Java扫描文件夹下所有文件名

package q.test.filescanner; import java.io.File; import java.util.ArrayList; import java.util.LinkedList; import q.test.filescanner.exception.ScanFilesException; /**  * @author  */ public class FolderFileScanner {   private static ArrayList<Object> scanFiles = new ArrayList<Object>();   /**linkedList实现**/   private static LinkedList<File> queueFiles = new LinkedList<File>();   /**    * TODO:递归扫描指定文件夹下面的指定文件    * @return ArrayList<Object>    * @author   * @time 2017年11月3日    */   public static ArrayList<Object> **scanFilesWithRecursion**(String folderPath) throws ScanFilesException{     ArrayList<String> dirctorys = new ArrayList<String>();     File directory = new File(folderPath);     if(!directory.isDirectory()){       throw new ScanFilesException('"' + folderPath + '"' + " input path is not a Directory , please input the right path of the Directory. ^_^...^_^");     }     if(directory.isDirectory()){       File [] filelist = directory.listFiles();       for(int i = 0; i < filelist.length; i ++){         /**如果当前是文件夹，进入递归扫描文件夹**/         if(filelist[i].isDirectory()){         //绝对路径名字符串          dirctorys.add(filelist[i].getAbsolutePath());           /**递归扫描下面的文件夹**/           **scanFilesWithRecursion**(filelist[i].getAbsolutePath());         }         /**非文件夹**/         else{           scanFiles.add(filelist[i].getAbsolutePath());         }       }     }     return scanFiles;   }   /**    *    * TODO:非递归方式扫描指定文件夹下面的所有文件    * @return ArrayList<Object>    * @param folderPath 需要进行文件扫描的文件夹路径    * @author    * @time 2017年11月3日    */   public static ArrayList<Object> scanFilesWithNoRecursion(String folderPath) throws ScanFilesException{     File directory = new File(folderPath);     if(!directory.isDirectory()){       throw new ScanFilesException('"' + folderPath + '"' + " input path is not a Directory , please input the right path of the Directory. ^_^...^_^");     }     else{       //首先将第一层目录扫描一遍       File [] files = directory.listFiles();       //遍历扫出的文件数组，如果是文件夹，将其放入到linkedList中稍后处理       for(int i = 0; i < files.length; i ++){         if(files[i].isDirectory()){           queueFiles.add(files[i]);         }else{           //暂时将文件名放入scanFiles中           scanFiles.add(files[i].getAbsolutePath());         }       }       //如果linkedList非空遍历linkedList       while(!queueFiles.isEmpty()){         //移出linkedList中的第一个         File headDirectory = queueFiles.removeFirst();         File [] currentFiles = headDirectory.listFiles();         for(int j = 0; j < currentFiles.length; j ++){           if(currentFiles[j].isDirectory()){             //如果仍然是文件夹，将其放入linkedList中             queueFiles.add(currentFiles[j]);           }else{             scanFiles.add(currentFiles[j].getAbsolutePath());           }         }       }     }     return scanFiles;   } }