response.setContentType() ;
• = application/octet-stream
 .001 = application/x-001
 .301 = application/x-301
 .323 = text/h323
 .906 = application/x-906
 .907 = drawing/907
 .a11 = application/x-a11
 .acp = audio/x-mei-aac
 .ai = application/postscript
 .aif = audio/aiff
 .aifc = audio/aiff
 .aiff = audio/aiff
 .anv = application/x-anv
 .asa = text/asa
 .asf = video/x-ms-asf
 .asp = text/asp
 .asx = video/x-ms-asf
 .au = audio/basic
 .avi = video/avi
 .awf = application/vnd.adobe.workflow
 .biz = text/xml
 .bmp = application/x-bmp
 .bot = application/x-bot
 .c4t = application/x-c4t
 .c90 = application/x-c90
 .cal = application/x-cals
 .cat = application/vnd.ms-pki.seccat
 .cdf = application/x-netcdf
 .cdr = application/x-cdr
 .cel = application/x-cel
 .cer = application/x-x509-ca-cert
 .cg4 = application/x-g4
 .cgm = application/x-cgm
 .cit = application/x-cit
 .class = java/*
 .cml = text/xml :客户端浏览器按XML格式进行解析文档
 .cmp = application/x-cmp
 .cmx = application/x-cmx
 .cot = application/x-cot
 .crl = application/pkix-crl
 .crt = application/x-x509-ca-cert
 .csi = application/x-csi
 .css = text/css :客户端浏览器按CSS格式进行解析文档
 .cut = application/x-cut
 .dbf = application/x-dbf
 .dbm = application/x-dbm
 .dbx = application/x-dbx
 .dcd = text/xml :客户端浏览器按XML格式进行解析文档
 .dcx = application/x-dcx
 .der = application/x-x509-ca-cert
 .dgn = application/x-dgn
 .dib = application/x-dib
 .dll = application/x-msdownload
 .doc = application/msword
 .dot = application/msword
 .drw = application/x-drw
 .dtd = text/xml :客户端浏览器按XML格式进行解析文档
 .dwf = Model/vnd.dwf
 .dwf = application/x-dwf
 .dwg = application/x-dwg
 .dxb = application/x-dxb
 .dxf = application/x-dxf
 .edn = application/vnd.adobe.edn
 .emf = application/x-emf
 .eml = message/rfc822
 .ent = text/xml :客户端浏览器按XML格式进行解析文档
 .epi = application/x-epi
 .eps = application/x-ps
 .eps = application/postscript
 .etd = application/x-ebx
 .exe = application/x-msdownload
 .fax = image/fax
 .fdf = application/vnd.fdf
 .fif = application/fractals
 .fo = text/xml :客户端浏览器按XML格式进行解析文档
 .frm = application/x-frm
 .g4 = application/x-g4
 .gbr = application/x-gbr
 .gcd = application/x-gcd
 .gif = image/gif
 .gl2 = application/x-gl2
 .gp4 = application/x-gp4
 .hgl = application/x-hgl
 .hmr = application/x-hmr
 .hpg = application/x-hpgl
 .hpl = application/x-hpl
 .hqx = application/mac-binhex40
 .hrf = application/x-hrf
 .hta = application/hta
 .htc = text/x-component
 .htm = text/html :客户端浏览器按超文本格式进行解析文档
 .html = text/html :客户端浏览器按超文本格式进行解析文档
 .htt = text/webviewhtml
 .htx = text/html :客户端浏览器按超文本格式进行解析文档
 .icb = application/x-icb
 .ico = image/x-icon
 .ico = application/x-ico
 .iff = application/x-iff
 .ig4 = application/x-g4
 .igs = application/x-igs
 .iii = application/x-iphone
 .img = application/x-img
 .ins = application/x-internet-signup
 .isp = application/x-internet-signup
 .IVF = video/x-ivf
 .java = java/*
 .jfif = image/jpeg
 .jpe = image/jpeg
 .jpe = application/x-jpe
 .jpeg = image/jpeg
 .jpg = image/jpeg
 .jpg = application/x-jpg
 .js = application/x-javascript
