当对现有数据库的数据进行分析时,经常需要对某一部分的数据进行分析.此时,使用 1.SQL查询分析器? 但其往往不直观,查找某个关键字又需要重新执行新的SQL. 2.SQLXML模板? 但又不一定有权限建立新的虚拟目录,且某些SQL语句SQLXML模板不支持 数据拆离时也有相似问题。 尤其当不同网络,不同环境,需要重新导入数据,进行分析或拆离,困难尤为明显。 能不能有一种方法,可以将数据脱离于数据库进行分析,需要时再导入到数据库中? XML是个很好的选择! ADO本身支持数据到XML的转换,只需要对其格式进行解析,成为自己的XML文件通用格式,就可以进行本地分析 而对通用XML格式进行数据库映射,就可完成数据重新导入数据库的工作. 下面是一个ADO数据(表的基本数据)与XML数据间的相互转换的类(ASP实现),初步完成表数据的导入、导出。 通用表间关系映射(通过XSD描述),考虑之中,希望各位赐教指点,不胜感激. 一个调用类的例子: example.asp <!--#include file="transformXML.asp"--> <% Dim aSQL(1,1) Dim oXMLData '====== 连接数据库过程 ====== '获得数据库连接对象 oDbConn '====== 连接数据库过程 ====== aSQL(0,0) = "PubLable" aSQL(0,1) = "Select * from PubLabel where cLabelName like '%abc%' Order by nLabelID" aSQL(1,0) = "PubUser" aSQL(1,1) = "Select * from PubUser where cUserName like '%abc%' Order by nUserID" set oXMLData = New TransformData Call Export() 'Call Import() set oXMLData = nothing ' // 当对象属性有默认值(default())时,可以不用在赋值
Sub Export() ' // 导出数据 oXMLData.aSQlData = aSQL ' 必须 2维SQL语句数组 oXMLData.bIsSave = 1 ' default(1) 是否保存为XML文件 oXMLData.bIsOutput = 1 ' default(0) 是否显示XML数据 oXMLData.sSaveFileName = "Data.xml" ' default(当前时间加随机数) 如果保存XML数据,XML文件名称 oXMLData.sSaveFilePath = "" ' default("") 如果保存XML数据,XML文件路径(相对路径) oXMLData.sEncoding = "gb2312" ' default("gb2312") XML文件编码类型 oXMLData.Export (oDbConn) ' // 导出数据过程 IF (oXMLData.nErrCode<>0) Then ' nErrCode(错误代码)为0,运行成功 Response.Write oXMLData.GetErrExegesis(oXMLData.nErrCode) 'nErrCode(错误代码),通过方法GetErrExegesis() 获得注释 End IF End Sub Sub Import() ' // 导入数据 oXMLData.sXMLFile = "Data.xml" ' 必须 数据源XML文件(包含相对路径) oXMLData.sVacancyCols = "nLabelID" ' 必须 指定某些字段的值可以不导入(屏蔽字段) ' 格式 "nID,dDate" (以‘,’分隔字段) oXMLData.Import (oDbConn) IF (oXMLData.nErrCode=0) Then Response.Write "数据导入成功!" Else Response.Write oXMLData.GetErrExegesis(oXMLData.nErrCode) End IF End Sub %> 类的代码: TransformData.asp <% Class TransformData '***************************************************** ' Copyright (c) 2003 ' 创 建 人 : moonpiazza ' 日 期 : 2003.5.21 ' 描 述 : ADO数据与XML数据间的转换(ASP实现) ' 版 本 : 1.0 ' 功 能 : ADO数据(表的基本数据)与XML数据间的相互转换 ' 待 改 进 : 表间数据的关联性(通用),数据量大时速度问题 ' ' 版 权 : 欢迎改进,翻版不究 :_) ' '***************************************************** '***************************************************** ' 公共方法: Export, Import, GetErrExegesis '*****************************************************
'============================= 公共变量 End ============================= Private m_oXMLDOM Private m_oXSLDOM '============================= 公共变量 Begin ============================= '============================= 错误代码定义 Begin ============================= Private m_nErrCode_NotArray Private m_nErrCode_XMLDOM Private m_nErrCode_ReadData Private m_nErrCode_WriteData Private m_nErrCode_Save Private m_nErrCode_EnsFile Private m_nErrCode_ErrFile '============================= 错误代码定义 End ============================= '============================= 属性定义 Begin ============================= Private m_aSQlData Private m_bIsSave Private m_bIsOutput Private m_sSaveFileName Private m_sSaveFilePath Private m_sXMLFile Private m_sVacancyCols Private m_nErrCode Private m_sEncoding