如何使用Java 8复制具有不同扩展名的多个文件？

File sourceDirectory = new File(sourcePath);
File[] files = sourceDirectory.listFiles();

for (File file : files) {
    String extension = FilenameUtils.getExtension(file.getName());
    if (extension.equals("txt") || extension.equals("doc")) {
        // 复制文件
    }
}

Path source = file.toPath();
Path target = Paths.get(targetPath, file.getName());
Files.copy(source, target, StandardCopyOption.REPLACE_EXISTING);

import org.apache.commons.io.FilenameUtils;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;

public class FileCopyExample {
    public static void main(String[] args) {
        String sourcePath = "source_directory_path";
        String targetPath = "target_directory_path";

        File sourceDirectory = new File(sourcePath);
        File[] files = sourceDirectory.listFiles();

        for (File file : files) {
            String extension = FilenameUtils.getExtension(file.getName());
            if (extension.equals("txt") || extension.equals("doc")) {
                try {
                    Path source = file.toPath();
                    Path target = Paths.get(targetPath, file.getName());
                    Files.copy(source, target, StandardCopyOption.REPLACE_EXISTING);
                    System.out.println("File copied: " + file.getName());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}