上一篇說的將非Spring Boot專案註冊到Eureka Server並提供服務也說到，配置檔案裡eureka.port必須要與本機tomcat埠號相同，但不同環境往往有不同的tomcat埠號，以往我使用不同環境的配置檔案以確保eureka服務埠與tomcat一致。

1.讀tomcat配置檔案

這是最先想到的方法，通過classpath一層層找到conf下的server.xml拿埠號，因為路徑基本不會變，所以也是一種方法，由於發現了更好的方法，此處並無程式碼…

2.通過Jmx 的MBeanServer

package com.kowalski.demo;

import javax.management
 
.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.Query;
import java.lang.management.ManagementFactory;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Set;

public class IPAddressKowalski{
    public static String getIpAddressAndPort() throws MalformedObjectNameException, NullPointerException,
            UnknownHostException {
        MBeanServer beanServer = ManagementFactory.getPlatformMBeanServer
 
();
        Set<ObjectName> objectNames = beanServer.queryNames(new ObjectName("*:type=Connector,*"),
                Query.match(Query.attr("protocol"), Query.value("HTTP/1.1")));
        String host = InetAddress.getLocalHost().getHostAddress();
        String port = objectNames.iterator().next
 
().getKeyProperty("port");
        String ipadd = "http" + "://" + host + ":" + port;
        System.out.println(ipadd);
        return ipadd;
    }

    public static int getTomcatPort() throws MalformedObjectNameException, NullPointerException {
        MBeanServer beanServer = ManagementFactory.getPlatformMBeanServer();
        Set<ObjectName> objectNames = beanServer.queryNames(new ObjectName("*:type=Connector,*"),
                Query.match(Query.attr("protocol"), Query.value("HTTP/1.1")));
        String port = objectNames.iterator().next().getKeyProperty("port");

        return Integer.valueOf(port);
    }
}

那麼之前寫的將非Boot專案註冊到eureka server上怎麼動態的拿tomcat埠號呢：

在之前的MyInstanceConfig 中加入方法：

/***
     *獲取本機啟動中tomcat埠號
     * @return
     */
    @Override
    public int getNonSecurePort(){
        int tomcatPort;
        try {
            MBeanServer beanServer = ManagementFactory.getPlatformMBeanServer();
            Set<ObjectName> objectNames = beanServer.queryNames(new ObjectName("*:type=Connector,*"),
                    Query.match(Query.attr("protocol"), Query.value("HTTP/1.1")));

            tomcatPort = Integer.valueOf(objectNames.iterator().next().getKeyProperty("port"));
        }catch (Exception e){
            return super.getNonSecurePort();
        }
        return tomcatPort;
    }

這裡的getNonSecurePort其實就是config.properties裡面配置的eureka.port可以在PropertiesInstanceConfig的init方法中找到