JAVA 遍历文件夹下的所有文件(递归调用和非递归调用)

Posted 2022-03-19 azhqiang

JAVA 遍历文件夹下的所有文件(递归调用和非递归调用)

1.不使用递归的方法调用.

public void traverseFolder1(String path) 
        int fileNum = 0, folderNum = 0;
        File file = new File(path);
        if (file.exists()) 
            LinkedList<File> list = new LinkedList<File>();
            File[] files = file.listFiles();
            for (File file2 : files) 
                if (file2.isDirectory()) 
                    System.out.println("文件夹:" + file2.getAbsolutePath());
                    list.add(file2);
                    foldeNum++;
                 else 
                    System.out.println("文件:" + file2.getAbsolutePath());
                    fileNum++;
                
            
            File temp_file;
            while (!list.isEmpty()) 
                temp_file = list.removeFirst();
                files = temp_file.listFiles();
                for (File file2 : files) 
                    if (file2.isDirectory()) 
                        System.out.println("文件夹:" + file2.getAbsolutePath());
                        list.add(file2);
                        folderNum++;
                     else 
                        System.out.println("文件:" + file2.getAbsolutePath());
                        fileNum++;
                    
                
            
         else 
            System.out.println("文件不存在!");
        
        System.out.println("文件夹共有:" + folderNum + ",文件共有:" + fileNum);

    

2.使用递归的方法调用.

public void traverseFolder2(String path) 

        File file = new File(path);
        if (file.exists()) 
            File[] files = file.listFiles();
            if (null == files || files.length == 0) 
                System.out.println("文件夹是空的!");
                return;
             else 
                for (File file2 : files) 
                    if (file2.isDirectory()) 
                        System.out.println("文件夹:" + file2.getAbsolutePath());
                        traverseFolder2(file2.getAbsolutePath());
                     else 
                        System.out.println("文件:" + file2.getAbsolutePath());
                    
                
            
         else 
            System.out.println("文件不存在!");
        
    

3,

public static List<File> getFileList(String strPath) 
        File dir = new File(strPath);
        File[] files = dir.listFiles(); // 该文件目录下文件全部放入数组
        if (files != null) 
            for (int i = 0; i < files.length; i++) 
                String fileName = files[i].getName();
                if (files[i].isDirectory())  // 判断是文件还是文件夹
                    getFileList(files[i].getAbsolutePath()); // 获取文件绝对路径
                 else if (fileName.endsWith("avi"))  // 判断文件名是否以.avi结尾
                    String strFileName = files[i].getAbsolutePath();
                    System.out.println("---" + strFileName);
                    filelist.add(files[i]);
                 else 
                    continue;
                
            

        
        return filelist;
    

原文地址：https://www.cnblogs.com/azhqiang/p/4596793.html