ie直接下载rar文件乱码形式直接打开

在jsp里面有a href直接连接文件下载，部分文件不能下载，直接以乱码形式打开

问题：<a href="/files/a.zip">文件下载</a> 点击直接下载成功
      <a href="/files/b.rar">文件下载</a> 点击直接下载失败，乱码形式直接打开

最开始以为是浏览器设置的问题，后来发现不是，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>rar</extension>
        <mime-type>application/rar</mime-type>
    </mime-mapping>

在web.xml里面有很多，可以加很多类似的代码：

 <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>

重启问题解决。

其实这个属性在页面上可以直接设置，
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" -->

<meta http-equiv="Content-Type" CONTENT="text/html; charset=UTF-8">

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  
 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