转：?http://blog.minidx.com/2008/01/24/436
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导致原因：
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从IIS或者Tomcat之类的Web服务器通过二进制流下载文件时（比如通过设置Header为Content-disposition:inline），如果被下载的文件是Office2007的dotx,docx,pot等后缀的时候，下载对话框中的图标会变成ZIP的，相应的文件名也会成为zip为扩展后缀的文件。其实出现这样的情况，是由于IE中对下载文件类型的判断，假如找不到相应后缀的MIME的话，会自动根据数据流来判断文件的类型，而微软对Office2007的格式做了和以前完全不同的处理。
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以前的Office文档是100%的二进制格式。第三方的工具操作起来非常不方便，而 Office2007从整体上都是基于XML格式的，这里并不是说Office2007文档可以保存成XML格式。而是Office2007默认的文档格式就是XML的（Word的docx、Excel的xlsx等）。也许有人会感到奇怪，用文本编辑器打开docx后，显示的仍然是二进制格式，并不是什么 XML。其实docx并不是普通的XML格式，当然，也不只是一个XML文件，docx本质上是一个zip文件，里面有一系列的xml、目录和其他的文件。如果我们将docx改成zip。就可以用winzip等软件将其解开。
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解决方案：
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在Server端添加MIME映射就可以了。如Tomcat , 修改/%tomcat_home%/conf/web.xml
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<mime-mapping> <extension>docx</extension> <mime-type>application/vnd.openxmlformats-officedocument.wordprocessingml.document</mime-type></mime-mapping><mime-mapping> <extension>xlsx</extension> <mime-type>application/vnd.openxmlformats-officedocument.spreadsheetml.sheet</mime-type></mime-mapping><mime-mapping> <extension>pptx</extension> <mime-type>application/vnd.openxmlformats-officedocument.presentationml.presentation</mime-type></mime-mapping>
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附录：
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下面收集了大部分文件的扩展名和相应的MIME对应，有需要的可以在列表中找到并添加。
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.asx,video/x-ms-asf.xml,text/xml.tsv,text/tab-separated-values.ra,audio/x-pn-realaudio.sv4crc,application/x-sv4crc.spc,application/x-pkcs7-certificates.pmc,application/x-perfmon.lit,application/x-ms-reader.crd,application/x-mscardfile.isp,application/x-internet-signup.wmlsc,application/vnd.wap.wmlscriptc.vst,application/vnd.visio.xlam,application/vnd.ms-excel.addin.macroEnabled.12.ttf,application/octet-stream.pfm,application/octet-stream.csv,application/octet-stream.aaf,application/octet-stream.one,application/onenote.hta,application/hta.atom,application/atom+xml.323,text/h323.mhtml,message/rfc822.midi,audio/mid.p7r,application/x-pkcs7-certreqresp.mny,application/x-msmoney.clp,application/x-msclip.vsd,application/vnd.visio.lpk,application/octet-stream.bin,application/octet-stream.onetoc,application/onenote.x,application/directx.wvx,video/x-ms-wvx.vcf,text/x-vcard.htc,text/x-component.htt,text/webviewhtml.h,text/plain.mht,message/rfc822.mid,audio/mid.p7b,application/x-pkcs7-certificates.gz,application/x-gzip.dvi,application/x-dvi.cpio,application/x-cpio.vdx,application/vnd.ms-visio.viewer.sldm,application/vnd.ms-powerpoint.slide.macroEnabled.12.xlm,application/vnd.ms-excel.fdf,application/vnd.fdf.setreg,application/set-registration-initiation.eps,application/postscript.p7s,application/pkcs7-signature.toc,application/octet-stream.mdp,application/octet-stream.ics,application/octet-stream.chm,application/octet-stream.asi,application/octet-stream.afm,application/octet-stream.evy,application/envoy.wmp,video/x-ms-wmp.qt,video/quicktime.mpv2,video/mpeg.xslt,text/xml.etx,text/x-setext.cod,image/cis-cod.snd,audio/basic.au,audio/basic.man,application/x-troff-man.qtl,application/x-quicktimeplayer.pmw,application/x-perfmon.class,application/x-java-applet.iii,application/x-iphone.csh,application/x-