Private m_sImportSQL '***************************************************** ' 属性: aSQlData ' 状态: 可写 ' 类型: 2维数组 ' 描述: SQL语句数组,1维是表名称,2维是相应SQL语句 '***************************************************** Public Property Let aSQlData(ByRef p_aSQlData) m_aSQlData = p_aSQlData End Property '***************************************************** ' 属性: bIsSave ' 状态: 可写 ' 类型: 数字(0,1) default(1) ' 描述: 导出数据时,是否保存为XML文件 '***************************************************** Public Property Let bIsSave(ByRef p_bIsSave) m_bIsSave = Cint(p_bIsSave) End Property
'***************************************************** ' 属性: bIsOutput ' 状态: 可写 ' 类型: 数字(0,1) default(0) ' 描述: 导出数据时,是否显示XML数据 '***************************************************** Public Property Let bIsOutput(ByRef p_bIsOutput) m_bIsOutput = Cint(p_bIsOutput) End Property
'***************************************************** ' 属性: sSaveFileName ' 状态: 可写,可读 ' 类型: 字符串 default(GetRndFileName()) ' 描述: 导出数据时,如果保存XML数据,XML文件名称 '***************************************************** Public Property Let sSaveFileName(ByRef p_sSaveFileName) m_sSaveFileName = p_sSaveFileName End Property
Public Property Get sSaveFileName() sSaveFileName = m_sSaveFileName End Property '***************************************************** ' 属性: sSaveFilePath ' 状态: 可写,可读 ' 类型: 字符串 default("") ' 描述: 导出数据时,如果保存XML数据,XML文件路径(相对路径) '***************************************************** Public Property Let sSaveFilePath(ByRef p_sSaveFilePath) m_sSaveFilePath = p_sSaveFilePath End Property
Public Property Get sSaveFilePath() sSaveFilePath = m_sSaveFilePath End Property '***************************************************** ' 属性: sXMLFile ' 状态: 可写 ' 类型: 字符串 ' 描述: 导入数据时,数据源XML文件(包含相对路径) '***************************************************** Public Property Let sXMLFile(ByRef p_sXMLFile) m_sXMLFile = p_sXMLFile End Property
'***************************************************** ' 属性: sVacancyCols ' 状态: 可写 ' 类型: 字符串 default("") ' 格式 "nID,dDate" (以‘,’分隔字段) ' 描述: 导入数据时,指定某些字段的值可以不导入(屏蔽字段) '***************************************************** Public Property Let sVacancyCols(ByRef p_sVacancyCols) m_sVacancyCols = "," & p_sVacancyCols & "," End Property
'***************************************************** ' 属性: nErrCode ' 状态: 可读 ' 类型: 数字 default(0) ' 描述: 错误代码,可通过方法GetErrExegesis(ByRef p_nErrCode) 获得注释 '***************************************************** Public Property Get nErrCode() nErrCode = m_nErrCode End Property
'***************************************************** ' 属性: sEncoding ' 状态: 可写 ' 类型: 字符串 default("gb2312") ' 描述: XML文件编码类型 '***************************************************** Public Property Let sEncoding(ByRef p_sEncoding) m_sEncoding = p_sEncoding End Property
'***************************************************** ' 属性: sImportSQL ' 状态: 可读 ' 类型: 字符串 default("gb2312") ' 描述: 导入数据时,生成的SQL语句 '***************************************************** Public Property Get sImportSQL() sImportSQL = m_sImportSQL End Property '============================= 属性定义 End =============================
