下面是使用Apache Beam实现通配符递归搜索文件的代码示例：

import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.io.FileIO;
import org.apache.beam.sdk.io.fs.MatchResult;
import org.apache.beam.sdk.io.fs.MoveOptions;
import org.apache.beam.sdk.io.fs.ResourceId;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.ParDo;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class FileSearch {

    public static void main(String[] args) {
        PipelineOptions options = PipelineOptionsFactory.create();
        Pipeline pipeline = Pipeline.create(options);

        String rootDirectory = "/path/to/root/directory";
        String filePattern = "*.txt"; // 使用通配符来匹配文件名

        pipeline
                .apply("Search files", FileIO.match().filepattern(rootDirectory + "/**"))
                .apply("Filter files", ParDo.of(new FilterFilesFn(filePattern)))
                .apply("Print file paths", ParDo.of(new PrintFilePathsFn()));

        pipeline.run().waitUntilFinish();
    }

    static class FilterFilesFn extends DoFn {
        private final String filePattern;

        public FilterFilesFn(String filePattern) {
            this.filePattern = filePattern;
        }

        @ProcessElement
        public void processElement(ProcessContext c) {
            MatchResult.Metadata metadata = c.element();
            String filePath = metadata.resourceId().toString();

            Pattern pattern = Pattern.compile(filePattern);
            Matcher matcher = pattern.matcher(filePath);

            if (matcher.matches()) {
                c.output(metadata);
            }
        }
    }

    static class PrintFilePathsFn extends DoFn {
        @ProcessElement
        public void processElement(ProcessContext c) {
            MatchResult.Metadata metadata = c.element();
            String filePath = metadata.resourceId().toString();
            System.out.println(filePath);
        }
    }
}

上述代码中，我们使用FileIO.match().filepattern()方法来匹配指定目录下的所有文件。然后使用ParDo转换来过滤出符合通配符模式的文件，并使用另一个ParDo转换来打印文件路径。

注意替换代码中的rootDirectory和filePattern为实际的目录和文件通配符。