java 周遊檔案夾裡的檔案

Java周遊檔案夾的2種方法： A.不使用遞歸： 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); } }

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());                    
            } 
        } 
    }
}
 結論：經過測試，使用遞歸的方法B性能相對好一些。      

檔案夾操作