1.首先去阿里雲購買個證書，也有免費的，但是免費的只能使用一年，證書需要繫結域名

2.將證書放進專案

3.配置YML

server:
  ssl:
    key-store: 55555.pfx
    key-store-password: 55555
    keyStoreType: PKCS12
    connectionTimeout: 20000
  port: 8888

重點來了，配置請求轉發

@Configuration
public class WebMvcconfig implements WebMvcConfigurer {

    @Bean
    public TomcatServletWebServerFactory servletContainer() {
 
        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;
    }

    @Bean
    public Connector httpConnector() {
        Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
        connector.setScheme("http");
        // Connector監聽的http的埠號
        connector.setPort(8080);
        connector.setSecure(false);
        // 監聽到http的埠號後轉向到的https的埠號
        connector.setRedirectPort(8888);
        return connector;
    }
}

如果請求報錯:java.lang.UnsatisfiedLinkError: org.apache.tomcat.jni.SSL.renegotiatePending(J)I問題

在pom.xml中加入

  <properties>
        <tomcat.version>9.0.12</tomcat.version>
    </properties>

        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-juli</artifactId>
            <version>${tomcat.version}</version>
        </dependency>

然後執行，請求成功！