web.xml配置mapping 页面直接配置路径就可下载
<mime-mapping>
<extension>doc</extension>
<mime-type>application/msword;chartset=UTF-8</mime-type>
</mime-mapping>
<mime-mapping>
<extension>docx</extension>
<mime-type>application/vnd.openxmlformats-officedocument.wordprocessingml.document;chartset=UTF-8</mime-type>
</mime-mapping>
<mime-mapping>
<extension>xlsx</extension>
<mime-type>application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;chartset=UTF-8</mime-type>
</mime-mapping>
<mime-mapping>
<extension>html</extension>
<mime-type>text/html;charset=UTF-8</mime-type>
</mime-mapping>
<mime-mapping>
<extension>ppt</extension>
<mime-type>application/vnd.ms-powerpoint</mime-type>
</mime-mapping>
<mime-mapping>
<extension>xls</extension>
<mime-type>application/vnd.ms-excel</mime-type>
</mime-mapping>
<mime-mapping>
<extension>rar</extension>
<mime-type>application/octet-stream</mime-type>
</mime-mapping>
<mime-mapping>
<extension>sep</extension>
<mime-type>application/sep</mime-type>
</mime-mapping>
<mime-mapping>
<extension>gd</extension>
<mime-type>application/sep</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pdf</extension>
<mime-type>application/pdf</mime-type>
</mime-mapping>