Веб-приложение по умолчанию в tomcat

Я смог сделать это, добавив элемент «Контекст» с атрибутом path = «» в разделе «Хост» в файле server.xml.

            <Context path="" docBase="/usr/local/tomcat/mywebapps/myapplication">
                <WatchedResource>WEB-INF/web.xml</WatchedResource>
            </Context>

Примечание. Я использую Tomcat 7. Также мне пришлось переместить свое веб-приложение в другое место, чем папка веб-приложений по умолчанию. Я также удалил веб-приложения по умолчанию, предоставленные tomcat. Но это решение работает даже без их удаления.

Вот содержимое моего server.xml для справки. Надеюсь это поможет.

<?xml version='1.0' encoding='utf-8'?>
<!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor 
    license agreements. See the NOTICE file distributed with this work for additional 
    information regarding copyright ownership. The ASF licenses this file to 
    You under the Apache License, Version 2.0 (the "License"); you may not use 
    this file except in compliance with the License. You may obtain a copy of 
    the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required 
    by applicable law or agreed to in writing, software distributed under the 
    License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS 
    OF ANY KIND, either express or implied. See the License for the specific 
    language governing permissions and limitations under the License. -->
<!-- Note: A "Server" is not itself a "Container", so you may not define 
    subcomponents such as "Valves" at this level. Documentation at /docs/config/server.html -->
<Server port="8005" shutdown="SHUTDOWN">
    <!-- Security listener. Documentation at /docs/config/listeners.html <Listener 
        className="org.apache.catalina.security.SecurityListener" /> -->
    <!--APR library loader. Documentation at /docs/apr.html -->
    <Listener className="org.apache.catalina.core.AprLifecycleListener"
        SSLEngine="on" />
    <!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->
    <Listener className="org.apache.catalina.core.JasperListener" />
    <!-- Prevent memory leaks due to use of particular java/javax APIs -->
    <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
    <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
    <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />

    <!-- Global JNDI resources Documentation at /docs/jndi-resources-howto.html -->
    <GlobalNamingResources>
        <!-- Editable user database that can also be used by UserDatabaseRealm 
            to authenticate users -->
        <Resource name="UserDatabase" auth="Container"
            type="org.apache.catalina.UserDatabase" description="User database that can be updated and saved"
            factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
            pathname="conf/tomcat-users.xml" />
    </GlobalNamingResources>

    <!-- A "Service" is a collection of one or more "Connectors" that share 
        a single "Container" Note: A "Service" is not itself a "Container", so you 
        may not define subcomponents such as "Valves" at this level. Documentation 
        at /docs/config/service.html -->
    <Service name="Catalina">

        <!--The connectors can use a shared executor, you can define one or more 
            named thread pools -->
        <!-- <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="150" 
            minSpareThreads="4"/> -->


        <!-- A "Connector" represents an endpoint by which requests are received 
            and responses are returned. Documentation at : Java HTTP Connector: /docs/config/http.html 
            (blocking & non-blocking) Java AJP Connector: /docs/config/ajp.html APR (HTTP/AJP) 
            Connector: /docs/apr.html Define a non-SSL HTTP/1.1 Connector on port 8080 -->
        <Connector port="80" protocol="HTTP/1.1" connectionTimeout="20000"
            redirectPort="443" />
        <!-- A "Connector" using the shared thread pool -->
        <!-- <Connector executor="tomcatThreadPool" port="80" protocol="HTTP/1.1" 
            connectionTimeout="20000" redirectPort="443" /> -->
        <!-- Define a SSL HTTP/1.1 Connector on port 8443 This connector uses the 
            JSSE configuration, when using APR, the connector should be using the OpenSSL 
            style configuration described in the APR documentation -->
        <!-- <Connector port="443" protocol="HTTP/1.1" SSLEnabled="true" maxThreads="150" 
            scheme="https" secure="true" clientAuth="false" sslProtocol="TLS" /> -->

        <!-- Define an AJP 1.3 Connector on port 8009 -->
        <Connector port="8009" protocol="AJP/1.3" redirectPort="443" />


        <!-- An Engine represents the entry point (within Catalina) that processes 
            every request. The Engine implementation for Tomcat stand alone analyzes 
            the HTTP headers included with the request, and passes them on to the appropriate 
            Host (virtual host). Documentation at /docs/config/engine.html -->

        <!-- You should set jvmRoute to support load-balancing via AJP ie : <Engine 
            name="Catalina" defaultHost="localhost" jvmRoute="jvm1"> -->
        <Engine name="Catalina" defaultHost="localhost">

            <!--For clustering, please take a look at documentation at: /docs/cluster-howto.html 
                (simple how to) /docs/config/cluster.html (reference documentation) -->
            <!-- <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> -->

            <!-- Use the LockOutRealm to prevent attempts to guess user passwords 
                via a brute-force attack -->
            <Realm className="org.apache.catalina.realm.LockOutRealm">
                <!-- This Realm uses the UserDatabase configured in the global JNDI resources 
                    under the key "UserDatabase". Any edits that are performed against this UserDatabase 
                    are immediately available for use by the Realm. -->
                <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                    resourceName="UserDatabase" />
            </Realm>

            <Host name="localhost">

                <!-- 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" resolveHosts="false" />

                <Context path="" docBase="/usr/local/tomcat/mywebapps/myapplication">
                    <WatchedResource>WEB-INF/web.xml</WatchedResource>
                </Context>

            </Host>
        </Engine>
    </Service>
</Server>

Удалите папку Tomcat/webapps/ROOT (если есть), переименуйте файл WAR в ROOT.war и перезапустите.

вы можете переименовать свое веб-приложение в ROOT (приложение по умолчанию для tomcat), или вы можете использовать веб-сервер, который может обрабатывать доменные имена и перенаправления (например, https-сервер apache), и настроить там свой сайт.

Первый подход не очень элегантный, но зато быстрый и эффективный.

создайте index.html в webapps/ROOT ниже.

<html>

<head>
    <meta http-equiv="refresh" content=0;URL="http://localhost/myapp">
</head>

<body>
</body>

</html>