1.擁有證書，可自己生成測試用javatool生成

keytool -keystore [keyname].jks -genkey -alias tomcat -keyalg RSA

接下來輸入相關信息即可

2.把證書添加到項目中/src/main/resources/目錄下

3.增加配置

server.port= 8443
server.ssl.key-store= classpath:mykeys.jks
server.ssl.key-store-password= yourpassword
server.ssl.key-password= yourpassword

4.配置用戶訪問http自動跳轉到https（http與https均可訪問）

@Configuration
public class HttpsConfiguration {

    @Bean
    public EmbeddedServletContainerFactory servletContainer() {
        TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory() {
            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(httpConnector());
        
 
return tomcat;
    }

    @Bean
    public Connector httpConnector() {
        Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
        connector.setScheme("http");
        connector.setPort(8080);// 表示用8080端口來供http訪問
        connector.setSecure(false);
        connector.setRedirectPort(8443);// 自動重定向到8443端口
        return connector;
    }
}

spring boot接口 支持https