCharArray = charArray
end function

‘’****************************************************************************
‘’‘’ @功能说明: 把一个数组转换成一个字符串
‘’‘’ @参数说明: - arr [Array]: 需要转换的数据
‘’‘’ @返回值: - [string] 字符串
‘’****************************************************************************
public function arrayToString(byVal arr)
for i = 0 to UBound(arr)
strObj = strObj & arr(i)
next
varrayToString = strObj
end function

‘’****************************************************************************
‘’‘’ @功能说明: 检查源字符串str是否以chars开头
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @参数说明: - chars [string]: 比较的字符/字符串
‘’‘’ @返回值: - [bool]
‘’****************************************************************************
public function startsWith(byVal str, chars)
if Left(str,len(chars)) = chars then
startsWith = true
else
startsWith = false
end if
end function

‘’****************************************************************************
‘’‘’ @功能说明: 检查源字符串str是否以chars结尾
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @参数说明: - chars [string]: 比较的字符/字符串
‘’‘’ @返回值: - [bool]
‘’****************************************************************************
public function endsWith(byVal str, chars)
if Right(str,len(chars)) = chars then
endsWith = true
else
endsWith = false
end if
end function

‘’****************************************************************************
‘’‘’ @功能说明: 复制N个字符串str
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @参数说明: - n [int]: 复制次数
‘’‘’ @返回值: - [string] 复制后的字符串
‘’****************************************************************************
public function clone(byVal str, n)
for i = 1 to n
value = value & str
next
clone = value
end function

‘’****************************************************************************
‘’‘’ @功能说明: 删除源字符串str的前N个字符
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @参数说明: - n [int]: 删除的字符个数
‘’‘’ @返回值: - [string] 删除后的字符串
‘’****************************************************************************
public function trimStart(byVal str, n)
value = Mid(str, n+1)
trimStart = value
end function

‘’****************************************************************************
‘’‘’ @功能说明: 删除源字符串str的最后N个字符串
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @参数说明: - n [int]: 删除的字符个数
‘’‘’ @返回值: - [string] 删除后的字符串
‘’****************************************************************************
public function trimEnd(byVal str, n)
value = Left(str, len(str)-n)
trimEnd = value
end function

‘’****************************************************************************
‘’‘’ @功能说明: 检查字符character是否是英文字符 A-Z or a-z
‘’‘’ @参数说明: - character [char]: 检查的字符
‘’‘’ @返回值: - [bool] 如果是英文字符,返回TRUE,反之为FALSE
‘’****************************************************************************
public function isAlphabetic(byVal character)
asciiValue = cint(asc(character))
if (65 <= asciiValue and asciiValue <= 90) or (97 <= asciiValue and asciiValue <= 122) then
isAlphabetic = true
else
isAlphabetic = false
end if
end function

‘’****************************************************************************
‘’‘’ @功能说明: 对str字符串进行大小写转换
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @返回值: - [string] 转换后的字符串
‘’****************************************************************************
public function swapCase(str)
for i = 1 to len(str)
current = mid(str, i, 1)
if isAlphabetic(current) then
high = asc(ucase(current))
low = asc(lcase(current))
sum = high + low
return = return & chr(sum-asc(current))
else
return = return & current
end if
next
swapCase = return
end function

‘’****************************************************************************
‘’‘’ @功能说明: 将源字符串str中每个单词的第一个字母转换成大写
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @返回值: - [string] 转换后的字符串
‘’****************************************************************************
public function capitalize(str)
words = split(str," ")
for i = 0 to ubound(words)
if not i = 0 then
tmp = " "
end if
tmp = tmp & ucase(left(words(i), 1)) & right(words(i), len(words(i))-1)
words(i) = tmp
next
capitalize = arrayToString(words)
end function

‘’****************************************************************************
‘’‘’ @功能说明: 将源字符Str后中的‘’过滤为‘’‘’
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @返回值: - [string] 转换后的字符串
‘’****************************************************************************
public function checkstr(Str)
If Trim(Str)="" Or IsNull(str) Then
checkstr=""
else
checkstr=Replace(Trim(Str),"‘’","‘’‘’")
end if
End function

‘’****************************************************************************
‘’‘’ @功能说明: 将字符串中的str中的HTML代码进行过滤
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @返回值: - [string] 转换后的字符串
‘’****************************************************************************
Public Function HtmlEncode(str)
If Trim(Str)="" Or IsNull(str) then
HtmlEncode=""
else
str=Replace(str,">","&gt;")
str=Replace(str,"<","&lt;")
str=Replace(str,Chr(32),"&nbsp;")
str=Replace(str,Chr(9),"&nbsp;")
str=Replace(str,Chr(34),"&quot;")
str=Replace(str,Chr(39),"&#39;")
str=Replace(str,Chr(13),"")
str=Replace(str,Chr(10) & Chr(10), "</p><p>")
str=Replace(str,Chr(10),"<br> ")
HtmlEncode=str
end if
End Function

‘’****************************************************************************
‘’‘’ @功能说明: 计算源字符串Str的长度(一个中文字符为2个字节长)
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @返回值: - [Int] 源字符串的长度
‘’****************************************************************************
Public Function strLen(Str)
If Trim(Str)="" Or IsNull(str) Then
strlen=0
else
Dim P_len,x
P_len=0
StrLen=0
P_len=Len(Trim(Str))
For x=1 To P_len
If Asc(Mid(Str,x,1))<0 Then
StrLen=Int(StrLen) + 2
Else
StrLen=Int(StrLen) + 1
End If
Next
end if
End Function

‘’****************************************************************************
‘’‘’ @功能说明: 截取源字符串Str的前LenNum个字符(一个中文字符为2个字节长)
‘’‘’ @参数说明: - str [string]: 源字符串
‘’‘’ @参数说明: - LenNum [int]: 截取的长度
‘’‘’ @返回值: - [string]: 转换后的字符串
‘’****************************************************************************
Public Function CutStr(Str,LenNum)
Dim P_num
Dim I,X
If StrLen(Str)<=LenNum Then
Cutstr=Str
Else
P_num=0
X=0
Do While Not P_num > LenNum-2
X=X+1
If Asc(Mid(Str,X,1))<0 Then
P_num=Int(P_num) + 2
Else
P_num=Int(P_num) + 1
End If
Cutstr=Left(Trim(Str),X)&"..."
Loop
End If
End Function

end class
%>

原文转自：http://www.ltesting.net