final static String SOURCESTRING = "/Users/amarao/360/download/test/";
final static String OUTPUTSTRING = "/Users/amarao/360/download/test4/";
 
 public static void main(String[] args) throws IOException {
 // 將SOURCESTRING下的文件復制3次到OUTPUTSTRING目錄下
 LCopyFileUtils.copyFile(SOURCESTRING, OUTPUTSTRING, 3);
 }

/**
 *
 * 參考：
 * Java將一個目錄下的所有數據復制到另一個目錄下：https://www.jb51.net/article/167726.htm
 * Java復制文件的4種方式：https://www.jb51.net/article/70412.htm
 * */
public class LCopyFileUtils {
 
 /**
 * 復制srcPath路徑下的文件到destPath目錄下
 *
 * @param srcPath 源文件路徑
 * @param destPath 輸出路徑
 * @param count 每個文件的復制次數
 * @return 是否復制成功
 */
 public static boolean copyFile(String srcPath, String destPath, int count) throws IOException {
 File fileSrc = new File(srcPath);
 File[] files = fileSrc.listFiles();
 if (files == null) {
  System.out.println("Error:源文件夾下沒有文件");
  return false;
 }
 for (int i = 0; i < files.length; i++) {
  if (files[i].isFile()) {
  File file = null;
  String fileName = files[i].getName();
 
  String filePrefix = fileName.substring(0, fileName.lastIndexOf("."));
  String fileSuffix = fileName.substring(fileName.lastIndexOf("."));
 
  // 每個文件復制Count次
  for (int j = 0; j < count; j++) {
   file = new File(destPath + File.separator + filePrefix + "_" + i + "_" + j + fileSuffix);// 創建文件
   copyFileUsingFileChannels(files[i], file);
  }
  }
 }
 return true;
 }
 
 /**
 * 復制文件srcFile到destFile
 *
 * @param srcFile 源文件
 * @param destFile 目的文件
 */
 public static void copyFileUsingFileChannels(File srcFile, File destFile) throws IOException {
 FileChannel inputChannel = null;
 FileChannel outputChannel = null;
 try {
  inputChannel = new FileInputStream(srcFile).getChannel();
  outputChannel = new FileOutputStream(destFile).getChannel();
  outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
  System.out.println("復制文件成功：" + srcFile.getName() + " -> " + destFile.getName());
 } catch (Exception e) {
  System.out.println("Error:復制文件失敗：" + srcFile.getName() + " -> " + destFile.getName());
 } finally {
  if (inputChannel != null) {
  inputChannel.close();
  }
  if (outputChannel != null) {
  outputChannel.close();
  }
 }
 }
 
}