此處作一下小的彙總，
針對Jetty容器內，存在excel的xlsx文件直接經過連接的方式下載的時候，若是是在Chrome瀏覽器時，則直接觸發瀏覽器的下載行爲，
可是在IE11的瀏覽器上，則瀏覽器會直接進行打開該文件，重點是瀏覽器進行打開該文件的時候，打開後必然是亂碼的，這中狀況必然是錯誤的，
可是若是是xls的Excel文件也是就2007老版本的excel文件，則IE瀏覽器便會提示進行下載，因此緣由即是當瀏覽器支持該文件格式的預覽的時候，
則直接打開，不支持時則默認爲下載提示，（由於此處是直接訪問Jetty容器中的excel文件，而不是代碼中經過流的方式返回的文件流，若是是代碼中
返回文件流，則直接設置對應的response的響應類型爲download便可，但此處既然是經過Jetty默認的方式進行的文件下載，則1.更改Jetty的默認配置，
配置使其在下載指定類型的流文件時，使其重複瀏覽器的下載行爲，而並不是直接打開的行爲，2.則是設置瀏覽器IE的行爲，針對某一類型的文件流，默認不進行打開的設置，
此處使用設置Jetty方式進行調整，即設置Jetty的MIME協議類型映射，針對xls和xlsx文件類型，統一映射的MIME類型爲application/msexcel，
Jetty中的配置方式則爲：更改Jetty下etc目錄下的webDefault.xml的配置，增長MIME類型的協議映射，
截圖配置以下：
此處主要另外還說明一點則是：針對Jetty中間件對請求的編碼的映射，等等也是在該webdefault.xml中進行配置，如該文件中的： <locale-encoding-mapping-list>用於配置指定編碼映射，
可參考：https://www.cnblogs.com/gis2s/articles/3321893.html，包括對應的Jetty對靜態文件的緩存的去除也是能夠配置該文件的useFileMappedBuffer屬性，參考：
https://blog.csdn.net/wwsscc168/article/details/51095099，而對於配置當前Jetty對線程數量的支持，以及訪問的超時時間等，能夠詳細了接下jetty.xml的一些配置信息，
附上百度百科對MIME協議的講解截圖：
轉自：https://blog.csdn.net/wxwlife2006/article/details/8115273#commentBoxjavascript
這幾天一貫很納悶，在Tomcat安排的網站中的下載文件中，如果文件是rar類型的，一點擊下載rar文件就直接打開，而且呈現亂碼，右鍵另存爲瀏覽器也是默認爲html格局，一貫認爲是瀏覽器IE的題目，後來發明其實不關瀏覽器的題目，而是Tomcat辦事器設備的題目，具體以下：php
web.xml文件中設備<mime-mapping>下載文件類型
TOMCAT在默認景象下下載.rar的文件是把文件算做text打開，以致於IE打開RAR文件爲亂碼，如果碰到這種景象時沒必要認爲是瀏覽器的題目，大多半瀏覽器應當不會逝世皮賴臉地把二進制文件算做文本打開，通常都是辦事器給什麼瀏覽器就開什麼.解決辦法: css
打開conf/web.xml，參加下面的代碼. html
<mime-mapping> <extension>doc</extension> <mime-type>application/msword</mime-type> </mime-mapping> <mime-mapping> <extension>xls</extension> <mime-type>application/msexcel</mime-type> </mime-mapping> <mime-mapping> <extension>pdf</extension> <mime-type>application/pdf</mime-type> </mime-mapping> <mime-mapping> <extension>zip</extension> <mime-type>application/zip</mime-type> </mime-mapping> <mime-mapping> <extension>rar</extension> <mime-type>application/rar</mime-type> </mime-mapping> <mime-mapping> <extension>txt</extension> <mime-type>application/txt</mime-type> </mime-mapping> <mime-mapping> <extension>chm</extension> <mime-type>application/mshelp</mime-type> </mime-mapping> <mime-mapping> <extension>mp3</extension> <mime-type>audio/x-mpeg</mime-type> </mime-mapping>
重啓TOMCAT，清除IE緩存，再打開RAR的文件時就能夠正常下載了. java
不合的ContentType 會影響客戶端所看到的結果.web
默認的ContentType爲 text/html 也就是網頁格局.瀏覽器
代碼如:緩存
<％
response.ContentType
=
"
text/html
"
％>
<!--
＃i nclude virtual
=
"
/ContentType.html
"
-->
顯示的爲網頁，而app
<％
response.ContentType
=
"
text/plain
"
％>
<!--
＃i nclude virtual
=
"
/sscript/ContentType.html
"
-->
則會顯示html原代碼.koa
如下爲一些經常使用的 ContentType
GIF images
<％
response.ContentType
=
"
image/gif
"
％>
<!--
＃i nclude virtual
=
"
/myimage.gif
"
-->
JPEG images
<％
response.ContentType
=
"
image/jpeg
"
％>
<!--
＃i nclude virtual
=
"
/myimage.jpeg
"
-->
TIFF images
<％
response.ContentType
=
"
image/tiff
"
％>
<!--
＃i nclude virtual
=
"
/myimage.tiff
"
-->
MICROSOFT WORD document
<％
response.ContentType
=
"
application/msword
"
％>
<!--
＃i nclude virtual
=
"
/myfile.doc
"
-->
RTF document
<％
response.ContentType
=
"
application/rtf
"
％>
<!--
＃i nclude virtual
=
"
/myfile.rtf
"
-->
MICROSOFT EXCEL document
<％
response.ContentType
=
"
application/x-excel
"
％>
<!--
＃i nclude virtual
=
"
/myfile.xls
"
-->
MICROSOFT POWERPOINT document
<％
response.ContentType
=
"
application/ms-powerpoint
"
％>
<!--
＃i nclude virtual
=
"
/myfile.pff
"
-->
PDF document
<％
response.ContentType
=
"
application/pdf
