asp 模版生成页面类

模板类的实现

　　给出具体代码之前，先把主要函数列出，用过PHPLIB的朋友应该对此很熟悉了：
　　1）Public Sub set_root(ByVal Value)　设定模板默认目录
　　2）Public Sub set_file(ByVal handle,ByVal filename)　读取文件
　　3）Public Sub set_var(ByVal Name, ByVal Value, ByVal Append)　设置映射数据-替换变量
　　4）Public Sub unset_var(ByVal Name)　取消数据映射
　　5）Public Sub set_block(ByVal Parent, ByVal BlockTag, ByVal Name)　设置数据块
　　6）Public Sub set_unknowns(ByVal unknowns)　设定未指定映射的标记处理方式
　　7）Public Sub parse(ByVal Name, ByVal BlockTag, ByVal Append)　执行模板文件与数据的结合
　　8）Public Sub p(ByVal Name)　输出处理结果

实现代码：
<%
'================================================================
' CLASS NAME: kktTemplate ASP页面模板对象
' DESIGN BY : 彭国辉
' DATE: 2004-07-05
' WEBSITE: http://kacarton.yeah.net/
' BLOG: http://blog.csdn.net/nhconch
' EMAIL: [email protected]
'
' 本对象中使用了set_var、set_block等命名方法是为了兼容phplib
'文章为作者原创，转载前请先与本人联系，转载请注明文章出处、保留作者信息，谢谢支持！
'================================================================

Class kktTemplate

Private m_FileName, m_Root, m_Unknowns, m_LastError, m_HaltOnErr
Private m_ValueList, m_BlockList
Private m_RegExp
' 构造函数
Private Sub Class_Initialize
Set m_ValueList = CreateObject("Scripting.Dictionary")
Set m_BlockList = CreateObject("Scripting.Dictionary")
set m_RegExp = New RegExp
m_RegExp.IgnoreCase = True
m_RegExp.Global = True
m_FileName = ""
m_Root = ""
m_Unknowns = "remove"
m_LastError = ""
m_HaltOnErr = true
End Sub

' 析构函数
Private Sub Class_Terminate
Set m_RegExp = Nothing
Set m_BlockMatches = Nothing
Set m_ValueMatches = nothing
End Sub

Public Property Get ClassName()
ClassName = "kktTemplate"
End Property

Public Property Get Version()
Version = "1.0"
End Property

Public Sub About()
Response.Write("kktTemplate ASP页面模板类<br>" & vbCrLf &_
"程序设计：彭国辉 2004-07-05<br>" & vbCrLf &_
"个人网站：<a href='http://kacarton.yeah.net'>http://kacarton.yeah.net</a><br>" & vbCrLf &_
"电子邮件：<a href='mailto:[email protected]'>[email protected]</a><br>")
End Sub

'检查目录是否存在
Public Function FolderExist(ByVal path)
Dim fso
Set fso = CreateObject("Scripting.FileSystemObject")
FolderExist = fso.FolderExists(Server.MapPath(path))
Set fso = Nothing
End Function
'读取文件内容
Private Function LoadFile()
Dim Filename, fso, hndFile
Filename = m_Root
If Right(Filename, 1)<>"/" And Right(Filename, 1)<>"\" Then Filename = Filename & "/"
Filename = Server.MapPath(Filename & m_FileName)
Set fso = CreateObject("Scripting.FileSystemObject")
If Not fso.FileExists(Filename) Then ShowError("模板文件" & m_FileName & "不存在!")
set hndFile = fso.OpenTextFile(Filename)
LoadFile = hndFile.ReadAll
Set hndFile = Nothing
Set fso = Nothing
If LoadFile = "" Then ShowError("不能读取模板文件" & m_FileName & "或文件为空!")
End Function

'处理错误信息
Private Sub ShowError(ByVal msg)
m_LastError = msg
Response.Write "<font color=red style='font-size;14px'><b>模板错误：" & msg & "</b></font><br>"
If m_HaltOnErr Then Response.End
End Sub

'设置模板文件默认目录
'Ex: kktTemplate.set_root("/tmplate")
' kktTemplate.Root = "/tmplate"
' root = kktTemplate.get_root()
' root = kktTemplate.Root
'使用类似set_root这样的命名方法是为了兼容phplib，以下将不再重复说明
Public Sub set_root(ByVal Value)
If Not FolderExist(Value) Then ShowError(Value & "不是有效目录或目录不存在!")
m_Root = Value
End Sub
Public Function get_root()
get_root = m_Root
End Function
Public Property Let Root(ByVal Value)
set_root(Value)
End Property
Public Property Get Root()
Root = m_Root
End Property

