Java 为什么可以'；我找不到SSL握手的信任库？

我在客户端使用SpringRESTTemplate调用REST端点。本例中的客户端是Spring应用程序，Tomcat是servlet容器

我在连接HTTPS端点时遇到问题。我收到一个错误，表明它找不到信任库的有效路径。我在哪里可以指定这个？这是在容器级别还是在应用程序配置（Spring）级别完成的

堆栈跟踪：

org.springframework.web.client.ResourceAccessException: I/O error:
sun.security.validator.ValidatorException: PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException:
unable to find valid certification path to requested target;
nested exception is javax.net.ssl.SSLHandshakeException:
sun.security.validator.ValidatorException:
PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException:
unable to find valid certification path to requested target
org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:330)
org.springframework.web.client.RestTemplate.execute(RestTemplate.java:292)
org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:227)

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您需要正确配置SSLContext，这是在RESTTemplate外部完成的。这应该让你开始：

    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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更具体地说，调用此方法将实现此目的，因此任何后续的HttpClient调用都不会关心SSL证书的有效性：

public static void trustSelfSignedSSL() {
    try {
        SSLContext ctx = SSLContext.getInstance("TLS");
        X509TrustManager tm = new X509TrustManager() {

            public void checkClientTrusted(X509Certificate[] xcs, String string) throws CertificateException {
            }

            public void checkServerTrusted(X509Certificate[] xcs, String string) throws CertificateException {
            }

            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };
        ctx.init(null, new TrustManager[]{tm}, null);
        SSLContext.setDefault(ctx);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

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您可以在任何地方编写它，因为它对SSLContext类本身进行静态调用。只要您在相同的类加载器上下文中调用它，并且在第一次HttpClient调用之前，您就可以开始了？所以每次启动应用程序时都需要这样做。作为参考，我必须导入以下内容才能使用此。。。导入javax.net.ssl.SSLContext；导入javax.net.ssl.X509TrustManager；导入java.security.cert.x509证书；导入javax.net.ssl.TrustManager；导入java.security.cert.CertificateException；