android遍历本地文件 java遍历本地文件夹

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());
}
}
}
}