'设置模板文件
'Ex: kktTemplate.set_file("hndTpl", "index.htm")
'本类不支持多模板文件，handle为兼容phplib而保留
Public Sub set_file(ByVal handle,ByVal filename)
m_FileName = filename
m_BlockList.Add Handle, LoadFile()
End Sub
Public Function get_file()
get_file = m_FileName
End Function
' Public Property Let File(handle, filename)
' set_file handle, filename
' End Property
' Public Property Get File()
' File = m_FileName
' End Property

'设置对未指定的标记的处理方式，有keep、remove、comment三种
Public Sub set_unknowns(ByVal unknowns)
m_Unknowns = unknowns
End Sub
Public Function get_unknowns()
get_unknowns = m_Unknowns
End Function
Public Property Let Unknowns(ByVal unknown)
m_Unknowns = unknown
End Property
Public Property Get Unknowns()
Unknowns = m_Unknowns
End Property

Public Sub set_block(ByVal Parent, ByVal BlockTag, ByVal Name)
Dim Matches
m_RegExp.Pattern = "<!--\s+BEGIN " & BlockTag & "\s+-->([\s\S.]*)<!--\s+END " & BlockTag & "\s+-->"
If Not m_BlockList.Exists(Parent) Then ShowError("未指定的块标记" & Parent)
set Matches = m_RegExp.Execute(m_BlockList.Item(Parent))
For Each Match In Matches
m_BlockList.Add BlockTag, Match.SubMatches(0)
m_BlockList.Item(Parent) = Replace(m_BlockList.Item(Parent), Match.Value, "{" & Name & "}")
Next
set Matches = nothing
End Sub

Public Sub set_var(ByVal Name, ByVal Value, ByVal Append)
Dim Val
If IsNull(Value) Then Val = "" Else Val = Value
If m_ValueList.Exists(Name) Then
If Append Then m_ValueList.Item(Name) = m_ValueList.Item(Name) & Val _
Else m_ValueList.Item(Name) = Val
Else
m_ValueList.Add Name, Value
End If
End Sub

Public Sub unset_var(ByVal Name)
If m_ValueList.Exists(Name) Then m_ValueList.Remove(Name)
End Sub

Private Function InstanceValue(ByVal BlockTag)
Dim keys, i
InstanceValue = m_BlockList.Item(BlockTag)
keys = m_ValueList.Keys
For i=0 To m_ValueList.Count-1
InstanceValue = Replace(InstanceValue, "{" & keys(i) & "}", m_ValueList.Item(keys(i)))
Next
End Function

Public Sub parse(ByVal Name, ByVal BlockTag, ByVal Append)
If Not m_BlockList.Exists(BlockTag) Then ShowError("未指定的 块标记" & Parent)
If m_ValueList.Exists(Name) Then
If Append Then m_ValueList.Item(Name) = m_ValueList.Item(Name) & InstanceValue(BlockTag) _
Else m_ValueList.Item(Name) = InstanceValue(BlockTag)
Else
m_ValueList.Add Name, InstanceValue(BlockTag)
End If
End Sub

Private Function finish(ByVal content)
Select Case m_Unknowns
Case "keep" finish = content
Case "remove"
m_RegExp.Pattern = "\{[^ \t\r\n}]+\}"
finish = m_RegExp.Replace(content, "")
Case "comment"
m_RegExp.Pattern = "\{([^ \t\r\n}]+)\}"
finish = m_RegExp.Replace(content, "<!-- Template Variable $1 undefined -->")
Case Else finish = content
End Select
End Function

Public Sub p(ByVal Name)
If Not m_ValueList.Exists(Name) Then ShowError("不存在的标记" & Name)
Response.Write(finish(m_ValueList.Item(Name)))
End Sub
End Class
%>

