这几天一直很纳闷，在Tomcat部署的网站中的下载文件中，如果文件是rar类型的，一点击下载rar文件就直接打开，并且出现乱码，右键另存为浏览器也是默认为html格式，一直以为是浏览器IE的问题，后来发现其实不关浏览器的问题，而是Tomcat服务器配置的问题，具体如下：
web.xml文件中配置<mime-mapping>下载文件类型
TOMCAT在默认情况下下载.rar的文件是把文件当作text打开,以至于IE打开RAR文件为乱码,如果遇到这种情况时不必认为是浏览器的问题,大多数浏览器应该不会死皮赖脸地把二进制文件当作文本打开,一般都是服务器给什么浏览器就开什么.解决方法:
打开conf/web.xml,加入下面的代码.
<
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
>
重启TOMCAT,清除IE缓存,再打开RAR的文件时就可以正常下载了.
不同的ContentType 会影响客户端所看到的效果.
默认的ContentType为 text/html 也就是网页格式.
代码如:
<%
response.ContentType
=
"
text/html
"
%>
<!--
＃i nclude virtual
=
"
/ContentType.html
"
-->
显示的为网页,而
<%
response.ContentType
=
"
text/plain
"
%>
<!--
＃i nclude virtual
=
"
/sscript/ContentType.html
"
-->
则会显示html原代码.
以下为一些常用的 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
"
-->
下面是更详细的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 