怎么把已知的数据保存成xml文件,现在已知的数据是
<?mso-application progid="Excel.Sheet"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
 xmlns:o="urn:schemas-microsoft-com:office:office"
 xmlns:x="urn:schemas-microsoft-com:office:excel"
 xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
 xmlns:html="http://www.w3.org/TR/REC-html40">
 <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
  <LastAuthor>Great Way man</LastAuthor>
  <Created>2010-02-23T08:47:00Z</Created>
  <LastSaved>2010-02-23T08:46:49Z</LastSaved>
  <Version>11.5606</Version>
 </DocumentProperties>
 <OfficeDocumentSettings xmlns="urn:schemas-microsoft-com:office:office">
  <Colors>
   <Color>
    <Index>36</Index>
    <RGB>#FFFFFF</RGB>
   </Color>
   <Color>
    <Index>38</Index>
    <RGB>#A7A6AA</RGB>
   </Color>.......