tomcat部署war包访问显示404

在eclipse导出的maven项目war包，放到tomcat下启动，顺利启动且无报错，但是浏览器访问该项目时显示404

原因：未在server.xml中配置这几个项目，导致服务器查找不到

解决方法：

 <Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="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" pattern="%h %l %u %t &quot;%r&quot; %s %b" prefix="localhost_access_log." suffix=".txt"/>

        <Context docBase="cas-server-webapp" path="/cas" reloadable="true"/>
        <Context docBase="portal" path="/portal" reloadable="true"/>
        <Context docBase="workflow-design" path="/workflow-design" reloadable="true" />

      </Host>

server.xml中使用<Context />元素将项目引入。