'***************************************************** ' 初始化类 '***************************************************** Private Sub Class_Initialize() Server.ScriptTimeout = 1000 m_nErrCode_NotErr = 0 m_nErrCode_NotArray = 1 m_nErrCode_XMLDOM = 2 m_nErrCode_ReadData = 3 m_nErrCode_WriteData= 4 m_nErrCode_Save = 5 m_nErrCode_EnsFile = 6 m_nErrCode_ErrFile = 7 m_bIsSave = 1 m_bIsOutput = 0 m_sSaveFilePath = "" m_sSaveFileName = "" m_sXMLFile = "" m_sVacancyCols = "" m_nErrCode = m_nErrCode_NotErr m_sEncoding = "gb2312"
End Sub '***************************************************** ' 注销类 '***************************************************** Private Sub Class_Terminate() Set m_oXMLDOM = Nothing Set m_oXSLDOM = Nothing End Sub
'============================= 数据导出 Begin =============================
'***************************************************** ' 过程: Export(ByRef p_oDbConn) ' 描述: 导出数据 ' 参数: ' p_oDbConn: 数据库连接对象 ' '***************************************************** Public Sub Export(ByRef p_oDbConn) Dim nI, nMaxI Dim sTableName, sSQL Dim sDataXML, sXSLStr Dim sXMLStr If (Not IsArray(m_aSQlData)) Then m_nErrCode = m_nErrCode_NotArray Exit Sub End If ON ERROR RESUME NEXT Set m_oXSLDOM = Server.CreateObject("Microsoft.XMLDOM") Set m_oXMLDOM = Server.CreateObject("Microsoft.XMLDOM") If Err.Number <>0 Then m_nErrCode = m_nErrCode_XMLDOM Exit Sub End If sXSLStr = GetXSL() m_oXMLDOM.async = false m_oXSLDOM.async = false m_oXSLDOM.loadxml(sXSLStr) sDataXML = "<?xml version='1.0' encoding='" & m_sEncoding & "'?>" sDataXML = sDataXML & "<DataBase>" nMaxI = Ubound(m_aSQlData, 1) For nI=0 To nMaxI sTableName = m_aSQlData(nI, 0) If (Len(sTableName) > 0) Then sSQL = m_aSQlData(nI, 1) sXMLStr = GetDataXML(sTableName, sSQL, p_oDbConn) IF (m_nErrCode > m_nErrCode_NotErr) Then Exit Sub End IF sDataXML = sDataXML & sXMLStr End If Next sDataXML = sDataXML & "</DataBase>" IF (m_bIsOutput) Then Call ResponseXML(sDataXML) End IF IF (m_bIsSave) Then Call SaveDataXML(sDataXML) End IF End Sub '***************************************************** ' 函数: GetRndFileName() ' 描述: 获得随机名称,由当前时间和7位随机数字构成 '***************************************************** Private Function GetRndFileName() Dim nMax, nMin Dim sRnd, sDate
Randomize nMin = 1000000 nMax = 9999999 sRnd = Int( ( (nMax - nMin + 1) * Rnd ) + nMin) sDate = Replace( Replace( Replace( now(), "-", "") , ":", ""), " ", "") GetRndFileName = "_" & sDate & sRnd & ".xml" End Function '***************************************************** ' 函数: GetXSL() ' 描述: 获得XSL文件字符串 '***************************************************** Private Function GetXSL() Dim sXSLStr
