@Component

    public static class CustomServletContainer implements EmbeddedServletContainerCustomizer{

     @Override

        public void customize(ConfigurableEmbeddedServletContainer container) {

            container.setPort();//配置端口

            container.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/404.html"));//配置错误页面

            container.setSessionTimeout(,TimeUnit.MINUTES);//配置用户会话过期时间

        }

    }

以Tomcat为例。

 @Bean

    public EmbeddedServletContainerFactory servletContainer() {

        TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory();

        factory.setPort();

        factory.setSessionTimeout(, TimeUnit.MINUTES);

        factory.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/404.html"));

        return factory;

    }

@FunctionalInterface

public interface WebServerFactoryCustomizer<T extends WebServerFactory> {

    void customize(T factory);

}

package springboot.configure;

import org.springframework.boot.web.server.ConfigurableWebServerFactory;

import org.springframework.boot.web.server.ErrorPage;

import org.springframework.boot.web.server.WebServerFactoryCustomizer;

import org.springframework.http.HttpStatus;

import org.springframework.stereotype.Component;

@Component

public class CustomServletContainer implements WebServerFactoryCustomizer<ConfigurableWebServerFactory>{

@Override

    public void customize(ConfigurableWebServerFactory factory) {

        factory.setPort();

        factory.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND,"/404.html"));

    }

}

@Bean

public ConfigurableServletWebServerFactory webServerFactory() {

    TomcatServletWebServerFactory factory = new TomcatServletWebServerFactory();

    factory.setPort();

    factory.setUriEncoding();//只能设置session，session过期时间只能在配置文件中配置

    return factory;

}