关天response.setContentType()

response.setContentType()的作用是使客户端浏览器，区分不同种类的数据，并根据不同的MIME调用浏览器内不同的程序嵌入模块来处理相应的数据。例如web浏览器就是通过MIME类型来判断文件是GIF图片。通过MIME类型来处理json字符串。

常用文件扩展名对应的MIME格式

// 响应的是json数据里面包含了html标签   
response.setContentType("application/json;charset=UTF-8");类型/子类型扩展名application/envoyevyapplication/fractalsfifapplication/futuresplashsplapplication/htahtaapplication/internet-property-streamacxapplication/mac-binhex40hqxapplication/msworddocapplication/msworddotapplication/octet-stream*application/octet-streambinapplication/octet-streamclassapplication/octet-streamdmsapplication/octet-streamexeapplication/octet-streamlhaapplication/octet-streamlzhapplication/odaodaapplication/olescriptaxsapplication/pdfpdfapplication/pics-rulesprfapplication/pkcs10p10application/pkix-crlcrlapplication/postscriptaiapplication/postscriptepsapplication/postscriptpsapplication/rtfrtfapplication/set-payment-initiationsetpayapplication/set-registration-initiationsetregapplication/vnd.ms-excelxlaapplication/vnd.ms-excelxlcapplication/vnd.ms-excelxlmapplication/vnd.ms-excelxlsapplication/vnd.ms-excelxltapplication/vnd.ms-excelxlwapplication/vnd.ms-outlookmsgapplication/vnd.ms-pkicertstoresstapplication/vnd.ms-pkiseccatcatapplication/vnd.ms-pkistlstlapplication/vnd.ms-powerpointpotapplication/vnd.ms-powerpointppsapplication/vnd.ms-powerpointpptapplication/vnd.ms-projectmppapplication/vnd.ms-workswcmapplication/vnd.ms-workswdbapplication/vnd.ms-workswksapplication/vnd.ms-workswpsapplication/winhlphlpapplication/x-bcpiobcpioapplication/x-cdfcdfapplication/x-compresszapplication/x-compressedtgzapplication/x-cpiocpioapplication/x-cshcshapplication/x-directordcrapplication/x-directordirapplication/x-directordxrapplication/x-dvidviapplication/x-gtargtarapplication/x-gzipgzapplication/x-hdfhdfapplication/x-internet-signupinsapplication/x-internet-signupispapplication/x-iphoneiiiapplication/x-javascriptjsapplication/x-latexlatexapplication/x-msaccessmdbapplication/x-mscardfilecrdapplication/x-msclipclpapplication/x-msdownloaddllapplication/x-msmediaviewm13application/x-msmediaviewm14application/x-msmediaviewmvbapplication/x-msmetafilewmfapplication/x-msmoneymnyapplication/x-mspublisherpubapplication/x-msschedulescdapplication/x-msterminaltrmapplication/x-mswritewriapplication/x-netcdfcdfapplication/x-netcdfncapplication/x-perfmonpmaapplication/x-perfmonpmcapplication/x-perfmonpmlapplication/x-perfmonpmrapplication/x-perfmonpmwapplication/x-pkcs12p12application/x-pkcs12pfxapplication/x-pkcs7-certificatesp7bapplication/x-pkcs7-certificatesspcapplication/x-pkcs7-certreqrespp7rapplication/x-pkcs7-mimep7capplication/x-pkcs7-mimep7mapplication/x-pkcs7-signaturep7sapplication/x-shshapplication/x-sharsharapplication/x-shockwave-flashswfapplication/x-stuffitsitapplication/x-sv4cpiosv4cpioapplication/x-sv4crcsv4crcapplication/x-tartarapplication/x-tcltclapplication/x-textexapplication/x-texinfotexiapplication/x-texinfotexinfoapplication/x-troffroffapplication/x-trofftapplication/x-trofftrapplication/x-troff-manmanapplication/x-troff-memeapplication/x-troff-msmsapplication/x-ustarustarapplication/x-wais-sourcesrcapplication/x-x509-ca-certcerapplication/x-x509-ca-certcrtapplication/x-x509-ca-certderapplication/ynd.ms-pkipkopkoapplication/zipzipaudio/basicauaudio/basicsndaudio/midmidaudio/midrmiaudio/mpegmp3audio/x-aiffaifaudio/x-aiffaifcaudio/x-aiffaiffaudio/x-mpegurlm3uaudio/x-pn-realaudioraaudio/x-pn-realaudioramaudio/x-wavwavimage/bmpbmpimage/cis-codcodimage/gifgifimage/iefiefimage/jpegjpeimage/jpegjpegimage/jpegjpgimage/pipegjfifimage/svg+xmlsvgimage/tifftifimage/tifftiffimage/x-cmu-rasterrasimage/x-cmxcmximage/x-iconicoimage/x-portable-anymappnmimage/x-portable-bitmappbmimage/x-portable-graymappgmimage/x-portable-pixmapppmimage/x-rgbrgbimage/x-xbitmapxbmimage/x-xpixmapxpmimage/x-xwindowdumpxwdmessage/rfc822mhtmessage/rfc822mhtmlmessage/rfc822nwstext/csscsstext/h323323text/htmlhtmtext/htmlhtmltext/htmlstmtext/iulsulstext/plainbastext/plainctext/plainhtext/plaintxttext/richtextrtxtext/scriptletscttext/tab-separated-valuestsvtext/webviewhtmlhtttext/x-componenthtctext/x-setextetxtext/x-vcardvcfvideo/mpegmp2video/mpegmpavideo/mpegmpevideo/mpegmpegvideo/mpegmpgvideo/mpegmpv2video/quicktimemovvideo/quicktimeqtvideo/x-la-asflsfvideo/x-la-asflsxvideo/x-ms-asfasfvideo/x-ms-asfasrvideo/x-ms-asfasxvideo/x-msvideoavivideo/x-sgi-moviemoviex-world/x-vrmlflrx-world/x-vrmlvrmlx-world/x-vrmlwrlx-world/x-vrmlwrzx-world/x-vrmlxafx-world/x-vrmlxof

按照字母顺序排列的MIME_type扩展名

扩展名类型/子类型*application/octet-stream323text/h323acxapplication/internet-property-streamaiapplication/postscriptaifaudio/x-aiffaifcaudio/x-aiffaiffaudio/x-aiffasfvideo/x-ms-asfasrvideo/x-ms-asfasxvideo/x-ms-asfauaudio/basicavivideo/x-msvideoaxsapplication/olescriptbastext/plainbcpioapplication/x-bcpiobinapplication/octet-streambmpimage/bmpctext/plaincatapplication/vnd.ms-pkiseccatcdfapplication/x-cdfcerapplication/x-x509-ca-certclassapplication/octet-streamclpapplication/x-msclipcmximage/x-cmxcodimage/cis-codcpioapplication/x-cpiocrdapplication/x-mscardfilecrlapplication/pkix-crlcrtapplication/x-x509-ca-certcshapplication/x-cshcsstext/cssdcrapplication/x-directorderapplication/x-x509-ca-certdirapplication/x-directordllapplication/x-msdownloaddmsapplication/octet-streamdocapplication/msworddotapplication/msworddviapplication/x-dvidxrapplication/x-directorepsapplication/postscriptetxtext/x-setextevyapplication/envoyexeapplication/octet-streamfifapplication/fractalsflrx-world/x-vrmlgifimage/gifgtarapplication/x-gtargzapplication/x-gziphtext/plainhdfapplication/x-hdfhlpapplication/winhlphqxapplication/mac-binhex40htaapplication/htahtctext/x-componenthtmtext/htmlhtmltext/htmlhtttext/webviewhtmlicoimage/x-iconiefimage/iefiiiapplication/x-iphoneinsapplication/x-internet-signupispapplication/x-internet-signupjfifimage/pipegjpeimage/jpegjpegimage/jpegjpgimage/jpegjsapplication/x-javascriptlatexapplication/x-latexlhaapplication/octet-streamlsfvideo/x-la-asflsxvideo/x-la-asflzhapplication/octet-streamm13application/x-msmediaviewm14application/x-msmediaviewm3uaudio/x-mpegurlmanapplication/x-troff-manmdbapplication/x-msaccessmeapplication/x-troff-memhtmessage/rfc822mhtmlmessage/rfc822midaudio/midmnyapplication/x-msmoneymovvideo/quicktimemovievideo/x-sgi-moviemp2video/mpegmp3audio/mpegmpavideo/mpegmpevideo/mpegmpegvideo/mpegmpgvideo/mpegmppapplication/vnd.ms-projectmpv2video/mpegmsapplication/x-troff-msmvbapplication/x-msmediaviewnwsmessage/rfc822odaapplication/odap10application/pkcs10p12application/x-pkcs12p7bapplication/x-pkcs7-certificatesp7capplication/x-pkcs7-mimep7mapplication/x-pkcs7-mimep7rapplication/x-pkcs7-certreqrespp7sapplication/x-pkcs7-signaturepbmimage/x-portable-bitmappdfapplication/pdfpfxapplication/x-pkcs12pgmimage/x-portable-graymappkoapplication/ynd.ms-pkipkopmaapplication/x-perfmonpmcapplication/x-perfmonpmlapplication/x-perfmonpmrapplication/x-perfmonpmwapplication/x-perfmonpnmimage/x-portable-anymappot,application/vnd.ms-powerpointppmimage/x-portable-pixmapppsapplication/vnd.ms-powerpointpptapplication/vnd.ms-powerpointprfapplication/pics-rulespsapplication/postscriptpubapplication/x-mspublisherqtvideo/quicktimeraaudio/x-pn-realaudioramaudio/x-pn-realaudiorasimage/x-cmu-rasterrgbimage/x-rgbrmiaudio/mid http://www.dreamdu.comroffapplication/x-troffrtfapplication/rtfrtxtext/richtextscdapplication/x-msschedulescttext/scriptletsetpayapplication/set-payment-initiationsetregapplication/set-registration-initiationshapplication/x-shsharapplication/x-sharsitapplication/x-stuffitsndaudio/basicspcapplication/x-pkcs7-certificatessplapplication/futuresplashsrcapplication/x-wais-sourcesstapplication/vnd.ms-pkicertstorestlapplication/vnd.ms-pkistlstmtext/htmlsvgimage/svg+xmlsv4cpioapplication/x-sv4cpiosv4crcapplication/x-sv4crcswfapplication/x-shockwave-flashtapplication/x-trofftarapplication/x-tartclapplication/x-tcltexapplication/x-textexiapplication/x-texinfotexinfoapplication/x-texinfotgzapplication/x-compressedtifimage/tifftiffimage/tifftrapplication/x-trofftrmapplication/x-msterminaltsvtext/tab-separated-valuestxttext/plainulstext/iulsustarapplication/x-ustarvcftext/x-vcardvrmlx-world/x-vrmlwavaudio/x-wavwcmapplication/vnd.ms-workswdbapplication/vnd.ms-workswksapplication/vnd.ms-workswmfapplication/x-msmetafilewpsapplication/vnd.ms-workswriapplication/x-mswritewrlx-world/x-vrmlwrzx-world/x-vrmlxafx-world/x-vrmlxbmimage/x-xbitmapxlaapplication/vnd.ms-excelxlcapplication/vnd.ms-excelxlmapplication/vnd.ms-excelxlsapplication/vnd.ms-excelxltapplication/vnd.ms-excelxlwapplication/vnd.ms-excelxofx-world/x-vrmlxpmimage/x-xpixmapxwdimage/x-xwindowdumpzapplication/x-compresszipapplication/zip文件扩展名Content-Type(Mime-Type)文件扩展名Content-Type(Mime-Type).*（ 二进制流，不知道下载文件类型）application/octet-stream.tifimage/tiff.001application/x-001.301application/x-301.323text/h323.906application/x-906.907drawing/907.a11application/x-a11.acpaudio/x-mei-aac.aiapplication/postscript.aifaudio/aiff.aifcaudio/aiff.aiffaudio/aiff.anvapplication/x-anv.asatext/asa.asfvideo/x-ms-asf.asptext/asp.asxvideo/x-ms-asf.auaudio/basic.avivideo/avi.awfapplication/vnd.adobe.workflow.biztext/xml.bmpapplication/x-bmp.botapplication/x-bot.c4tapplication/x-c4t.c90application/x-c90.calapplication/x-cals.catapplication/vnd.ms-pki.seccat.cdfapplication/x-netcdf.cdrapplication/x-cdr.celapplication/x-cel.cerapplication/x-x509-ca-cert.cg4application/x-g4.cgmapplication/x-cgm.citapplication/x-cit.classjava/*.cmltext/xml.cmpapplication/x-cmp.cmxapplication/x-cmx.cotapplication/x-cot.crlapplication/pkix-crl.crtapplication/x-x509-ca-cert.csiapplication/x-csi.csstext/css.cutapplication/x-cut.dbfapplication/x-dbf.dbmapplication/x-dbm.dbxapplication/x-dbx.dcdtext/xml.dcxapplication/x-dcx.derapplication/x-x509-ca-cert.dgnapplication/x-dgn.dibapplication/x-dib.dllapplication/x-msdownload.docapplication/msword.dotapplication/msword.drwapplication/x-drw.dtdtext/xml.dwfModel/vnd.dwf.dwfapplication/x-dwf.dwgapplication/x-dwg.dxbapplication/x-dxb.dxfapplication/x-dxf.ednapplication/vnd.adobe.edn.emfapplication/x-emf.emlmessage/rfc822.enttext/xml.epiapplication/x-epi.epsapplication/x-ps.epsapplication/postscript.etdapplication/x-ebx.exeapplication/x-msdownload.faximage/fax.fdfapplication/vnd.fdf.fifapplication/fractals.fotext/xml.frmapplication/x-frm.g4application/x-g4.gbrapplication/x-gbr.application/x-.gifimage/gif.gl2application/x-gl2.gp4application/x-gp4.hglapplication/x-hgl.hmrapplication/x-hmr.hpgapplication/x-hpgl.hplapplication/x-hpl.hqxapplication/mac-binhex40.hrfapplication/x-hrf.htaapplication/hta.htctext/x-component.htmtext/html.htmltext/html.htttext/webviewhtml.htxtext/html.icbapplication/x-icb.icoimage/x-icon.icoapplication/x-ico.iffapplication/x-iff.ig4application/x-g4.igsapplication/x-igs.iiiapplication/x-iphone.imgapplication/x-img.insapplication/x-internet-signup.ispapplication/x-internet-signup.IVFvideo/x-ivf.javajava/*.jfifimage/jpeg.jpeimage/jpeg.jpeapplication/x-jpe.jpegimage/jpeg.jpgimage/jpeg.jpgapplication/x-jpg.jsapplication/x-javascript.jsptext/html.la1audio/x-liquid-file.larapplication/x-laplayer-reg.latexapplication/x-latex.lavsaudio/x-liquid-secure.lbmapplication/x-lbm.lmsffaudio/x-la-lms.lsapplication/x-javascript.ltrapplication/x-ltr.m1vvideo/x-mpeg.m2vvideo/x-mpeg.m3uaudio/mpegurl.m4evideo/mpeg4.macapplication/x-mac.manapplication/x-troff-man.mathtext/xml.mdbapplication/msaccess.mdbapplication/x-mdb.mfpapplication/x-shockwave-flash.mhtmessage/rfc822.mhtmlmessage/rfc822.miapplication/x-mi.midaudio/mid.midiaudio/mid.milapplication/x-mil.mmltext/xml.mndaudio/x-musicnet-download.mnsaudio/x-musicnet-stream.mochaapplication/x-javascript.movievideo/x-sgi-movie.mp1audio/mp1.mp2audio/mp2.mp2vvideo/mpeg.mp3audio/mp3.mp4video/mpeg4.mpavideo/x-mpg.mpdapplication/vnd.ms-project.mpevideo/x-mpeg.mpegvideo/mpg.mpgvideo/mpg.mpgaaudio/rn-mpeg.mppapplication/vnd.ms-project.mpsvideo/x-mpeg.mptapplication/vnd.ms-project.mpvvideo/mpg.mpv2video/mpeg.mpwapplication/vnd.ms-project.mpxapplication/vnd.ms-project.mtxtext/xml.mxpapplication/x-mmxp.netimage/pnetvue.nrfapplication/x-nrf.nwsmessage/rfc822.odctext/x-ms-odc.outapplication/x-out.p10application/pkcs10.p12application/x-pkcs12.p7bapplication/x-pkcs7-certificates.p7capplication/pkcs7-mime.p7mapplication/pkcs7-mime.p7rapplication/x-pkcs7-certreqresp.p7sapplication/pkcs7-signature.pc5application/x-pc5.pciapplication/x-pci.pclapplication/x-pcl.pcxapplication/x-pcx.pdfapplication/pdf.pdfapplication/pdf.pdxapplication/vnd.adobe.pdx.pfxapplication/x-pkcs12.pglapplication/x-pgl.picapplication/x-pic.pkoapplication/vnd.ms-pki.pko.plapplication/x-perl.plgtext/html.plsaudio/scpls.pltapplication/x-plt.pngimage/png.pngapplication/x-png.potapplication/vnd.ms-powerpoint.ppaapplication/vnd.ms-powerpoint.ppmapplication/x-ppm.ppsapplication/vnd.ms-powerpoint.pptapplication/vnd.ms-powerpoint.pptapplication/x-ppt.prapplication/