将web服务器端口更改为80端口

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

      <Context path="/itcast" docBase="D:\tomcat\apache-tomcat-7.0.32\webapps\ROOT\">


        <!-- 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" />

      </Host>