sXSLStr = "" sXSLStr = sXSLStr & "<?xml version='1.0' encoding='" & m_sEncoding & "'?>" sXSLStr = sXSLStr & "<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform' xmlns:s='uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882' xmlns:dt='uuid:C2F41010-65B3-11d1-A29F-00AA00C14882' xmlns:rs='urn:schemas-microsoft-com:rowset' xmlns:z='#RowsetSchema'>" sXSLStr = sXSLStr & "<xsl:output omit-xml-declaration='yes'/>" sXSLStr = sXSLStr & "<xsl:template match='/'>" sXSLStr = sXSLStr & "<xsl:for-each select='/xml/rs:data/z:row'>" sXSLStr = sXSLStr & "<xsl:element name='Row'>" sXSLStr = sXSLStr & "<xsl:for-each select='@*'>" sXSLStr = sXSLStr & "<xsl:attribute name='{name()}'>" sXSLStr = sXSLStr & "<xsl:value-of select='.'/>" sXSLStr = sXSLStr & "</xsl:attribute>" sXSLStr = sXSLStr & "</xsl:for-each>" sXSLStr = sXSLStr & "</xsl:element>" sXSLStr = sXSLStr & "</xsl:for-each>" sXSLStr = sXSLStr & "</xsl:template>" sXSLStr = sXSLStr & "</xsl:stylesheet>" GetXSL = sXSLStr End Function '***************************************************** ' 函数: GetDataXML(ByRef p_sTableName, ByRef p_sSQL, ByRef p_oDbConn) ' 描述: 执行单条SQL,获得数据转换后的XML ' 参数: ' 1.p_sTableName : 表的名称 ' 2.p_sSQL : 读取数据的SQl语句 ' 3.p_oDbConn : 数据库连接对象 ' '***************************************************** Private Function GetDataXML(ByRef p_sTableName, ByRef p_sSQL, ByRef p_oDbConn) Dim oRecordset Dim sXMLStr, sCleanXML Dim nEnsData
ON ERROR RESUME NEXT nEnsData = 0 Set oRecordset = p_oDbConn.Execute(p_sSQL) If Err.Number <>0 Then m_nErrCode = m_nErrCode_ReadData Exit Function End If IF (Not oRecordset.eof) Then nEnsData = 1 End IF IF (nEnsData = 1) Then oRecordset.save m_oXMLDOM, 1 oRecordset.close Set oRecordset = Nothing sCleanXML = m_oXMLDOM.transformNode(m_oXSLDOM) sXMLStr = "<" & p_sTableName & ">" sXMLStr = sXMLStr & sCleanXML sXMLStr = sXMLStr & "</" & p_sTableName & ">" Else sXMLStr = "<" & p_sTableName & "/>" End IF GetDataXML = sXMLStr
End Function '***************************************************** ' 过程: SaveDataXML(ByRef p_sXMLStr) ' 描述: 保存XML格式的字符串到文件 ' 参数: ' p_sXMLStr : XML格式的字符串 '***************************************************** Private Sub SaveDataXML(ByRef p_sXMLStr) Dim sFileInfo
If (Len(m_sSaveFileName) = 0) Then m_sSaveFileName = GetRndFileName() End If If (Len(m_sSaveFilePath) = 0) Then sFileInfo = m_sSaveFileName Else IF (Right(m_sSaveFilePath,1) = "/")Then sFileInfo = m_sSaveFilePath & m_sSaveFileName Else sFileInfo = m_sSaveFilePath & "/" & m_sSaveFileName End IF End If m_oXMLDOM.loadxml(p_sXMLStr) ON ERROR RESUME NEXT m_oXMLDOM.save ( Server.MapPath(sFileInfo) ) If Err.Number <>0 Then m_nErrCode = m_nErrCode_Save Exit Sub End If End Sub '***************************************************** ' 过程: ResponseXML(ByRef p_sXMLStr) ' 描述: 输出XML格式的字符串到浏览器 ' 参数: ' p_sXMLStr : XML格式的字符串 '***************************************************** Private Sub ResponseXML(ByRef p_sXMLStr) Response.CharSet = m_sEncoding Response.ContentType = "text/xml" Response.write p_sXMLStr End Sub '============================= 数据导出 End =============================
