office所有字尾對應的content-type

字尾    MIME Type

.doc    application/msword

.dot    application/msword

.docx    application/vnd.openxmlformats-officedocument.wordprocessingml.document

.dotx    application/vnd.openxmlformats-officedocument.wordprocessingml.template

.docm    application/vnd.ms-word.document.macroEnabled.12

.dotm    application/vnd.ms-word.template.macroEnabled.12

.xls    application/vnd.ms-excel

.xlt    application/vnd.ms-excel

.xla    application/vnd.ms-excel

.xlsx    application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

.xltx    application/vnd.openxmlformats-officedocument.spreadsheetml.template

.xlsm    application/vnd.ms-excel.sheet.macroEnabled.12

.xltm    application/vnd.ms-excel.template.macroEnabled.12

.xlam    application/vnd.ms-excel.addin.macroEnabled.12

.xlsb    application/vnd.ms-excel.sheet.binary.macroEnabled.12

.ppt    application/vnd.ms-powerpoint

.pot    application/vnd.ms-powerpoint

.pps    application/vnd.ms-powerpoint

.ppa    application/vnd.ms-powerpoint

.pptx    application/vnd.openxmlformats-officedocument.presentationml.presentation

.potx    application/vnd.openxmlformats-officedocument.presentationml.template

.ppsx    application/vnd.openxmlformats-officedocument.presentationml.slideshow

.ppam    application/vnd.ms-powerpoint.addin.macroEnabled.12

.pptm    application/vnd.ms-powerpoint.presentation.macroEnabled.12

.potm    application/vnd.ms-powerpoint.presentation.macroEnabled.12

.ppsm    application/vnd.ms-powerpoint.slideshow.macroEnabled.12

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原文連結：https://blog.csdn.net/xiaoranzhizhu/article/details/70473734