Spring Boot 2中缺少TomcatEmbeddedServletContainerFactory

Spring Boot 2中缺少TomcatEmbeddedServletContainerFactory

在Spring boot 2.0.0.RELEASE中，你可以替换为以下代码：

@Beanpublic ServletWebServerFactory servletContainer() {    TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory() {        @Override        protected void postProcessContext(Context context) { SecurityConstraint securityConstraint = new SecurityConstraint(); securityConstraint.setUserConstraint("CONFIDENTIAL"); SecurityCollection collection = new SecurityCollection(); collection.addPattern("/*"); securityConstraint.addCollection(collection); context.addConstraint(securityConstraint);        }    };    tomcat.addAdditionalTomcatConnectors(redirectConnector());    return tomcat;}private Connector redirectConnector() {    Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");    connector.setScheme("http");    connector.setPort(8080);    connector.setSecure(false);    connector.setRedirectPort(8443);    return connector;}