核心配置文件中的action：
??????????????? <action name="upload" class="g2w.struts2.FileUploadAction">
??????????????????????? <interceptor-ref name="fileUpload">
??????????????????????????????? <param name="allowedTypes">
??????????????????????????????? text/plain,text/css,text/javascript
??????????????????????????????? </param>
??????????????????????????????? <param name="maximumSize">1000000</param>
??????????????????????? </interceptor-ref>
??????????????????????? <interceptor-ref name="defaultStack" />
??????????????????????? <param name="savePath">/uploads</param>
??????????????????????? <result name="success">/success.jsp</result>
??????????????????????? <result name="error">/failure.jsp</result>
??????????????????????? <result name="input">/failure.jsp</result>
??????????????? </action>
类型对应关系如下：
??????????????? ".*"="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"
??????????????? ".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"
??????????????? ".cut"="application/x-cut"
??????????????? ".dbf"="application/x-dbf"
??????????????? ".dbm"="application/x-dbm"
??????????????? ".dbx"="application/x-dbx"
??????????????? ".dcd"="text/xml"
??????????????? ".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"
??????????????? ".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"
??????????????? ".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"
??????????????? ".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"
??????????????? ".html"="text/html"
??????????????? ".htt"="text/webviewhtml"
??????????????? ".htx"="text/html"
??????????????? ".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"
??????????????? ".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"
??????????????? ".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"
??????????????? ".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"
??????????????? ".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