利用VB提取HTML文件中的EMAIL地址

答案：
　　电子邮件(EMAIL)是INTERNET上应用最广泛的一种服务之一。我们每天都在使用电子邮件，有时为了宣传我们的产品、网站等，更是离不开电子邮件，这就需要收集很多的EMAIL地址。下面我们将向大家介绍用VB自编一个EMAIL地址提取器，用来提取保存在我们硬盘中的HTML文件中所包含的EMAIL地址。 

　　一 设计界面 

　　进入VB，选择“标准EXE”新建一工程，选择“工程”菜单下的“引用”，选中Microsoft scripting Runtime”，然后再选择“工程”菜单中的“部件”，在弹出的对话框中选择“Microsoft common dialog control 6.0”，在工具箱中加入通用对话框控件。接下来在默认窗体FORM1上添加三个标签控件，一个文本框控件text1，一个列表框控件LIST1，并命名为lstemail，三个命令command1~command3,其Caption属性分别设置为“提取”、“整理”、“保存”，设置完成的界面如下图所示： 


 
　　二 输入源程序 

Dim X, Y, St1, St2, tmpY As Integer 
'提取EMAIL地址子程序 
Private Sub StripEmail(FilePath As String) 
Dim tmpEmail1, tmpEmail2 As String 
Open FilePath For Input As #1 
Do Until EOF(1) 
On Error Resume Next 
Input #1, tmpEmail1 
For X = 1 To Len(tmpEmail1) 
tmpEmail2 = Mid(tmpEmail1, X, 7) 
'查找EMAIL标志 
If tmpEmail2 = "mailto:" Then 
St1 = X 
tmpY = X + 1 
For Y = 1 To Len(tmpEmail1) 
tmpEmail2 = Mid(tmpEmail1, tmpY, 1) 
If tmpEmail2 = Chr(34) Or tmpEmail2 = "?" Then 
St2 = tmpY 
tmpEmail2 = Mid(tmpEmail1, St1 + 7, ((St2 - St1) - 7)) 
If (Left(tmpEmail2, 2) <> "//") And (Left(tmpEmail2, 1) <> " ") Then 
lstEmail.AddItem tmpEmail2 
Exit For 
End If 
End If 
tmpY = tmpY + 1 
Next Y 
End If 
Next X 
Loop 
Close #1 
End Sub 
Private Sub Command1_Click() 
Dim fs As New FileSystemObject ' 建立 FileSystemObject 
Dim fd As Folder ' 定义 Folder 对象 
Dim sfd As Folder 
Set fd = fs.GetFolder(Text1) 
Command1.Enabled = False 
Screen.MousePointer = vbHourglass 
FindFile fd, "*.htm" 'Text1.Text 
Command1.Enabled = True 
Screen.MousePointer = vbDefault 
End Sub 
Sub FindFile(fd As Folder, FileName As String) 
Dim sfd As Folder, f As File 
' Part I查找该文件夹的所有文件 
For Each f In fd.Files 
If UCase(f.Name) Like UCase(FileName) Then 
Label2 = f.Path 
StripEmail (f.Path) 
lblEmail = "已查找到的地址数为: " & lstEmail.ListCount 
End If 
DoEvents 
Next 
' Part II循环查找所有子文件夹 
For Each sfd In fd.SubFolders 
FindFile sfd, FileName ' 循环查找 
Next 
End Sub 
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Private Sub Command2_Click() 
'去掉重复的EMAIL地址 
For i = 0 To lstEmail.ListCount - 1 
For X = 0 To lstEmail.ListCount - 1 
If i = X Then GoTo Nextx 
If LCase(lstEmail.List(X)) = LCase(lstEmail.List(i)) Then 
On Error Resume Next 
lstEmail.RemoveItem X 
End If 
Nextx: 
Next X 
Next i 
lblEmail = "共有" & lstEmail.ListCount & "个地址" 
End Sub 
'保存 
Private Sub Command3_Click() 
'设置文件名 
Dim strname As String 
commondialog1.Filter = "文本文件(*.txt)|*.txt" 
commondialog1.ShowSave 
If commondialog1.FileName <> "" Then 
strname = commondialog1.FileName 
Else 
strname = App.Path & "\emailaddress.txt" 
End If 
'保存文件 
Open strname For Output As #1 
On Error Resume Next 
For i = 0 To lstEmail.ListCount - 1 
Print #1, lstEmail.List(i) 
Next 
Close #1 
End Sub 

本程序在WINDOWS ME、VB6.0中文企业版中运行通过。以上程序稍加修改即可实现提取其他类型文件中的EMAIL地址。

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