 .jsp = text/html :客户端浏览器按超文本格式进行解析文档
 .la1 = audio/x-liquid-file
 .lar = application/x-laplayer-reg
 .latex = application/x-latex
 .lavs = audio/x-liquid-secure
 .lbm = application/x-lbm
 .lmsff = audio/x-la-lms
 .ls = application/x-javascript
 .ltr = application/x-ltr
 .m1v = video/x-mpeg
 .m2v = video/x-mpeg
 .m3u = audio/mpegurl
 .m4e = video/mpeg4
 .mac = application/x-mac
 .man = application/x-troff-man
 .math = text/xml
 .mdb = application/msaccess
 .mdb = application/x-mdb
 .mfp = application/x-shockwave-flash
 .mht = message/rfc822
 .mhtml = message/rfc822
 .mi = application/x-mi
 .mid = audio/mid
 .midi = audio/mid
 .mil = application/x-mil
 .mml = text/xml
 .mnd = audio/x-musicnet-download
 .mns = audio/x-musicnet-stream
 .mocha = application/x-javascript
 .movie = video/x-sgi-movie
 .mp1 = audio/mp1
 .mp2 = audio/mp2
 .mp2v = video/mpeg
 .mp3 = audio/mp3
 .mp4 = video/mpeg4
 .mpa = video/x-mpg
 .mpd = application/vnd.ms-project
 .mpe = video/x-mpeg
 .mpeg = video/mpg
 .mpg = video/mpg
 .mpga = audio/rn-mpeg
 .mpp = application/vnd.ms-project
 .mps = video/x-mpeg
 .mpt = application/vnd.ms-project
 .mpv = video/mpg
 .mpv2 = video/mpeg
 .mpw = application/vnd.ms-project
 .mpx = application/vnd.ms-project
 .mtx = text/xml
 .mxp = application/x-mmxp
 .net = image/pnetvue
 .nrf = application/x-nrf
 .nws = message/rfc822
 .odc = text/x-ms-odc
 .out = application/x-out
 .p10 = application/pkcs10
 .p12 = application/x-pkcs12
 .p7b = application/x-pkcs7-certificates
 .p7c = application/pkcs7-mime
 .p7m = application/pkcs7-mime
 .p7r = application/x-pkcs7-certreqresp
 .p7s = application/pkcs7-signature
 .pc5 = application/x-pc5
 .pci = application/x-pci
 .pcl = application/x-pcl
 .pcx = application/x-pcx
 .pdf = application/pdf :客户端浏览器按PDF格式进行解析文档
 .pdf = application/pdf
 .pdx = application/vnd.adobe.pdx
 .pfx = application/x-pkcs12
 .pgl = application/x-pgl
 .pic = application/x-pic
 .pko = application/vnd.ms-pki.pko
 .pl = application/x-perl
 .plg = text/html
 .pls = audio/scpls
 .plt = application/x-plt
 .png = image/png
 .png = application/x-png
 .pot = application/vnd.ms-powerpoint
 .ppa = application/vnd.ms-powerpoint
 .ppm = application/x-ppm
 .pps = application/vnd.ms-powerpoint
 .ppt = application/vnd.ms-powerpoint
 .ppt = application/x-ppt
 .pr = application/x-pr
 .prf = application/pics-rules
 .prn = application/x-prn
 .prt = application/x-prt
 .ps = application/x-ps
 .ps = application/postscript
 .ptn = application/x-ptn
 .pwz = application/vnd.ms-powerpoint
 .r3t = text/vnd.rn-realtext3d
 .ra = audio/vnd.rn-realaudio
 .ram = audio/x-pn-realaudio
 .ras = application/x-ras
 .rat = application/rat-file
 .rdf = text/xml
 .rec = application/vnd.rn-recording
 .red = application/x-red
 .rgb = application/x-rgb
 .rjs = application/vnd.rn-realsystem-rjs
 .rjt = application/vnd.rn-realsystem-rjt
 .rlc = application/x-rlc
 .rle = application/x-rle
 .rm = application/vnd.rn-realmedia
 .rmf = application/vnd.adobe.rmf
 .rmi = audio/mid
 .rmj = application/vnd.rn-realsystem-rmj
 .rmm = audio/x-pn-realaudio
 .rmp = application/vnd.rn-rn_music_package
 .rms = application/vnd.rn-realmedia-secure
 .rmvb = application/vnd.rn-realmedia-vbr
 .rmx = application/vnd.rn-realsystem-rmx
 .rnx = application/vnd.rn-realplayer
 .rp = image/vnd.rn-realpix
 .rpm = audio/x-pn-realaudio-plugin
 .rsml = application/vnd.rn-rsml
 .rt = text/vnd.rn-realtext
 .rtf = application/msword
 .rtf = application/x-rtf
 .rv = video/vnd.rn-realvideo
 .sam = application/x-sam
 .sat = application/x-sat
 .sdp = application/sdp
 .sdw = application/x-sdw
 .sit = application/x-stuffit
 .slb = application/x-slb
 .sld = application/x-sld
 .slk = drawing/x-slk
 .smi = application/smil
 .smil = application/smil
 .smk = application/x-smk
 .snd = audio/basic
 .sol = text/plain
 .sor = text/plain
 .spc = application/x-pkcs7-certificates
 .spl = application/futuresplash
 .spp = text/xml
 .ssm = application/streamingmedia
 .sst = application/vnd.ms-pki.certstore
 .stl = application/vnd.ms-pki.stl
 .stm = text/html
 .sty = application/x-sty
 .svg = text/xml
 .swf = application/x-shockwave-flash :客户端浏览器按 Flash 格式进行解析文档
 .tdf = application/x-tdf
 .tg4 = application/x-tg4
 .tga = application/x-tga
 .tif = image/tiff
 .tif = application/x-tif
 .tiff = image/tiff
 .tld = text/xml
 .top = drawing/x-top
 .torrent = application/x-bittorrent
 .tsd = text/xml
 .txt = text/plain :客户端浏览器按 纯文本 格式进行解析文档
 .uin = application/x-icq
 .uls = text/iuls
 .vcf = text/x-vcard
 .vda = application/x-vda
 .vdx = application/vnd.visio
 .vml = text/xml
 .vpg = application/x-vpeg005
 .vsd = application/vnd.visio
 .vsd = application/x-vsd
 .vss = application/vnd.visio
 .vst = application/vnd.visio
 .vst = application/x-vst
 .vsw = application/vnd.visio
 .vsx = application/vnd.visio
 .vtx = application/vnd.visio
 .vxml = text/xml
 .wav = audio/wav
 .wax = audio/x-ms-wax
 .wb1 = application/x-wb1
 .wb2 = application/x-wb2
 .wb3 = application/x-wb3
 .wbmp = image/vnd.wap.wbmp
 .wiz = application/msword
 .wk3 = application/x-wk3
 .wk4 = application/x-wk4
 .wkq = application/x-wkq
 .wks = application/x-wks
 .wm = video/x-ms-wm
 .wma = audio/x-ms-wma
 .wmd = application/x-ms-wmd
 .wmf = application/x-wmf
 .wml = text/vnd.wap.wml
 .wmv = video/x-ms-wmv
 .wmx = video/x-ms-wmx
 .wmz = application/x-ms-wmz
 .wp6 = application/x-wp6
 .wpd = application/x-wpd
 .wpg = application/x-wpg
 .wpl = application/vnd.ms-wpl
 .wq1 = application/x-wq1
 .wr1 = application/x-wr1
 .wri = application/x-wri
 .wrk = application/x-wrk
 .ws = application/x-ws
 .ws2 = application/x-ws
 .wsc = text/scriptlet
 .wsdl = text/xml
 .wvx = video/x-ms-wvx
 .xdp = application/vnd.adobe.xdp
 .xdr = text/xml
 .xfd = application/vnd.adobe.xfd
 .xfdf = application/vnd.adobe.xfdf
 .xhtml = text/html
 .xls = application/vnd.ms-excel
 .xls = application/x-xls
 .xlw = application/x-xlw
 .xml = text/xml
 .xpl = audio/scpls
 .xq = text/xml
 .xql = text/xml
 .xquery = text/xml
 .xsd = text/xml
 .xsl = text/xml
 .xslt = text/xml
 .xwd = application/x-xwd
 .x_b = application/x-x_b
 .x_t = application/x-x_t