您需要正确配置在RESTTemplate外部完成的SSLContext。这应该使您开始：
String keystoreType = "JKS";
InputStream keystoreLocation = null;
char [] keystorePassword = null;
char [] keyPassword = null;
KeyStore keystore = KeyStore.getInstance(keystoreType);
keystore.load(keystoreLocation, keystorePassword);
KeyManagerFactory kmfactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
kmfactory.init(keystore, keyPassword);
InputStream truststoreLocation = null;
char [] truststorePassword = null;
String truststoreType = "JKS";
KeyStore truststore = KeyStore.getInstance(truststoreType);
truststore.load(truststoreLocation, truststorePassword);
TrustManagerFactory tmfactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
KeyManager [] keymanagers = kmfactory.getKeyManagers();
TrustManager [] trustmanagers = tmfactory.getTrustManagers();
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(keymanagers, trustmanagers, new SecureRandom());
SSLContext.setDefault(sslContext);
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