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实例讲解ASP抓取网上房产信息
<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta http-equiv="refresh" content="300;URL=steal_house.asp">
</head>
<body>
<%
on error resume next
\\\'
Server.ScriptTimeout = 999999
\\\'========================================================
\\\'字符编码函数
\\\'====================================================
Function BytesToBstr(body,code)
dim objstream
set objstream = Server.CreateObject("adodb.stream")
objstream.Type = 1
objstream.Mode =3
objstream.Open
objstream.Write body
objstream.Position = 0
objstream.Type = 2
objstream.Charset =code
BytesToBstr = objstream.ReadText
objstream.Close
set objstream = nothing
End Function
\\\'取行字符串在另一字符串中的出现位置
Function Newstring(wstr,strng)
Newstring=Instr(lcase(wstr),lcase(strng))
if Newstring<=0 then Newstring=Len(wstr)
End Function
\\\'替换字符串函数
function ReplaceStr(ori,str1,str2)
ReplaceStr=replace(ori,str1,str2)
end function
\\\'====================================================
function ReadXml(url,code,start,ends)
set oSend=createobject("Microsoft.XMLHTTP")
SourceCode = oSend.open ("GET",url,false)
oSend.send()
ReadXml=BytesToBstr(oSend.responseBody,code )
start=Instr(ReadXml,start)
ReadXml=mid(ReadXml,start)
ends=Instr(ReadXml,ends)
ReadXml=left(ReadXml,ends-1)
end function
function SubStr(body,start,ends)
start=Instr(body,start)
SubStr=mid(body,start+len(start)+1)
ends=Instr(SubStr,ends)
SubStr=left(SubStr,ends-1)
end function
dim getcont,NewsContent
dim url,title
url="http://www.***.com"\\\'新闻网址
getcont=ReadXml(url,"gb2312","<table class=k2 border=""0""","</table>")
getcont=RegexHtml(getcont)
dim KeyId,NewsClass,City,Position,HouseType,Level,Area,Price,Demostra
dim ContactMan,Contact
for i=2 to ubound(getcont)
response.Write(getcont(i)&"__ ")

tempLink=mid(getcont(i),instr(getcont(i),"href=""")+6,instr(getcont(i),"""
onClick")-10)
tempLink=replace(tempLink,"../","")

response.Write(i&":"&tempLink&" ")
NewsContent=ReadXml(tempLink,"gb2312","<td valign=""bottom""
width=""400"">","<hr width=""760""
noshade size=""1"" color=""#808080"">
")
NewsContent=RemoveHtml(NewsContent)
NewsContent=replace(NewsContent,VbCrLf,"")
NewsContent=replace(NewsContent,vbNewLine,"")
NewsContent=replace(NewsContent," ","")
NewsContent=replace(NewsContent," ","")
NewsContent=replace(NewsContent," ","")
NewsContent=replace(NewsContent,"n","")
NewsContent=replace(NewsContent,chr(10),"")
NewsContent=replace(NewsContent,chr(13),"")
\\\'===============get Content=======================
response.Write(NewsContent)
KeyId=SubStr(NewsContent,"列号：","信息类别：")
NewsClass=SubStr(NewsContent,"类别：","所在城市：")
City=SubStr(NewsContent,"城市：","房屋详细位置：")
Position=SubStr(NewsContent,"位置：","房屋类型：")
HouseType=SubStr(NewsContent,"类型：","楼层：")
Level=SubStr(NewsContent,"楼层：","使用面积：")
Area=SubStr(NewsContent,"面积：","房价：")
Price=SubStr(NewsContent,"房价：","其他说明：")
Demostra=SubStr(NewsContent,"说明：","联系人：")
ContactMan=SubStr(NewsContent,"联系人：","联系方法：")
Contact=SubStr(NewsContent,"联系方法：","信息来源：")
response.Write("总序列号:"&KeyId&" ")
response.Write("信息类别:"&NewsClass&" ")
response.Write("所在城市:"&City&" ")
response.Write("房屋详细位置:"&Position&" ")
response.Write("房屋类型:"&HouseType&" ")
response.Write("楼层:"&Level&" ")
response.Write("使用面积:"&Area&" ")
response.Write("房价:"&Price&" ")
response.Write("其他说明:"&Demostra&" ")
response.Write("联系人:"&ContactMan&" ")
response.Write("联系方法:"&Contact&" ")
\\\'title=RemoveHTML(aa(i))
\\\'response.Write("title:"&title)
for n=0 to application.Contents.count
if(application.Contents(n)=KeyId) then
ifexit=true
end if
next
if not ifexit then
application(time&i)=KeyId
\\\'添加到数据库
\\\'====================================================
set rs=server.CreateObject("adodb.recordset")
rs.open "select top 1 * from news order by id desc",conn,3,3
rs.addnew
rs("NewsClass")=NewsClass
rs("City")=City
rs("Position")=Position
rs("HouseType")=HouseType
rs("Level")=Level
rs("Area")=Area
rs("Price")=Price
rs("Demostra")=Demostra
rs("ContactMan")=ContactMan
rs("Contact")=Contact
rs.update
rs.close
set rs=nothing
end if
\\\'==================================================

