response.setContentType()对应文件类型

271788203

image/bmp--BMP
image/gif--GIF
image/jpeg--JPEG
image/tiff--TIFF
image/x-dcx--DCX
image/x-pcx--PCX
text/html--HTML
text/plain--TXT
text/xml--XML
application/afp--AFP
application/pdf--PDF
application/rtf--RTF
application/msword--MSWORD
application/vnd.ms-excel--MSEXCEL
application/vnd.ms-powerpoint--MSPOWERPOINT
application/wordperfect5.1--WORDPERFECT
application/vnd.lotus-wordpro--WORDPRO
application/vnd.visio--VISIO
application/vnd.framemaker--FRAMEMAKER
application/vnd.lotus-1-2-3--LOTUS123