Spark : Kafka消费者获取base64编码字符串形式的数据，即使生产者没有明确编码

import org.apache.spark.streaming.kafka._
import org.apache.spark.streaming.{StreamingContext, Seconds}

val ssc = new StreamingContext(sparkConf, Seconds(5))

val kafkaParams = Map("bootstrap.servers" -> "kafka服务器地址",
                      "key.deserializer" -> "org.apache.kafka.common.serialization.StringDeserializer",
                      "value.deserializer" -> "org.apache.kafka.common.serialization.StringDeserializer",
                      "group.id" -> "消费者组ID",
                      "auto.offset.reset" -> "latest",
                      "enable.auto.commit" -> (false: java.lang.Boolean))

val topics = Array("要订阅的主题")
val kafkaStream = KafkaUtils.createDirectStream[String, String](
  ssc,
  PreferConsistent,
  Subscribe[String, String](topics, kafkaParams)
)

kafkaStream.foreachRDD { rdd =>
  rdd.foreach { record =>
    val base64Data = record.value()
    // 对base64Data进行解码和处理
    // ...
  }
}