java 遍历文件夹里的文件

Java遍历文件夹的2种方法： 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。 
 
文件夹操作
http://www.cnblogs.com/springcsc/archive/2009/12/03/1616367.html