一臺linux 伺服器要同時開放兩個埠比如：http：80，https:443，那麼首先需要修改配置檔案

1、vi /etc/sysconfig/iptables

2、新增80和443埠號，如下：

# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 21 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 23 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT

COMMIT

3、讓修改的配置檔案生效

service iptables restart

4、程式裡監聽80埠和443埠，並實現http跳轉https服務，程式碼如下：

package com.qzt.config.https;

import org.apache.catalina.Context;
import org.apache.catalina.connector.Connector;
import org.apache.coyote.http11.Http11NioProtocol;
import org.apache.tomcat.util.descriptor.web.SecurityCollection;
import org.apache.tomcat.util.descriptor.web.SecurityConstraint;
import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
import org.springframework.boot.context.embedded.tomcat.TomcatConnectorCustomizer;
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * Created by lijj on 7/28/17.
 */
@Configuration
public class HttpsConfiguration {

    @Bean
    public EmbeddedServletContainerFactory servletContainer() {
        TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory() {
            @Override
            protected void postProcessContext(Context context) {
                SecurityConstraint constraint = new SecurityConstraint();
                constraint.setUserConstraint("CONFIDENTIAL");
                SecurityCollection collection = new SecurityCollection();
                collection.addPattern("/*");
                constraint.addCollection(collection);
                context.addConstraint(constraint);
            }
        };
        tomcat.addAdditionalTomcatConnectors(httpConnector());
        tomcat.addConnectorCustomizers(new MyTomcatConnectorCustomizer());
        return tomcat;
    }

    @Bean
    public Connector httpConnector() {
        Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
        connector.setScheme("http");
        //Connector監聽的http的埠號
        connector.setPort(80);
        connector.setSecure(false);
        //監聽到http的埠號後轉向到的https的埠號
        connector.setRedirectPort(443);
        return connector;
    }
}
class MyTomcatConnectorCustomizer implements TomcatConnectorCustomizer  
{  
    public void customize(Connector connector)  
    {  
        Http11NioProtocol protocol = (Http11NioProtocol) connector.getProtocolHandler();  
        //設定最大連線數  
//        protocol.setMaxConnections(2000);  
        //設定最大執行緒數  
//        protocol.setMaxThreads(2000);  
        protocol.setConnectionTimeout(8000);  //解決Slow HTTP Denial of Service Attack漏洞
    }  
}