Tomcat7开启SSI功能

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

<Context privileged="true">  
    <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>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>  
        <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>  
        <load-on-startup>4</load-on-startup>  
    </servlet>

3、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>