Rest api 如何在不包含 Jersey 证书的情况下工作?

How Rest api's are working without including certificates in Jersey?

我正在使用 Jersey2 调用一些第三方 REST API,它工作正常,API 是 "HTTPS",所以我想知道它们是如何工作的,因为我我的代码中没有包含任何证书?据我所知,HTTPS 需要证书,有人可以指导我吗?下面是我的代码:

    HttpAuthenticationFeature feature = HttpAuthenticationFeature.basic("username", "password");
    Client client = ClientBuilder
            .newBuilder()
            .property(LoggingFeature.LOGGING_FEATURE_VERBOSITY_CLIENT, LoggingFeature.Verbosity.PAYLOAD_ANY)
            .property(LoggingFeature.LOGGING_FEATURE_LOGGER_LEVEL_CLIENT, "INFO")
            .build();

    client.register(feature);

    WebTarget target = client.target(<HTTPS URL>);
    MultivaluedMap<String, String> formData = new MultivaluedHashMap<String, String>();
    formData.add("Name1", "VALUE1");
    formData.add("Name2", "VALUE2");
    Response postResponse =
            target.request(MediaType.TEXT_PLAIN)
                .post(Entity.entity(formData,MediaType.APPLICATION_FORM_URLENCODED_TYPE),
                        Response.class);` 

它使用 java cacerts jdk,签入 $JDK_HOME/jre/lib/security ,如果没有,java 客户端将使用此证书建立安全连接已被自定义证书覆盖。