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">

     <WatchedResource>WEB-INF/web.xmlWatchedResource>
 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>ssiservlet-name>
         <servlet-class>
           org.apache.catalina.ssi.SSIServlet
         servlet-class>
         <init-param>
           <param-name>bufferedparam-name>
           <param-value>1param-value>
         init-param>
         <init-param>
           <param-name>inputEncodingparam-name>
           <param-value>UTF-8param-value>
         init-param>
         <init-param>
           <param-name>outputEncodingparam-name>
           <param-value>UTF-8param-value>
         init-param>
         <init-param>
           <param-name>debugparam-name>
           <param-value>0param-value>
         init-param>
         <init-param>
           <param-name>expiresparam-name>
           <param-value>666param-value>
         init-param>
         <init-param>
           <param-name>isVirtualWebappRelativeparam-name>
           <param-value>falseparam-value>
         init-param>
         <load-on-startup>4load-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>ssiservlet-name>
         <url-pattern>*.shtmlurl-pattern>
         <url-pattern>*.htmlurl-pattern>
     servlet-mapping>