在tomcat的server.xml文件中配置如下红色部分，重启tomcat即可

<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 crossContext="true" debug="0" docBase="E:\文件位置1\文件1" path="/file1" reloadable="true"/>
               <Context crossContext="true" debug="0" docBase="E:\文件位置2\文件2" path="/file2" reloadable="true"/> 
　　　　　　　　　<Context crossContext="true" debug="0" docBase="E:\文件位置3\文件3" path="/file3" reloadable="true"/> 
</Host>