Tomcat7开启SSI功能

1.官方参考文档地址：

http://httpd.apache.org/docs/current/howto/ssi.html#basicssidirectives

https://tomcat.apache.org/tomcat-7.0-doc/ssi-howto.html

2.配置步骤

（1）修改tomcat根目录下的conf文件夹中的context.xml，修改如下：

<Context privileged="true">
    <!-- Default set of monitored resources -->
    <WatchedResource>WEB-INF/web.xml</WatchedResource>
</Context>

 即在Context 中增加privileged="true"

（2）修改tomcat根目录下的conf文件夹中的web.xml，将SSI的Servlet的配置取消注释，并增加编码配置，否则可能出现乱码

<servlet>
        <servlet-name>ssi</servlet-name>
        <servlet-class>
          org.apache.catalina.ssi.SSIServlet
        </servlet-class>
        <init-param>
          <param-name>buffered</param-name>
          <param-value>1</param-value>
        </init-param>
        <init-param>
          <param-name>inputEncoding</param-name>
          <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
          <param-name>outputEncoding</param-name>
          <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
          <param-name>debug</param-name>
          <param-value>0</param-value>
        </init-param>
        <init-param>
          <param-name>expires</param-name>
          <param-value>666</param-value>
        </init-param>
        <init-param>
          <param-name>isVirtualWebappRelative</param-name>
          <param-value>false</param-value>
        </init-param>
        <load-on-startup>4</load-on-startup>
    </servlet>

 取消SSI Servlet的mapping注释，增加*.html，因为我们是在html中引入shtml的，如果不配置*.html，则tomcat不会处理html中的ssi指令

<servlet-mapping>
        <servlet-name>ssi</servlet-name>
        <url-pattern>*.shtml</url-pattern>
        <url-pattern>*.html</url-pattern>
    </servlet-mapping>