Java 实现浏览器下载文件及文件预览

插曲想记录一下，以后可以来粘贴复制用。

一、浏览器下载文件

setContentType() 该实体头的作用是让服务器告诉浏览器它发送的数据属于什么文件类型。

没有缓存

response.addHeader("Pargam", "no-cache");
response.addHeader("Cache-Control", "no-cache");
public static void setResponseHeader(HttpServletResponse response, String name) {

    try {
        name = new String(name.getBytes(), "ISO8859-1");
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }

    response.setContentType("application/docx");
    //要保存的文件名
    response.setHeader("Content-Disposition", "attachment;filename=" + name + ".docx");
    response.addHeader("Pargam", "no-cache");
    response.addHeader("Cache-Control", "no-cache");
}

二、浏览器预览文件只需要把下面这行注释就好

response.setHeader("Content-Disposition", "attachment;filename=" + name + ".docx");

setContentType() 中的参数选择：

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
.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 . application/x-
.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/x-silverlight-app

Java 后台字符串以txt文件响应到浏览器进行下载

String fileName = "短信模版.txt";
OutputStream os = null;
try {
    response.reset();
    response.setContentType("application/octet-stream; charset=utf-8");
    response.setHeader("Content-Disposition", "attachment; filename=" + new String(fileName.getBytes(),"ISO8859-1"));
    byte[] bytes = sb.toString().getBytes("GBK");
    os = response.getOutputStream();
    // 将字节流传入到响应流里,响应到浏览器
    os.write(bytes);
    os.close();
} catch (Exception ex) {
    logger.error("导出失败:", ex);
    throw new RuntimeException("导出失败");
}finally {
    try {
        if (null != os) {
            os.close();
        }
    } catch (IOException ioEx) {
        logger.error("导出失败:", ioEx);
    }
}

以上为个人经验，希望能给大家一个参考，也希望大家多多支持我们。

赞 (0)

相关推荐

  • Java后台Controller实现文件下载操作

    代码 参数: 1.filePath:文件的绝对路径(d:\download\a.xlsx) 2.fileName(a.xlsx) 3.编码格式(GBK) 4.response.request不介绍了,从控制器传入的http对象 代码片. //控制器 @RequestMapping(UrlConstants.BLACKLIST_TESTDOWNLOAD) public void downLoad(String filePath, HttpServletResponse response, Http

  • Java Web端程序实现文件下载的方法分享

    Web文件下载有两种,一种是文件在网站目录下,在浏览器中直接输入文件路径即可下载,如http://www.xxx.com/file.zip.另外一种是文件不在网站目录下或者文件是动态生成的(导出报表或者导出excel等),这种情况需要通过response的OutputStream实现文件的下载.DownloadUtils是一个Java Web文件下载工具类,提供多种静态方法实现文件下载. package com.rhui.util; import java.io.BufferedInputStr

  • JAVA读取文件流,设置浏览器下载或直接预览操作

    最近项目需要在浏览器中通过URL预览图片.但发现浏览器始终默认下载,而不是预览.研究了一下,发现了问题: // 设置response的Header,注意这句,如果开启,默认浏览器会进行下载操作,如果注释掉,浏览器会默认预览. response.addHeader("Content-Disposition", "attachment;filename=" + FileUtil.getOriginalFilename(path)); 然后需要注意: response.s

  • java的io操作(将字符串写入到txt文件中)

    复制代码 代码如下: import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.IOException;import java.io.PrintStream;import java.io.PrintWriter;import java.io.RandomAccessFile; public cla

  • Bootstrap fileinput文件上传预览插件使用详解

    Bootstrap fileinput文件上传预览插件使用详解

    介绍 通过本文,你可以学习到如何封装或者开发一个前端组件,同时学习Bootstrap-fileinput组件的使用,封装后使用更加简单方便. BaseFile是AdminEAP框架中基于Bootstrap-fileinput的附件上传组件,它支持 支持多文件.在线预览.拖拽上传等功能,封装后BaseFile主要包括以下功能: 弹出窗口的附件上传 当前界面的附件上传 显示附件明细 可编辑的附件明细(删除.预览.不可新增) 关于Bootstrap-fileinput的API文档可参考http://p

  • 基于bootstrap的上传插件fileinput实现ajax异步上传功能(支持多文件上传预览拖拽)

    基于bootstrap的上传插件fileinput实现ajax异步上传功能(支持多文件上传预览拖拽)

    首先需要导入一些js和css文件 <link href="__PUBLIC__/CSS/bootstrap.css" rel="external nofollow" rel="stylesheet"> <link type="text/css" rel="stylesheet" href="__PUBLIC__/CSS/fileinput.css" rel="

