1.若要使tomcat使用80端口，确保80端口可用
2.修改tomcat的 conf/server.xml
 <Connector port="8080" ==> <Connector port="80"
3. <Engine name="Catalina" defaultHost="localhost">
 添加<Host name="www.hi.com" debug="0" appBase="webapps" unpackWARs="true" autoDeploy="true">
<Context path="" docBase="D:/tomcat-6.0.16/1webapps/jforum" debug="0" reloadable="true"/>
</Host>

<Host name="www.hello.com" debug="0" appBase="webapps" unpackWARs="true" autoDeploy="true">
<Context path="" docBase="E:/eclipse/ws/pm/WebContent" debug="0" reloadable="true"/>
</Host>

其中D:/tomcat-6.0.16/1webapps/jforum，E:/eclipse/ws/pm/WebContent是2个web应用程序

这样 D:/tomcat-6.0.16/1webapps/jforum对应的web应用使用http://www.hi.com访问
这样 E:/eclipse/ws/pm/WebContent对应的web应用使用http://www.hello.com访问

测试通过

===============================================================================================
http://dg.lawyer.com的配置
conf/server.xml中添加：
<Host name="dg......com" debug="0" appBase="webapps" unpackWARs="true" autoDeploy="true">
<Context path="" docBase="dgpx系统的目录" debug="0" reloadable="true"/>
</Host>