tomcat,jboss,jetty访问出现404错误问题记录

原因是WEB-INF下面缺少jboss-web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jboss-web PUBLIC "-//JBoss//DTD Web Application 2.4//EN" "http://www.jboss.org/j2ee/dtd/jboss-web_4_0.dtd">

<jboss-web>
    <context-root>/</context-root>
</jboss-web>

jetty对应的是jetty-web.xml:

<?xml version="1.0" encoding="ISO-8859-1"?>  
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://jetty.mortbay.org/configure.dtd">
<Configure class="org.mortbay.jetty.webapp.WebAppContext">
    <Set name="contextPath">/</Set>
</Configure>