Tomcat多域名及二级域名的配置

（1）开通泛域名支持，即java.book.cn,net.book.cn,www.books.cn都指向同一IP，如127.0.0.1
（2）修改tomcat目录下的conf/server.xml,在engine里面添加

<Host name="localhost" debug="0" appBase=""
       unpackWARs="true" 
       xmlValidation="false" xmlNamespaceAware="false">
       <Logger className="org.apache.catalina.logger.FileLogger"
                 directory="logs"  prefix="localhost_log." suffix=".txt"
            timestamp="true"/>
        <Context path="" docBase="E:\\Tomcat5.0\\webapps\\book"  reloadable="true" caseSensitive="false" debug="0"></Context>
 </Host>

 <Host name="java.book.cn" debug="0" appBase=""
       unpackWARs="true" 
       xmlValidation="false" xmlNamespaceAware="false">
       <Alias>java.book.cn</Alias>
       <Context path="" docBase="E:\\Tomcat5.0\\webapps\\java"  reloadable="true" caseSensitive="false" debug="0"></Context>
 </Host>

 <Host name="net.book.cn" debug="0" appBase=""
       unpackWARs="true" 
       xmlValidation="false" xmlNamespaceAware="false">
       <Alias>net.book.cn</Alias>
       <Context path="" docBase="E:\\Tomcat5.0\\webapps\\net"  reloadable="true" caseSensitive="false" debug="0"></Context>
 </Host>

  <Host name="www.books.cn" debug="0" appBase=""
       unpackWARs="true" 
       xmlValidation="false" xmlNamespaceAware="false">
       <Alias>www.books.cn</Alias>
       <Context path="" docBase="E:\\Tomcat5.0\\webapps\\books"  reloadable="true" caseSensitive="false" debug="0"></Context>
 </Host>