问如果我从同一应用程序生成多个消息，KafkaTemplate是否会打开到代理的多个连接？

EN

/**
 * Set to true to create a producer per thread instead of singleton that is shared by
 * all clients. Clients <b>must</b> call {@link #closeThreadBoundProducer()} to
 * physically close the producer when it is no longer needed. These producers will not
 * be closed by {@link #destroy()} or {@link #reset()}.
 * @param producerPerThread true for a producer per thread.
 * @since 2.3
 * @see #closeThreadBoundProducer()
 */
public void setProducerPerThread(boolean producerPerThread) {
    this.producerPerThread = producerPerThread;
    this.threadBoundProducers = new ThreadLocal<>();
}