java 下载文件设置文件名

怎么的下载方式、方法。

你在后台设置一个，

<%

response.setContentType(fileminitype)

response.setHeader("Location",filename)

response.setHeader("Cache-Control", "max-age=" + cacheTime)

response.setHeader("Content-Disposition", "attachmentfilename=" + filename)//filename应该是编码后的(utf-8)

response.setContentLength(filelength)

OutputStream outputStream = response.getOutputStream()

InputStream inputStream = new FileInputStream(filepath)

byte[] buffer = new byte[1024]

int i = -1

while ((i = inputStream.read(buffer)) != -1) {

outputStream.write(buffer, 0, i)

}

outputStream.flush()

outputStream.close()

inputStream.close()

outputStream = null

%>

1. 核心代码

//设置Mime-Type

response.setContentType("application/msword")

//设置下载默认文件名

response.setHeader("Content-Disposition", "attachmentfilename=123.doc")

登录后复制

完整代码

public R<Object>download(@PathVariable String id, HttpServletResponse response) {

File uploadFile = new File(id + ".doc")

//获取后缀名

String suffix = uploadFile.substring(uploadFile.lastIndexOf("."))

String responseType = ResponseTypeUtils.getResponseContentByType(suffix)

response.setContentType(responseType)

response.setHeader("Content-Disposition", "attachmentfilename=" + System.currentTimeMillis() + suffix)

//输入流,通过输入流读取文件内容

try (FileInputStream fileInputStream = new FileInputStream(uploadFile)) {

ServletOutputStream outputStream = response.getOutputStream()

int len

byte[] bytes = new byte[1024]

while ((len = fileInputStream.read(bytes)) != -1) {

outputStream.write(bytes, 0, len)

//刷新一下

outputStream.flush()

}

//关闭资源

outputStream.close()

return R.ok()

} catch (Exception e) {

throw new RuntimeException(e.getMessage(), e)

}

}

登录后复制

当然也可以通过NIO的方式实现代码，具体可参见HttpServletResponse 返回图片的几种方法对比，核心代码如下：

fis.getChannel().transferTo(0,fis.available(),Channels.newChannel(response.getOutputStream()))

登录后复制

3 参考状态码

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 .tif image/tiff

.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

.docx application/msword .xlsx application/vnd.ms-excel

.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 .pptx application/vnd.ms-powerpoint

.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

.sis application/vnd.symbian.install .sisx application/vnd.symbian.install

.x_t application/x-x_t .ipa application/vnd.iphone

.apk application/vnd.android.package-archive .xap application

1、首先我们客户端下载文件，是从服务器上面下载的。是不允许我们 *** 作客户端的文件的以下是设置服务器端的文件路径。

response.reset()

response.setCharacterEncoding("UTF-8")

response.setHeader("Content-disposition", "attachment filename=InspectionExcel.xlsx") // 设定输出文件头

response.setHeader("Set-Cookie", "fileDownload=true path=/")

response.setContentType("application/msexcel")

OutputStream os = null

try {

DownFile openFile = new DownFile()

String fileExcel = openFile.fileLookForWord(request, response)// 服务器目录

os = new FileOutputStream(fileExcelPath)

incomingQualityManageService.exportInspectionExcel(itemCode, cateGory, cateName, supplierMan, poNum,

receiveNum, porject, beginDate, endDate, null, "N", os)

} finally {

if (os != null) {

os.close()

}

}

2、实在要控制的话，可以用applet技术，但是有比较大的局限性。需要的话可以私聊我。

---