Java中使用遍历文件夹的2种方法

早知

A.不使用递归： import java.io.File; import java.util.LinkedList; public class FileSystem { public static void main(String[] args) { long a = System.currentTimeMillis(); LinkedList list = new LinkedList(); File dir = new File("c:\\java\\"); File file[] = dir.listFiles(); for (int i = 0; i < file.length; i ) { if (file[i].isDirectory()) list.add(file[i]); else System.out.println(file[i].getAbsolutePath()); } File tmp; while (!list.isEmpty()) { tmp = list.removeFirst(); if (tmp.isDirectory()) { file = tmp.listFiles(); if (file == null) continue; for (int i = 0; i < file.length; i ) { if (file[i].isDirectory()) list.add(file[i]); else System.out.println(file[i].getAbsolutePath()); } } else { System.out.println(tmp.getAbsolutePath()); } } System.out.println(System.currentTimeMillis() - a); } } B.使用递归： import java.io.File; import java.util.ArrayList; public class FileSystem1 { private static ArrayList filelist = new ArrayList(); public static void main(String[] args) { long a = System.currentTimeMillis(); refreshFileList("c:\\java"); System.out.println(System.currentTimeMillis() - a); } public static void refreshFileList(String strPath) { File dir = new File(strPath); File[] files = dir.listFiles(); if (files == null) return; for (int i = 0; i < files.length; i ) { if (files[i].isDirectory()) { refreshFileList(files[i].getAbsolutePath()); } else { String strFileName = files[i].getAbsolutePath().toLowerCase(); System.out.println("---" strFileName); filelist.add(files[i].getAbsolutePath()); } } } } 结论：经过测试，使用递归的方法B性能相对好一些。