'============================= 数据导入 Begin ============================= '***************************************************** ' 过程: Import(ByRef p_oDbConn) ' 描述: 导入数据 ' 参数: ' p_oDbConn: 数据库连接对象 ' '***************************************************** Public Sub Import(ByRef p_oDbConn) Dim oRootNode If (Len(m_sXMLFile) < 1) Then m_nErrCode = m_nErrCode_EnsFile Exit Sub End If ON ERROR RESUME NEXT Set m_oXMLDOM = Server.CreateObject("Microsoft.XMLDOM") If Err.Number <>0 Then m_nErrCode = m_nErrCode_XMLDOM Exit Sub End If m_oXMLDOM.async = false m_oXMLDOM.load( Server.MapPath(m_sXMLFile) ) If Err.Number <>0 Then m_nErrCode = m_nErrCode_EnsFile Exit Sub End If If (Len(m_oXMLDOM.xml) < 1) Then m_nErrCode = m_nErrCode_ErrFile Exit Sub End If Set oRootNode = m_oXMLDOM.documentElement Set m_oXMLDOM = Nothing m_sImportSQL = GetImportSQL(oRootNode) Set oRootNode = Nothing Call p_oDbConn.Execute(m_sImportSQL) If Err.Number <>0 Then m_nErrCode = m_nErrCode_WriteData Exit Sub End If End Sub '***************************************************** ' 函数: GetImportSQL(ByRef p_oDataBase) ' 描述: 获得将XML数据转换为SQL后的字符串 ' 参数: ' p_oDataBase : XML文件的根节点 ' '***************************************************** Private Function GetImportSQL(ByRef p_oDataBase) Dim oTable, oRow, oDatas, oData Dim sColNames, sColValues Dim sColName Dim sSQL
sSQL = ""
For Each oTable In p_oDataBase.childNodes For Each oRow In oTable.childNodes Set oDatas = oRow.selectNodes("@*") sColNames = "" sColValues = "" For Each oData In oDatas sColName = oData.nodeName If ( Instr( Lcase(Cstr(m_sVacancyCols)), Lcase(Cstr("," & sColName & ",")) ) < 1) Then sColNames = sColNames & sColName & ", " sColValues = sColValues & "'" & oData.nodeValue & "', " End If Next sColNames = "(" & Left(sColNames,Len(sColNames)-2) & ") " sColValues = "(" & Left(sColValues,Len(sColValues)-2) & ") " sSQL = sSQL & " Insert Into " & oTable.nodeName sSQL = sSQL & " " & sColNames & " Values " & sColValues & " ; " Next Next Set oData = Nothing Set oDatas = Nothing Set oRow = Nothing Set oTable = Nothing GetImportSQL = sSQL End Function '============================= 数据导入 End ============================= '***************************************************** ' 函数: GetErrExegesis(ByRef p_nErrCode) ' 描述: 获得错误代码的注释 ' 参数: ' p_oDataBase : XML文件的根节点 ' '***************************************************** Public Function GetErrExegesis(ByRef p_nErrCode) Dim sExegesis Dim nErrCode
nErrCode = Cint(p_nErrCode) Select Case (nErrCode) Case m_nErrCode_NotErr sXSLStr = "运行成功!" Case m_nErrCode_NotArray sXSLStr = "属性: SQL语句数组 不正确!" Case m_nErrCode_XMLDOM sXSLStr = "不能创建XML文档,服务器必须支持MSXML!" Case m_nErrCode_ReadData sXSLStr = "读取数据库数据发生错误! " & "<BR>" sXSLStr = sXSLStr & " 请检查 " & " " sXSLStr = sXSLStr & "1.数据库是否已连接 " & " " sXSLStr = sXSLStr & "2.语句是否正确 " Case m_nErrCode_WriteData sXSLStr = "写入数据库数据发生错误! " & "<BR>" sXSLStr = sXSLStr & " 请检查 " & " " sXSLStr = sXSLStr & "1.数据库是否已连接 " & " " sXSLStr = sXSLStr & "2.SQL语句是否正确 " & "<BR>" sXSLStr = sXSLStr & "SQL语句 " & "<BR><BR>" sXSLStr = sXSLStr & "" & m_sImportSQL Case m_nErrCode_Save sXSLStr = "不能保存XML文档,请检查是否对该目录或文件有' 写入权限 ' !" Case m_nErrCode_EnsFile sXSLStr = "不能读取XM数据,XML文件不存在 ' !" sXSLStr = sXSLStr & "文件:" & m_sXMLFile Case m_nErrCode_ErrFile sXSLStr = "不能读取XM数据,XML文件格式错误 ' !" sXSLStr = sXSLStr & "文件:" & m_sXMLFile Case Else sXSLStr = "未知错误 !" End Select GetErrExegesis = "<BR>" & sXSLStr & "<BR>" End Function End Class %>
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