response.setContentType("application/octet-stream");

Question

 HttpServletResponse response;
    response.setContentType("application/octet-stream");
参数（application/octet-stream） 是嘛意思？

Answer 1

按照内容类型排列的 Mime 类型列表类型/子类型 扩展名 
application/envoy evy 
application/fractals fif 
application/futuresplash spl 
application/hta hta 
application/internet-property-stream acx 
application/mac-binhex40 hqx 
application/msword doc 
application/msword dot 
application/octet-stream * 
application/octet-stream bin 
application/octet-stream class 
application/octet-stream dms 
application/octet-stream exe 
application/octet-stream lha 
application/octet-stream lzh 
application/oda oda 
application/olescript axs 
application/pdf pdf 
application/pics-rules prf 
application/pkcs10 p10 
application/pkix-crl crl 
application/postscript ai 
application/postscript eps 
application/postscript ps 
application/rtf rtf 
application/set-payment-initiation setpay 
application/set-registration-initiation setreg 
application/vnd.ms-excel xla 
application/vnd.ms-excel xlc 
application/vnd.ms-excel xlm 
application/vnd.ms-excel xls 
application/vnd.ms-excel xlt 
application/vnd.ms-excel xlw 
application/vnd.ms-outlook msg 
application/vnd.ms-pkicertstore sst 
application/vnd.ms-pkiseccat cat 
application/vnd.ms-pkistl stl 
application/vnd.ms-powerpoint pot 
application/vnd.ms-powerpoint pps 
application/vnd.ms-powerpoint ppt 
application/vnd.ms-project mpp 
application/vnd.ms-works wcm 
application/vnd.ms-works wdb 
application/vnd.ms-works wks 
application/vnd.ms-works wps 
application/winhlp hlp 
application/x-bcpio bcpio 
application/x-cdf cdf 
application/x-compress z 
application/x-compressed tgz 
application/x-cpio cpio 
application/x-csh csh 
application/x-director dcr 
application/x-director dir 
application/x-director dxr 
application/x-dvi dvi 
application/x-gtar gtar 
application/x-gzip gz 
application/x-hdf hdf 
application/x-internet-signup ins 
application/x-internet-signup isp 
application/x-iphone iii 
application/x-javascript js 
application/x-latex latex 
application/x-msaccess mdb 
application/x-mscardfile crd 
application/x-msclip clp 
application/x-msdownload dll 
application/x-msmediaview m13 
application/x-msmediaview m14 
application/x-msmediaview mvb 
application/x-msmetafile wmf 
application/x-msmoney mny 
application/x-mspublisher pub 
application/x-msschedule scd 
application/x-msterminal trm 
application/x-mswrite wri 
application/x-netcdf cdf 
application/x-netcdf nc 
application/x-perfmon pma 
application/x-perfmon pmc 
application/x-perfmon pml 
application/x-perfmon pmr 
application/x-perfmon pmw 
application/x-pkcs12 p12 
application/x-pkcs12 pfx 
application/x-pkcs7-certificates p7b 
application/x-pkcs7-certificates spc 
application/x-pkcs7-certreqresp p7r 
application/x-pkcs7-mime p7c 
application/x-pkcs7-mime p7m 
application/x-pkcs7-signature p7s 
application/x-sh sh 
application/x-shar shar 
application/x-shockwave-flash swf 
application/x-stuffit sit 
application/x-sv4cpio sv4cpio 
application/x-sv4crc sv4crc 
application/x-tar tar 
application/x-tcl tcl 
application/x-tex tex 
application/x-texinfo texi 
application/x-texinfo texinfo 
application/x-troff roff 
application/x-troff t 
application/x-troff tr 
application/x-troff-man man 
application/x-troff-me me 
application/x-troff-ms ms 
application/x-ustar ustar 
application/x-wais-source src 
application/x-x509-ca-cert cer 
application/x-x509-ca-cert crt 
application/x-x509-ca-cert der 
application/ynd.ms-pkipko pko 
application/zip zip 
audio/basic au 
audio/basic snd 
audio/mid mid 
audio/mid rmi 
audio/mpeg mp3 
audio/x-aiff aif 
audio/x-aiff aifc 
audio/x-aiff aiff 
audio/x-mpegurl m3u 
audio/x-pn-realaudio ra 
audio/x-pn-realaudio ram 
audio/x-wav wav 
image/bmp bmp 
image/cis-cod cod 
image/gif gif 
image/ief ief 
image/jpeg jpe 
image/jpeg jpeg 
image/jpeg jpg 
image/pipeg jfif 
image/svg+xml svg 
image/tiff tif 
image/tiff tiff 
image/x-cmu-raster ras 
image/x-cmx cmx 
image/x-icon ico 
image/x-portable-anymap pnm 
image/x-portable-bitmap pbm 
image/x-portable-graymap pgm 
image/x-portable-pixmap ppm 
image/x-rgb rgb 
image/x-xbitmap xbm 
image/x-xpixmap xpm 
image/x-xwindowdump xwd 
message/rfc822 mht 
message/rfc822 mhtml 
message/rfc822 nws 
text/css css 
text/h323 323 
text/html htm 
text/html html 
text/html stm 
text/iuls uls 
text/plain bas 
text/plain c 
text/plain h 
text/plain txt 
text/richtext rtx 
text/scriptlet sct 
text/tab-separated-values tsv 
text/webviewhtml htt 
text/x-component htc 
text/x-setext etx 
text/x-vcard vcf 
video/mpeg mp2 
video/mpeg mpa 
video/mpeg mpe 
video/mpeg mpeg 
video/mpeg mpg 
video/mpeg mpv2 
video/quicktime mov 
video/quicktime qt 
video/x-la-asf lsf 
video/x-la-asf lsx 
video/x-ms-asf asf 
video/x-ms-asf asr 
video/x-ms-asf asx 
video/x-msvideo avi 
video/x-sgi-movie movie 
x-world/x-vrml flr 
x-world/x-vrml vrml 
x-world/x-vrml wrl 
x-world/x-vrml wrz 
x-world/x-vrml xaf 
x-world/x-vrml xof