java遍历文件夹

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:/Users/shibin/Desktop/tupian");
        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());                    
            } 
        } 
    }
}

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:/Users/shibin/Desktop/tupian");
        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);
    }
}