手写代码：
XML格式化使用msxml引擎，Delphi代码如下：
使用实例：
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unit uXMLFormat;interfaceuses SysUtils, ActiveX, msxml; function PrettyFormat(const AXML: String): String;implementationconst SMSDOMNotInstalled = 'Microsoft MSXML 4.0 or upper is not installed.'; // msxml parser 4.0 ProgID_FreeThreadedDOMDocument40 = 'Msxml2.FreeThreadedDOMDocument.4.0'; // msxml parser 6.0 ProgID_FreeThreadedDOMDocument60 = 'Msxml2.FreeThreadedDOMDocument.6.0';type EMSXMLDomException = class(Exception);function TryObjectCreateFromProgID(const ProgIDList: array of PWideChar): IUnknown; overload;var I: Integer; FClsID: TGUID; Status: HResult;begin for I := Low(ProgIDList) to High(ProgIDList) do if Succeeded(CLSIDFromProgID(ProgIDList[I], FClsID)) then begin Status := CoCreateInstance(FClsID, nil, CLSCTX_INPROC_SERVER or CLSCTX_LOCAL_SERVER, IUnknown, Result); if Status = S_OK then Exit; end;end;function CreateDOMDocument: IXMLDOMDocument;begin Result := TryObjectCreateFromProgID([ProgID_FreeThreadedDOMDocument60, ProgID_FreeThreadedDOMDocument40]) as IXMLDOMDocument; if not Assigned(Result) then raise EMSXMLDomException.Create(SMSDOMNotInstalled);end;function PrettyFormat(const AXML: String): String; var FXMLDoc: IXMLDOMDocument; procedure TraverseNode(Node: IXMLDOMNode; Indent: string); const IndentLevel = #9; var LineBreak: IXMLDOMNode; ChildNode, NextNode: IXMLDOMNode; AnyChildNode: Boolean; begin if Node = nil then Exit; AnyChildNode:= False; ChildNode:= Node.Get_firstChild; while ChildNode <> nil do begin NextNode:= ChildNode.nextSibling; if ChildNode.nodeType = NODE_ELEMENT then begin AnyChildNode:= True; // Insert LineBreak before each child Node LineBreak:= FXMLDoc.createTextNode(sLineBreak + Indent + IndentLevel); Node.insertBefore(LineBreak, ChildNode); TraverseNode(ChildNode, Indent + IndentLevel); end; ChildNode:= NextNode; end; if (Node.nodeType = NODE_ELEMENT) and AnyChildNode then begin // Add LineBreak after Node ChildNode:= NextNode; LineBreak:= FXMLDoc.createTextNode(sLineBreak + Indent); Node.appendChild(LineBreak); end; end;begin Result := AXML; FXMLDoc := CreateDOMDocument; if Assigned(FXMLDoc) and FXMLDoc.loadXML(AXML) then begin TraverseNode(FXMLDoc.documentElement, ''); Result := FXMLDoc.xml; end;end;end. |
使用实例：
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Memo2.Text := PrettyFormat('<root><budded/><who/></root>'); |
格式化后结果：
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<root> <budded/> <who/></root> |
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无需那么复杂，设置XMLDocument的Options属性就可以了，doNodeAutoIndent 才是关键的。举个例子：
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uses XMLIntf,XMLDoc;procedure TForm1.Button1Click(Sender: TObject);var xmlDoc: IXMLDocument; aNode: IXMLNode;begin xmlDoc := TXMLDocument.Create(nil); try // 加入版本信息 xmlDoc.Active := True; xmlDoc.Version := '1.0'; xmlDoc.Encoding :='GB2312'; xmlDoc.Options := xmlDoc.Options + [doNodeAutoIndent]; // 加入根结点 aNode := xmlDoc.AddChild('RootNode'); // 加入子结点 aNode := aNode.AddChild('ChildNode'); // 设置子结点属性 aNode.SetAttribute('Name', '名称'); aNode.SetAttribute('Len', '长度'); // 设置子结点内容 aNode.Text := '文本内容'; xmlDoc.SaveToFile('C:ccrun123.xml'); finally xmlDoc := nil ; end;end; |
参考：http://bbs.csdn.net/topics/310071629