在SpringBoot1.5的http转https见：
https://www.cnblogs.com/xxt19970908/p/6736370.html
升级到SpringBoot2.0发现报错。解决方案如下：
//Srping2.0的转换代码
@Bean
public ServletWebServerFactory serletContainer(){
TomcatServletWebServerFactory tomcat=new TomcatServletWebServerFactory(){
@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());
return tomcat;
}
这样就可以解决 Springboot2 http自动跳转到https，实现了自动转向功能，利用tomcat的redirect功能，进行http到https的redirect.
原因是Springboot2取消了EmbeddedServletContainerFactory TomcatEmbeddedServletContainerFactory
