image/bmp BMP
image/png PNG
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
application/octet-stream 信息流
常用Java中response.setContentType参数
原文：http://www.cnblogs.com/Jeremy2001/p/6323546.html