java类file实现文件递归查找指定文件名后缀，过滤器

Posted 2022-11-23 weixin_ancenhw

public class FilePath 
    public static void main(String[] args) 
        File file = new File("D:\\\\ancen\\\\deliver");
        fileDir(file);
    

    //递归打印多级目录
    public static void fileDir(File filePath) 
        File[] files = filePath.listFiles();
        for (File file : files) 
            if (file.isDirectory())
                fileDir(file);
            else
                //查找指定后缀文件
                String path = file.getPath();
                //转换为小写
                String s = path.toLowerCase();
                boolean b = s.endsWith(".jpg");
                if(b)
                    System.out.println(file);
                

            

        
    

文件夹过滤器的使用

public class FilePath 
    public static void main(String[] args) 
        File file = new File("D:\\\\ancen\\\\deliver");
        fileDir(file);
    

    //递归打印多级目录
   public class FilePath 
    public static void main(String[] args) 
        File file = new File("D:\\\\ancen\\\\deliver");
        fileDir(file);
    

    //递归打印多级目录
    public static void fileDir(File filePath) 
        //调用过滤器。如果返回true，则将查询到的对象返回给集合
        //File[] files = filePath.listFiles(pathname->pathname.isDirectory()||pathname.getPath().toLowerCase().endsWith(".jpg"));
        File[] files = filePath.listFiles(new FileFilter() 
            @Override
            public boolean accept(File pathname) 
              
                return pathname.isDirectory()||pathname.getPath().toLowerCase().endsWith(".jpg");
            
        );
        for (File file : files) 
            if (file.isDirectory())
                fileDir(file);
            else
                System.out.println(file);