"
％>
<!--
＃i nclude virtual
=
"
/myfile.pdf
"
-->
ZIP document
<％
response.ContentType
=
"
application/zip
"
％>
<!--
＃i nclude virtual
=
"
/myfile.zip
"
-->
下面是更具體的ContentType
application
/
andrew
-
inset ez application
/
mac
-
binhex40 hqx application
/
mac
-
compactpro cpt application
/
mathml
+
xml mathml application
/
msword doc application
/
octet
-
stream bin dms lha lzh exe
class
so dll application
/
oda oda application
/
ogg ogg application
/
pdf pdf application
/
postscript ai eps ps application
/
rdf
+
xml rdf application
/
smil smi smil application
/
srgs gram application
/
srgs
+
xml grxml application
/
vnd.mif mif application
/
vnd.mozilla.xul
+
xml xul application
/
vnd.ms
-
excel xls application
/
vnd.ms
-
powerpoint ppt application
/
vnd.wap.wbxml wbxml application
/
vnd.wap.wmlc .wmlc wmlc application
/
vnd.wap.wmlscriptc .wmlsc wmlsc application
/
voicexml
+
xml vxml application
/
x
-
bcpio bcpio application
/
x
-
cdlink vcd application
/
x
-
chess
-
pgn pgn application
/
x
-
cpio cpio application
/
x
-
csh csh application
/
x
-
director dcr dir dxr application
/
x
-
dvi dvi application
/
x
-
futuresplash spl application
/
x
-
gtar gtar application
/
x
-
hdf hdf application
/
x
-
httpd
-
php .php .php4 .php3 .phtml application
/
x
-
httpd
-
php
-
source .phps application
/
x
-
javascript js application
/
x
-
koan skp skd skt skm application
/
x
-
latex latex application
/
x
-
netcdf nc cdf application
/
x
-
pkcs7
-
crl .crl 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 .tgz tar application
/
x
-
tcl tcl application
/
x
-
tex tex application
/
x
-
texinfo texinfo texi application
/
x
-
troff t tr roff 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 .crt application
/
xhtml
+
xml xhtml xht application
/
xml xml xsl application
/
xml
-
dtd dtd application
/
xslt
+
xml xslt application
/
zip zip audio
/
basic au snd audio
/
midi mid midi kar audio
/
mpeg mpga mp2 mp3 audio
/
x
-
aiff aif aiff aifc audio
/
x
-
mpegurl m3u audio
/
x
-
pn
-
realaudio ram rm audio
/
x
-
pn
-
realaudio
-
plugin rpm audio
/
x
-
realaudio ra audio
/
x
-
wav wav chemical
/
x
-
pdb pdb chemical
/
x
-
xyz xyz image
/
bmp bmp image
/
cgm cgm image
/
gif gif image
/
ief ief image
/
jpeg jpeg jpg jpe image
/
png png image
/
svg
+
xml svg image
/
tiff tiff tif image
/
vnd.djvu djvu djv image
/
vnd.wap.wbmp .wbmp wbmp image
/
x
-
cmu
-
raster ras 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 model
/
iges igs iges model
/
mesh msh mesh silo model
/
vrml wrl vrml text
/
calendar ics ifb text
/
css css text
/
html .shtml html htm text
/
plain asc txt text
/
richtext rtx text
/
rtf rtf text
/
sgml sgml sgm text
/
tab
-
separated
-
values tsv text
/
vnd.wap.wml .wml wml text
/
vnd.wap.wmlscript .wmls wmls text
/
x
-
setext etx video
/
mpeg mpeg mpg mpe video
/
quicktime qt mov video
/
vnd.mpegurl mxu video
/
x
-
msvideo avi video
/
x
-
sgi
-
movie movie x
-
conference
/
x
-
cooltalk ice
TXT文件作下載的JS實現
<％...＠ page contentType="text/html; charset=gb2312" language="java" ％> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>無題目文檔</title> <script language="JavaScript">... function openfile（url） ...{ var a =window.open（url，"_blank"，""）; a.document.execCommand（"SaveAs"）; a.close（）; } </script> </head> <body> <p><a href="＃" onclick=""openfile（"aa.txt"）"">下載</a></p> </body> </html> 轉載請註明出處［http://samlin.cnblogs.com/］