  • H5手机端多文件上传预览插件

    H5手机端多文件上传预览插件

    基于zepto,支持多文件上传,进度和图片预览,用于手机端. (function ($) { $.extend($, { fileUpload: function (options) { var para = { multiple: true, filebutton: ".filePicker", uploadButton: null, url: "/home/MUploadImg", filebase: "mfile",//mvc后台需要对应的

  • PHP从FLV文件获取视频预览图的方法

    本文实例讲述了PHP从FLV文件获取视频预览图的方法.分享给大家供大家参考.具体实现方法如下: 复制代码 代码如下: <?php // references http://www.longtailvideo.com/support/forum/Modules/12661/External-PHP-with-FFmpeg-using-readfile- // generate a preview image from an FLV file on-the-fly, or to save // ca

  • 教你3分钟利用原生js实现有进度监听的文件上传预览组件

    教你3分钟利用原生js实现有进度监听的文件上传预览组件

    前言 本文主要介绍如何使用原生js,通过面向对象的方式实现一个文件上传预览的组件,该组件利用FileReader来实现文件在前端的解析,预览,读取进度等功能,并对外暴露相应api来实现用户自定义的需求,比如文件上传,进度监听,自定义样式,读取成功回调等. 组件设计架构如下: 涉及的核心知识点如下: 闭包:减少变量污染,缩短变量查找范围 自执行函数 file API:对文件进行读取,解析,监控文件事件 DocumentFragment API:主要用来优化dom操作 minix :用来实现对象混合

  • vue项目中常见的三种文件类型在线预览实现(pdf/word/excel表格)

    目录 前言 一.预览word文件 1.安装 npm 依赖 2.预览在线地址文件 3.预览本地文件 二.预览excel表格 1.安装依赖 2.预览在线表格 三.pdf预览 1.安装依赖vue-pdf 2.在需要的页面注册 3.使用 4.加载本地pdf文件 5.解决pdf使用自定义字体预览和打印乱码问题:pdfjsWrapper.js 总结 前言 之前做PDF预览一直用的pdf.js,这次没有太多附加需求比较简单简,所以决定用vue-pdf这个组件,虽然说它没有原生那样强大,但已经满足常用的需求了,

  • JS端基于download.js实现图片、视频时直接下载而不是打开预览

    项目中的附件列表,通常情况都需要提供下载.删除的功能,功能本身没有什么要说的,都是基本功能,使用浏览器的的下载功能,也都是用window.open(url),或者window.location.href=url的方式,url即为附件下载接口,浏览器自动解析,如果是图片.视频.txt等格式的会直接预览文件,而不是像docx.xlsx一样直接下载,项目中为了功能明确,将预览单独加了一个查看按钮,下载按钮要实现无论什么文件格式都直接下载. 有两种方式处理: 一.后台接口层面处理:(比较常见) 响应头中

  • JetBrains发布java代码质量检测工具Qodana早期预览版

    JetBrains发布java代码质量检测工具Qodana早期预览版

    JetBrains正在开发一种被称为Qodana的代码质量检测工具.它将JetBrains IDE具有的智能代码检查带入了项目CI/CD管道中.它可以识别代码中的错误,安全漏洞,重复项和缺陷并提出修复建议.使开发人员轻松地改善代码结构,使代码符合众多准则和标准,解决潜在的性能问题. Qodana Qodana包括两个主要部分:一个精良的.无GUI的IntelliJ IDEA引擎,该引擎经过专门设计用于CI管道中,作为一种典型的"流水线"工具:另一个基于Web的交互式报表UI. 目前Qo

  • Java 实现浏览器下载文件及文件预览

    插曲想记录一下,以后可以来粘贴复制用. 一.浏览器下载文件 setContentType() 该实体头的作用是让服务器告诉浏览器它发送的数据属于什么文件类型. 没有缓存 response.addHeader("Pargam", "no-cache"); response.addHeader("Cache-Control", "no-cache"); public static void setResponseHeader(Ht

  • JavaScript File API文件上传预览

    JavaScript File API文件上传预览

    对于基于浏览器的应用而言,访问本地文件都是一件头疼的事情,通常我们能做的仅仅是使用<input type="file">标签来上传文件.实现过程是:选取文件的时候value 属性保存了用户指定的文件的名称,表单被提交的时候,浏览器会向服务器发送选中的文件的内容而不仅仅是发送文件名.再获取服务器返回的地址,然后做预览. 但是如果有一天我们要上传一个图片,传了图片后预览想换另一张图片,就又得先上传到服务器再预览.在网络比较慢的情况下,这样真的很折腾. 所以我们某些时候需要先预览

随机推荐