文件递归实例

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());                    
            } 
        } 
    }
}