Spring Boot 支持 HTTPS 如此简单，So easy!

这里讲的是 Spring Boot 内嵌式 Server 打 jar 包运行的方式，打 WAR 包部署的就不存在要 Spring Boot 支持 HTTPS 了，需要去外部对应的 Server 配置。你所需具备的基础什么是 Spring Boot?Spring Boot 核心配置文件详解Spring Boot 开启的 2 种方式Spring Boot 自动配置原理、实战Spring Boot 2.x 启动全过程源码分析更多请在Java技术栈微信公众号后台回复关键字：boot。支持 HTTPSSpring Boot 配置 SSL 很简单，只需要通过一系列的 server.ssl.* 参数即可完成配置，如下所示。application.properties 配置文件参考配置：server.port=8443
server.ssl.protocol=TLS
server.ssl.key-store=classpath:javastack.keystore
server.ssl.key-store-password=javastack
server.ssl.key-store-type=JKS
如何在本地测试创建证书请参考这篇文章《一分钟开启Tomcat https支持》，把生成完的证书复制到 Spring Boot 项目中的 resources 目录即可。这边只是提供了一个 SSL 单向验证的演示，更多 SSL 参数配置如下。server.ssl.ciphers= # Supported SSL ciphers.
server.ssl.client-auth= # Whether client authentication is wanted ("want") or needed ("need"). Requires a trust store.
server.ssl.enabled= # Enable SSL support.
server.ssl.enabled-protocols= # Enabled SSL protocols.
server.ssl.key-alias= # Alias that identifies the key in the key store.
server.ssl.key-password= # Password used to access the key in the key store.
server.ssl.key-store= # Path to the key store that holds the SSL certificate (typically a jks file).
server.ssl.key-store-password= # Password used to access the key store.
server.ssl.key-store-provider= # Provider for the key store.
server.ssl.key-store-type= # Type of the key store.
server.ssl.protocol=TLS # SSL protocol to use.
server.ssl.trust-store= # Trust store that holds SSL certificates.
server.ssl.trust-store-password= # Password used to access the trust store.
server.ssl.trust-store-provider= # Provider for the trust store.
server.ssl.trust-store-type= # Type of the trust store.

参数对应的类：org.springframework.boot.web.server.Ssl上面的例子配置后就能开启 HTTPS 了，默认的 HTTP 协议就不再支持了，Spring Boot 不支持以配置文件配置的方式同时支持 HTTP 和 HTTPS。如何同时支持?如果你需要同时支持 HTTP 和 HTTPS 这两个协议，就需要把另外一个协议用程序化的方式来配置。因为通过程序的方式配置 HTTP 协议更加简单一点，所以，Spring Boot 推荐的做法是把 HTTPS 配置在配置文件，HTTP 通过程序来配置。来，下面示例就是通过程序的方式来额外支持 HTTP 协议。@SpringBootApplication
public class JavastackApplication {

    @Bean
    public ServletWebServerFactory servletContainer() {
        TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory();
        tomcat.addAdditionalTomcatConnectors(createStandardConnector());
        return tomcat;
    }

    private Connector createStandardConnector() {
        Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
        connector.setPort(8080);
        return connector;
    }

    public static void main(String[] args) {
        SpringApplication.run(JavastackApplication.class, args);
    }

}