下载的文件自动装配相应的mime后缀

<!-- web.xml文件中配置为下载的文件自动装配相应的mime后缀 -->

    <mime-mapping> 

        <extension>doc</extension> 

        <mime-type>application/vnd.ms-word</mime-type>   

    </mime-mapping> 

    <mime-mapping> 

        <extension>xls</extension> 

        <mime-type>application/msexcel</mime-type> 

    </mime-mapping> 

    <mime-mapping>   

      <extension>ppt</extension> 

      <mime-type>application/vnd.ms-powerpoint</mime-type> 

    </mime-mapping> 

    <mime-mapping> 

        <extension>docx</extension> 

        <mime-type>application/vnd.openxmlformats-officedocument.wordprocessingml.document</mime-type> 

    </mime-mapping> 

    <mime-mapping> 

        <extension>pptx</extension> 

        <mime-type>application/vnd.openxmlformats-officedocument.presentationml.presentation</mime-type> 

    </mime-mapping> 

    <mime-mapping> 

        <extension>xlsx</extension> 

        <mime-type>application/vnd.openxmlformats-officedocument.spreadsheetml.sheet</mime-type> 

    </mime-mapping>