Spring Boot中以代码方式配置Tomcat

在Spring Boot2.0以上配置嵌入式Servlet容器时EmbeddedServletContainerCustomizer类不存在，经网络查询发现被WebServerFactoryCustomizer替代.

Spring Boot 1.0中:

通用配置举例

@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
        }

    }

特定配置举例

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;
    }

在springboot2.0之后

@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;
}