1.RestTemplate預設是不支援HTTPS請求的，那麼如果想使用RestTemplate傳送一個HTTPS的請求 ，就需要對證書進行處理，這裡記錄一下一個可行的方法。

2.導包

import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;

3.程式碼實現

        try {
            TrustStrategy acceptingTrustStrategy = (chain, authType) -> true;
            SSLContext sslContext = SSLContexts.custom().loadTrustMaterial(null, acceptingTrustStrategy).build();
            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE);

            HttpClientBuilder clientBuilder = HttpClients.custom();

            CloseableHttpClient httpClient = clientBuilder.setSSLSocketFactory(sslsf).build();

            HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
            requestFactory.setHttpClient(httpClient);

            this.restTemplate = new RestTemplate(requestFactory);
        } catch (Exception e) {
            e.printStackTrace();
        }