这可能是由于AWS S3控制台创建的文件夹不是真正的文件夹，而是“伪文件夹”。要解决此问题，可以在Camel路由之前使用AWS SDK将“伪文件夹”转换为真正的文件夹。

以下是Java代码示例，演示如何使用AWS SDK将S3中的“伪文件夹”转换为真正的文件夹：

import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.CopyObjectRequest;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.S3ObjectSummary;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.aws.s3.S3Constants;
import org.apache.camel.impl.DefaultCamelContext;

public class S3RouteBuilder extends RouteBuilder {

  private final AmazonS3 s3Client = AmazonS3ClientBuilder.defaultClient();
  
  public static void main(String[] args) throws Exception {
    DefaultCamelContext context = new DefaultCamelContext();
    context.addRoutes(new S3RouteBuilder());
    context.start();
    Thread.sleep(5000);
    context.stop();
  }

  @Override
  public void configure() {
    from("aws-s3://my-bucket?amazonS3Client=#s3Client&autoCreateBucket=true&prefix=my-folder/")
        .process(new Processor() {
          @Override
          public void process(Exchange exchange) throws Exception {
            S3ObjectSummary obj = exchange.getIn().getBody(S3ObjectSummary.class);

            // Check if current object is a 'pseudo-folder'
            if (obj.getKey().endsWith("/")) {
              String folderName = obj.getKey().replaceFirst("^my-folder/", "");

              // Copy the object to a dummy key with content type as 'application/x-directory'
              CopyObjectRequest copyObjRequest = new CopyObjectRequest(
                  obj.getBucketName(),
                  obj.getKey(),
                  obj.getBucketName(),