x-pr.prfapplication/pics-rules.prnapplication/x-prn.prtapplication/x-prt.psapplication/x-ps.psapplication/postscript.ptnapplication/x-ptn.pwzapplication/vnd.ms-powerpoint.r3ttext/vnd.rn-realtext3d.raaudio/vnd.rn-realaudio.ramaudio/x-pn-realaudio.rasapplication/x-ras.ratapplication/rat-file.rdftext/xml.recapplication/vnd.rn-recording.redapplication/x-red.rgbapplication/x-rgb.rjsapplication/vnd.rn-realsystem-rjs.rjtapplication/vnd.rn-realsystem-rjt.rlcapplication/x-rlc.rleapplication/x-rle.rmapplication/vnd.rn-realmedia.rmfapplication/vnd.adobe.rmf.rmiaudio/mid.rmjapplication/vnd.rn-realsystem-rmj.rmmaudio/x-pn-realaudio.rmpapplication/vnd.rn-rn_music_package.rmsapplication/vnd.rn-realmedia-secure.rmvbapplication/vnd.rn-realmedia-vbr.rmxapplication/vnd.rn-realsystem-rmx.rnxapplication/vnd.rn-realplayer.rpimage/vnd.rn-realpix.rpmaudio/x-pn-realaudio-plugin.rsmlapplication/vnd.rn-rsml.rttext/vnd.rn-realtext.rtfapplication/msword.rtfapplication/x-rtf.rvvideo/vnd.rn-realvideo.samapplication/x-sam.satapplication/x-sat.sdpapplication/sdp.sdwapplication/x-sdw.sitapplication/x-stuffit.slbapplication/x-slb.sldapplication/x-sld.slkdrawing/x-slk.smiapplication/smil.smilapplication/smil.smkapplication/x-smk.sndaudio/basic.soltext/plain.sortext/plain.spcapplication/x-pkcs7-certificates.splapplication/futuresplash.spptext/xml.ssmapplication/streamingmedia.sstapplication/vnd.ms-pki.certstore.stlapplication/vnd.ms-pki.stl.stmtext/html.styapplication/x-sty.svgtext/xml.swfapplication/x-shockwave-flash.tdfapplication/x-tdf.tg4application/x-tg4.tgaapplication/x-tga.tifimage/tiff.tifapplication/x-tif.tiffimage/tiff.tldtext/xml.topdrawing/x-top.torrentapplication/x-bittorrent.tsdtext/xml.txttext/plain.uinapplication/x-icq.ulstext/iuls.vcftext/x-vcard.vdaapplication/x-vda.vdxapplication/vnd.visio.vmltext/xml.vpgapplication/x-vpeg005.vsdapplication/vnd.visio.vsdapplication/x-vsd.vssapplication/vnd.visio.vstapplication/vnd.visio.vstapplication/x-vst.vswapplication/vnd.visio.vsxapplication/vnd.visio.vtxapplication/vnd.visio.vxmltext/xml.wavaudio/wav.waxaudio/x-ms-wax.wb1application/x-wb1.wb2application/x-wb2.wb3application/x-wb3.wbmpimage/vnd.wap.wbmp.wizapplication/msword.wk3application/x-wk3.wk4application/x-wk4.wkqapplication/x-wkq.wksapplication/x-wks.wmvideo/x-ms-wm.wmaaudio/x-ms-wma.wmdapplication/x-ms-wmd.wmfapplication/x-wmf.wmltext/vnd.wap.wml.wmvvideo/x-ms-wmv.wmxvideo/x-ms-wmx.wmzapplication/x-ms-wmz.wp6application/x-wp6.wpdapplication/x-wpd.wpgapplication/x-wpg.wplapplication/vnd.ms-wpl.wq1application/x-wq1.wr1application/x-wr1.wriapplication/x-wri.wrkapplication/x-wrk.wsapplication/x-ws.ws2application/x-ws.wsctext/scriptlet.wsdltext/xml.wvxvideo/x-ms-wvx.xdpapplication/vnd.adobe.xdp.xdrtext/xml.xfdapplication/vnd.adobe.xfd.xfdfapplication/vnd.adobe.xfdf.xhtmltext/html.xlsapplication/vnd.ms-excel.xlsapplication/x-xls.xlwapplication/x-xlw.xmltext/xml.xplaudio/scpls.xqtext/xml.xqltext/xml.xquerytext/xml.xsdtext/xml.xsltext/xml.xslttext/xml.xwdapplication/x-xwd.x_bapplication/x-x_b.sisapplication/vnd.symbian.install.sisxapplication/vnd.symbian.install.x_tapplication/x-x_t.ipaapplication/vnd.iphone.apkapplication/vnd.android.package-archive.xapapplication/x-silverlight-app