next
function RemoveTag(body)
Set regEx = New RegExp
regEx.Pattern = "<[a].*?</[a]>"
regEx.IgnoreCase = True
regEx.Global = True
Set Matches = regEx.Execute(body)
dim i,arr(15),ifexit
i=0
j=0
For Each Match in Matches
TempStr = Match.Value
TempStr=replace(TempStr,"<td>","")
TempStr=replace(TempStr,"</td>","")
TempStr=replace(TempStr,"<tr>","")
TempStr=replace(TempStr,"</tr>","")
arr(i)=TempStr
i=i+1
if(i>=15) then
exit for
end if
Next
Set regEx=nothing
Set Matches =nothing
RemoveTag=arr

end function
function RegexHtml(body)
dim r_arr(47),r_temp
Set regEx2 = New RegExp
regEx2.Pattern ="<a.*?</a>"
regEx2.IgnoreCase = True
regEx2.Global = True
Set Matches2 = regEx2.Execute(body)
iii=0
For Each Match in Matches2

r_arr(iii)=Match.Value

iii=iii+1
Next
RegexHtml=r_arr
set regEx2=nothing
set Matches2=nothing
end function
\\\'======================================================
conn.close
set conn=nothing
%>
</body>
</html>

　　function.asp

<%
\\\'**************************************************
\\\'函数名：gotTopic
\\\'作用：截字符串，汉字一个算两个字符，英文算一个字符
\\\'参数：str ----原字符串
\\\' strlen ----截取长度
\\\'返回值：截取后的字符串
\\\'**************************************************
function gotTopic(str,strlen)
if str="" then
gotTopic=""
exit function
end if
dim l,t,c, i
str=replace(replace(replace(replace(str," "," "),""",chr(34)),">",">"),"<","<")
str=replace(str,"?","")
l=len(str)
t=0
for i=1 to l
c=Abs(Asc(Mid(str,i,1)))
if c>255 then
t=t+2
else
t=t+1
end if
if t>=strlen then
gotTopic=left(str,i) & "…"
exit for
else
gotTopic=str
end if
next
gotTopic=replace(replace(replace(replace(gotTopic," "," "),chr(34),"""),">",">"),"<","<")
end function
\\\'=========================================================
\\\'函数：RemoveHTML(strHTML)
\\\'功能：去除HTML标记
\\\'参数：strHTML --要去除HTML标记的字符串
\\\'=========================================================
Function RemoveHTML(strHTML)
Dim objRegExp, Match, Matches
Set objRegExp = New Regexp
objRegExp.IgnoreCase = True
objRegExp.Global = True
\\\'取闭合的<>
objRegExp.Pattern = "<.+?>"
\\\'进行匹配
Set Matches = objRegExp.Execute(strHTML)
\\\' 遍历匹配集合，并替换掉匹配的项目
For Each Match in Matches
strHtml=Replace(strHTML,Match.Value,"")
Next
RemoveHTML=strHTML
Set objRegExp = Nothing
set Matches=nothing
End Function
%>

　　conn.asp

<%
\\\'on error resume next
set conn=server.CreateObject("adodb.connection")
con= "driver={Microsoft Access Driver (*.mdb)};dbq=" & Server.MapPath("stest.mdb")

conn.open con
sub connclose
conn.close
set conn=nothing
end sub
%>

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