<Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">


        <!-- SingleSignOn valve, share authentication between web applications
             Documentation at: /docs/config/valve.html -->
        <!--
        <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
        -->


        <!-- Access log processes all example.
             Documentation at: /docs/config/valve.html
             Note: The pattern used is equivalent to using pattern="common" -->
        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
               prefix="localhost_access_log" suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />
        <Context path="" docBase="/home/tomcat/apache-tomcat-9.0.0.M22/webapps/myproject"></Context>

      </Host>

上面appBase是放web專案的路徑，unpackWARs是否自動解壓war包，autoDeploy是否自動部署，Context是我新加的，path表示網址後面的專案路徑，docBase表示linux存放web專案的路徑，兩者相對應。