当我在web-inf文件夹中有多个.properties文件时，如何使用servlet获取适当的.properties文件？

<param-name>Language</param-name>
    <param-value>en</param-value>
</context-param>
<context-param>
    <param-name>Country</param-name>
    <param-value>US</param-value>
</context-param>
<context-param>
    <param-name>Language</param-name>
    <param-value>jp</param-value>
</context-param>
<context-param>
    <param-name>Country</param-name>
    <param-value>JP</param-value>
</context-param>
<param-name>Language</param-name>
    <param-va