购买域名。示例：example.com

设置多个二级域名。如图：

配置tomcat文件：

1. 修改tomcat/conf目录下的server.xml文件：

   1. 如下配置配置了3个容器，使用三个不同的端口。
   2. 请注意三点：①端口号：Connector port；②容器名称：portservice name；③项目存放地址：Host appBase；
   3. 示例配置如下，可直接使用。

      <Service name="Catalina">
          <Connector port="8080" protocol="HTTP/1.1"
                     connectionTimeout="20000"
                     redirectPort="8443" />
          <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
          <Engine name="Catalina" defaultHost="localhost">
            <Realm className="org.apache.catalina.realm.LockOutRealm">
              <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                     resourceName="UserDatabase"/>
            </Realm>
            <Host name="localhost"  appBase="webapps"
                  unpackWARs="true" autoDeploy="true">
              <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" />
            </Host>
          </Engine>
        </Service>
      
        <Service name="Catalina1">
          <Connector port="8081" protocol="HTTP/1.1"
                     connectionTimeout="20000"
                     redirectPort="8443" />
          <Connector port="8010" protocol="AJP/1.3" redirectPort="8443" />
          <Engine name="Catalina1" defaultHost="localhost">
            <Realm className="org.apache.catalina.realm.LockOutRealm">
              <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                     resourceName="UserDatabase"/>
            </Realm>
            <Host name="localhost"  appBase="webapps1"
                  unpackWARs="true" autoDeploy="true">
              <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" />
            </Host>
          </Engine>
        </Service>
      
        <Service name="Catalina2">
          <Connector port="8082" protocol="HTTP/1.1"
                     connectionTimeout="20000"
                     redirectPort="8443" />
          <Connector port="8011" protocol="AJP/1.3" redirectPort="8443" />
          <Engine name="Catalina1" defaultHost="localhost">
            <Realm className="org.apache.catalina.realm.LockOutRealm">
              <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                     resourceName="UserDatabase"/>
            </Realm>
            <Host name="localhost"  appBase="webapps2"
                  unpackWARs="true" autoDeploy="true">
              <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" />
            </Host>
          </Engine>
        </Service>

2. 在tomcat根目录下，复制webapps文件夹，并在tomcat根目录下粘贴两份，分别命名为：webapps1和webapps2。注意此文件夹名称需要与第一步server.xml中添加的Host appBase名称一致。示例图如下：

   • 

3. 在tomcat/conf文件夹下，复制Catalina，并在tomcat/conf目录下粘贴两份（Catalina文件夹下的localhost文件夹不要更改名称，否则server.xml所添加的配置也需要改动。为不引起麻烦事，建议直接复制Catalina文件夹即可），分别命名为：Catalina1和Catalina2，注意此文件夹命名需要与第一步server.xml中添加的portservice name名称一致。示例图如下：

   • 

配置Nginx反向代理：修改nginx/conf目录下的nginx.conf文件，添加反向代理配置与虚拟主机配置：

#反向代理
    upstream www.example.com{
        server ;    #主机ip+端口号
    }
    upstream me.example.com{
        server ;
    }
    upstream dev.example.com{
        server ;
    }

#配置虚拟主机
    server {
        listen ;
        server_name www.example.com;
        index index.jsp index.html index.htm; 

        #include proxy-pass-php.conf;

        location / {
                proxy_pass http://www.example.com;    #与server_name保持一致
                proxy_set_header Host $http_host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
        access_log  /home/wwwlogs/www.example.com.log;
    } 

    server {
        listen ;
        server_name me.example.com;
        index index.jsp index.html index.htm; 

        #include proxy-pass-php.conf;

        location / {
                proxy_pass http://me.example.com;
                proxy_set_header Host $http_host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
        access_log  /home/wwwlogs/me.example.com.log;
    } 

    server {
        listen ;
        server_name dev.example.com;
        index index.jsp index.html index.htm; 

        #include proxy-pass-php.conf;

        location / {
                proxy_pass http://dev.example.com;
                proxy_set_header Host $http_host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
        access_log  /home/wwwlogs/dev.example.com.log;
    }  

include vhost/*.conf;

完成配置后，在tomcat中分别于webapps、webapps1、webapps2文件夹下部署三个不同的项目，项目名称都命名为ROOT.war。启动tomcat，分别访问www.example.com、me.example.com、dev.example.com即可。