http转向https

很多时候我们在地址栏输入的是http，但是会自动转向到https，要实现这个功能，我们需要配置TomcatServletWebServerFactory 书上讲的是 EmbeddedServletContainerFactory， 但是现在已经不用了。
直接贴代码吧，我也是代码上试验的

@Bean
public TomcatServletWebServerFactory servletContainer() {
    TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory() {
        @Override
        protected void postProcessContext(Context context) {
            SecurityConstraint securityConstant = new SecurityConstraint();
            securityConstant.setUserConstraint("CONFIDENTIAL");
            SecurityCollection securityCollection = new SecurityCollection();
            securityCollection.addPattern("/*");
            securityConstant.addCollection(securityCollection);
            context.addConstraint(securityConstant);
        }
    };

    tomcat.addAdditionalTomcatConnectors(httpConnector());
    return tomcat;
}

@Bean
public Connector httpConnector() {
    Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
    connector.setScheme("http");
    connector.setPort(8080);
    connector.setSecure(false);
    connector.setRedirectPort(8443);
    return connector;
}

此时访问 http://localhost:8080 就会自动转到 https://localhost:8443