csh.z,application/x-compress.vtx,application/vnd.visio.vsw,application/vnd.visio.wps,application/vnd.ms-works.potx,application/vnd.openxmlformats-officedocument.presentationml.template.ps,application/postscript.p7c,application/pkcs7-mime.thn,application/octet-stream.mso,application/octet-stream.dot,application/msword.doc,application/msword.sgml,text/sgml.nws,message/rfc822.pbm,image/x-portable-bitmap.ief,image/ief.wav,audio/wav.texi,application/x-texinfo.mvb,application/x-msmediaview.hdf,application/x-hdf.vsx,application/vnd.visio.dotm,application/vnd.ms-word.template.macroEnabled.12.docm,application/vnd.ms-word.document.macroEnabled.12.pptx,application/vnd.openxmlformats-officedocument.presentationml.presentation.psm,application/octet-stream.java,application/octet-stream.eot,application/octet-stream.jar,application/java-archive.mpeg,video/mpeg.xsf,text/xml.map,text/plain.uls,text/iuls.rf,image/vnd.rn-realflash.m3u,audio/x-mpegurl.wma,audio/x-ms-wma.aifc,audio/aiff.mdb,application/x-msaccess.mvc,application/x-miva-compiled.stl,application/vnd.ms-pki.stl.ppsx,application/vnd.openxmlformats-officedocument.presentationml.slideshow.xlsb,application/vnd.ms-excel.sheet.binary.macroEnabled.12.setpay,application/set-payment-initiation.prm,application/octet-stream.mix,application/octet-stream.lzh,application/octet-stream.hhk,application/octet-stream.onepkg,application/onenote.xaf,x-world/x-vrml.flr,x-world/x-vrml.IVF,video/x-ivf.cnf,text/plain.asm,text/plain.tiff,image/tiff.wax,audio/x-ms-wax.ms,application/x-troff-ms.tcl,application/x-tcl.shar,application/x-shar.sh,application/x-sh.nc,application/x-netcdf.hlp,application/winhlp.oda,application/oda.pfb,application/octet-stream.fla,application/octet-stream.wm,video/x-ms-wm.rgb,image/x-rgb.ppm,image/x-portable-pixmap.ram,audio/x-pn-realaudio.sit,application/x-stuffit.dir,application/x-director.mpp,application/vnd.ms-project.xla,application/vnd.ms-excel.ssm,application/streamingmedia.axs,application/olescript.ods,application/oleobject.psp,application/octet-stream.jpb,application/octet-stream.wrz,x-world/x-vrml.m1v,video/mpeg.mno,text/xml.cmx,image/x-cmx.jpeg,image/jpeg.dib,image/bmp.rmi,audio/mid.aiff,audio/aiff.wmd,application/x-ms-wmd.wri,application/x-mswrite.pub,application/x-mspublisher.ins,application/x-internet-signup.wks,application/vnd.ms-works.xls,application/vnd.ms-excel.ai,application/postscript.crl,application/pkix-crl.qxd,application/octet-stream.dwp,application/octet-stream.xof,x-world/x-vrml.wmv,video/x-ms-wmv.nsc,video/x-ms-asf.mpa,video/mpeg.pnm,image/x-portable-anymap.rpm,audio/x-pn-realaudio-plugin.aif,audio/x-aiff.me,application/x-troff-me.pml,application/x-perfmon.trm,application/x-msterminal.m13,application/x-msmediaview.js,application/x-javascript.dxr,application/x-director.potm,application/vnd.ms-powerpoint.template.macroEnabled.12.xltx,application/vnd.openxmlformats-officedocument.spreadsheetml.template.xlt,application/vnd.ms-excel.xlc,application/vnd.ms-excel.p10,application/pkcs10.smi,application/octet-stream.sea,application/octet-stream.hqx,application/mac-binhex40.spl,application/futuresplash.movie,video/x-sgi-movie.lsf,video/x-la-asf.txt,text/plain.jfif,image/pjpeg.jpe,image/jpeg.zip,application/x-zip-compressed.wmf,application/x-msmetafile.m14,application/x-msmediaview.latex,application/x-latex.wcm,application/vnd.ms-works.pptm,application/vnd.ms-powerpoint.presentation.macroEnabled.12.xlsx,