　　3、使用例子

　　下面举三个例子进行说明。

　　1)简单的值替换

　　模板文件为myTemple.tpl，内容：

<html><title>ASP模板简单替换</title><body>
祝贺！你赢了一辆{some_color}法拉利！
</body>

下面是ASP代码（kktTemplate.inc.asp就是上面给出的模板类）：

<!--#INCLUDE VIRTUAL="kktTemplate.inc.asp"-->
<%
dim my_color, kkt
my_color = "红色的"
set kkt = new kktTemplate '创建模板对象
kkt.set_file "hndKktTemp", "myTemple.tpl" '设置并读取模板文件myTemple.tpl
kkt.set_var "some_color", my_color, false '设置模板变量 some_color = my_color的值
kkt.parse "out", "hndKktTemp", false '模板变量 out = 处理后的文件
kkt.p "out" '输出out的内容
set kkt = nothing '销毁模板对象
%>

执行后输出为：
<html><title>ASP模板简单替换</title><body>
祝贺！你赢了一辆红色的法拉利！
</body>

2)循环块演示例子

模板文件myTemple2.tpl：
<html><title>ASP模板－块的演示</title><body>
<table cellspacing="2" border="1"><tr><td>下面的动物您喜欢哪一种</td></tr>
<!-- BEGIN AnimalList -->
<tr><td><input type="radio" name="chk">{animal}</td></tr>
<!-- END AnimalList -->
</table>
</body>

ASP代码：

<!--#INCLUDE VIRTUAL="kktTemplate.inc.asp"-->
<%
dim animal, kkt, i
animal = Array("小猪","小狗","小强")
set kkt = new kktTemplate
kkt.set_file "hndKktTemp", "myTemple2.tpl"
kkt.set_block "hndKktTemp", "AnimalList", "list"
for i=0 to UBound(animal)
kkt.set_var "animal", animal(i), false
kkt.parse "list", "AnimalList", true
next
kkt.parse "out", "hndKktTemp", false
kkt.p "out"
set kkt = nothing
%>

执行结果：

<html><title>ASP模板－块的演示</title><body>
<table cellspacing="2" border="1"><tr><td>下面的动物您喜欢哪一种</td></tr>
<tr><td><input type="radio" name="chk">小猪</td></tr>
<tr><td><input type="radio" name="chk">小狗</td></tr>
<tr><td><input type="radio" name="chk">小强</td></tr>
</table>
</body>

3)嵌套块演示

模板文件myTemple3.tpl：

<html><title>ASP模板－嵌套块演示</title>
<body><table width="400" border="1" bordercolor="#000000">
<tr><td><div align="center">{myname}测试</div></td></tr>
<tr><td>我的动植物园：</td> </tr>
<!-- BEGIN animalList -->
<tr><td>{animal}</td></tr>
<!-- BEGIN plantList -->
<tr><td>&nbsp;&nbsp;{plant}</td></tr>
<!-- END plantList -->
<!-- END animalList -->
</table>
</body>
</html>

ASP代码：

<!--#INCLUDE VIRTUAL="kktTemplate.inc.asp"-->
<%
dim my_color, kkt, myname, animal, plant
set kkt = new kktTemplate
myname = "kktTemplate block test..."
animal = array("动物", "植物")
plant = array(array("小猪","小白","小强"), array("玫瑰","向日葵"))

kkt.set_file "hndKktTemp", "myTemple3.tpl"
kkt.set_var "myname", myname, false
kkt.set_block "hndKktTemp", "animalList", "a"
kkt.set_block "animalList", "plantList", "p"

for i=0 to UBound(animal)
kkt.set_var "animal", animal(i), False
kkt.unset_var "p"
'kkt.set_var "p", "", false
for j=0 to UBound(plant(i))
kkt.set_var "plant", plant(i)(j), false
kkt.parse "p", "plantList", true
next
kkt.parse "a", "animalList", true
next
kkt.parse "out", "hndKktTemp", false
kkt.p "out"
%>

执行结果：
<html><title>ASP模板－嵌套块演示</title>
<body><table width="400" border="1" bordercolor="#000000">
<tr><td><div align="center">kktTemplate block test...测试</div></td></tr>
<tr><td>我的动植物园：</td> </tr>
<tr><td>动物</td></tr>
<tr><td>&nbsp;&nbsp;小猪</td></tr>
<tr><td>&nbsp;&nbsp;小白</td></tr>
<tr><td>&nbsp;&nbsp;小强</td></tr>
<tr><td>植物</td></tr>
<tr><td>&nbsp;&nbsp;玫瑰</td></tr>
<tr><td>&nbsp;&nbsp;向日葵</td></tr>
</table>
</body>
</html>