密钥库证书链长度错误 - 如何以编程方式加载完整的证书链到Java密钥库，以用于使用SSL身份验证连接到Kafka？

要以编程方式加载完整的证书链到Java密钥库，以用于使用SSL身份验证连接到Kafka，可以使用以下代码示例：

import java.io.FileInputStream;
import java.io.InputStream;
import java.security.KeyStore;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManagerFactory;

public class KafkaSSLExample {

  public static void main(String[] args) throws Exception {
    String truststorePath = "path/to/truststore.jks";
    String truststorePassword = "truststorePassword";
    String keystorePath = "path/to/keystore.p12";
    String keystorePassword = "keystorePassword";

    // Load truststore
    KeyStore truststore = KeyStore.getInstance("JKS");
    try (InputStream truststoreInputStream = new FileInputStream(truststorePath)) {
      truststore.load(truststoreInputStream, truststorePassword.toCharArray());
    }

    // Load keystore
    KeyStore keystore = KeyStore.getInstance("PKCS12");
    try (InputStream keystoreInputStream = new FileInputStream(keystorePath)) {
      keystore.load(keystoreInputStream, keystorePassword.toCharArray());
    }

    // Create trust manager factory
    TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
    trustManagerFactory.init(truststore);

    // Create key manager factory
    KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
    keyManagerFactory.init(keystore, keystorePassword.toCharArray());

    // Create SSL context
    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init(keyManagerFactory.getKeyManagers(), trustManagerFactory.getTrustManagers(), null);

    // Use the SSL context to connect to Kafka
    // KafkaConsumer<String, String> consumer = new KafkaConsumer<>(properties, new StringDeserializer(), new StringDeserializer());
    // consumer.subscribe(Arrays.asList("topic1"));
    // ...
  }
}

注意，代码中的truststorePath和keystorePath应替换为您的实际路径，truststorePassword和keystorePassword应替换为您的实际密码。

此示例中的代码将加载密钥库和信任库，并创建SSL上下文以进行SSL连接。您可以根据您的实际需求修改代码以适应您的环境和证书配置。在创建SSL上下文后，您可以使用SSL上下文连接到Kafka。