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.hhp,application/octet-stream.aca,application/octet-stream.accdb,application/msaccess.jcz,application/liquidmotion.wrl,x-world/x-vrml.wmx,video/x-ms-wmx.asr,video/x-ms-asf.lsx,video/x-la-asf.xsl,text/xml,text/html.tif,image/tiff.der,application/x-x509-ca-cert.pfx,application/x-pkcs12.p12,application/x-pkcs12.ppsm,application/vnd.ms-powerpoint.slideshow.macroEnabled.12.cur,application/octet-stream.accdt,application/msaccess.hdml,text/x-hdml.htm,text/html.xbm,image/x-xbitmap.jpg,image/jpeg.texinfo,application/x-texinfo.ppam,application/vnd.ms-powerpoint.addin.macroEnabled.12.xlw,application/vnd.ms-excel.rm,application/vnd.rn-realmedia.pdf,application/pdf.rar,application/octet-stream.psd,application/octet-stream.inf,application/octet-stream.emz,application/octet-stream.dsp,application/octet-stream.onea,application/onenote.jck,application/liquidmotion.mpe,video/mpeg.mp2,video/mpeg.sct,text/scriptlet.ras,image/x-cmu-raster.swf,application/x-shockwave-flash.wmz,application/x-ms-wmz.gtar,application/x-gtar.dcr,application/x-director.sldx,application/vnd.openxmlformats-officedocument.presentationml.slide.pps,application/vnd.ms-pps.p7m,application/pkcs7-mime.xsn,application/octet-stream.ocx,application/octet-stream.accde,application/msaccess.mov,video/quicktime.wmls,text/vnd.wap.wmlscript.cpp,text/plain.c,text/plain.bas,text/plain.css,text/css.art,image/x-jg.mp3,audio/mpeg.t,application/x-troff.roff,application/x-troff.tar,application/x-tar.hhc,application/x-oleobject.scd,application/x-msschedule.pko,application/vnd.ms-pki.pko.sst,application/vnd.ms-pki.certstore.ppt,application/vnd.ms-powerpoint.xtp,application/octet-stream.u32,application/octet-stream.pcx,application/octet-stream.msi,application/octet-stream.exe,application/octet-stream.asd,application/octet-stream.onetoc2,application/onenote.fif,application/fractals.mpg,video/mpeg.vml,text/xml.xdr,text/plain.vcs,text/plain.hxt,text/html.eml,message/rfc822.xpm,image/x-xpixmap.ico,image/x-icon.gif,image/gif.dwf,drawing/x-dwf.src,application/x-wais-source.tr,application/x-troff.pmr,application/x-perfmon.pma,application/x-perfmon.dll,application/x-msdownload.bcpio,application/x-bcpio.wmlc,application/vnd.wap.wmlc.wdb,application/vnd.ms-works.dotx,application/vnd.openxmlformats-officedocument.wordprocessingml.template.docx,application/vnd.openxmlformats-officedocument.wordprocessingml.document.pot,application/vnd.ms-powerpoint.xltm,application/vnd.ms-excel.template.macroEnabled.12.rtf,application/rtf.prf,application/pics-rules.snp,application/octet-stream.cab,application/octet-stream.avi,video/x-msvideo.asf,video/x-ms-asf.dtd,text/xml.wml,text/vnd.wap.wml.vbs,text/vbscript.rtx,text/richtext.dlm,text/dlm.xwd,image/x-xwindowdump.pgm,image/x-portable-graymap.bmp,image/bmp.crt,application/x-x509-ca-cert.ustar,application/x-ustar.tex,application/x-tex.sv4cpio,application/x-sv4cpio.tgz,application/x-compressed.cdf,application/x-cdf.vss,application/vnd.visio.cat,application/vnd.ms-pki.seccat.thmx,application/vnd.ms-officetheme.xlsm,application/vnd.ms-excel.sheet.macroEnabled.12.prx,application/octet-stream.pcz,application/octet-stream.onetmp,application/onenote.acx,application/internet-property-stream.wsdl,text/xml.disco,text/xml.xsd,text/xml.wbmp,image/vnd.wap.wbmp.png,image/png.pnz,image/png.smd,audio/x-smd.smz,audio/x-smd.smx,audio/x-smd.mmf,application/x-smaf?
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