Java code to list all files in a directory and sub-directories

//Java code to list all files in a directory and sub-directories

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.attribute.BasicFileAttributes;

import com.csvreader.CsvWriter;

public class FilesFromDirectories {
 
    static long fileSize;
     static String size;
       
     static CsvWriter csvOutput;
     
    public static <lang> void main(String a[]) throws IOException{
     
//Folder path
    File file = new File(" D://learn");
        

//Out put csv file
    File file2 = new File("D:\\output.csv");

    if ( !file2.exists() ){
        file2.createNewFile();
    }
    csvOutput= new CsvWriter(new FileWriter(file2, true), ',');
        
        csvOutput.write("File Name");
        csvOutput.write("Creation Time");
        csvOutput.write("Size");
        csvOutput.write("Full Path");
        csvOutput.endRecord();
        listfiles(file.toString());
        
    }


public static void listfiles(String directoryName) throws IOException {
        File directory = new File(directoryName);
         BasicFileAttributes attributes = null;
        File[] fList = directory.listfilesiles();
        try
        {
        for (File f : fList) {
            if (f.isFile()) {
            attributes = Files.readAttributes(f.toPath(), BasicFileAttributes.class);
                //System.out.println("File Name ="+f.getName());
                fileSize= f.length(); 
                size=String.valueOf(fileSize);
                //System.out.println("File Size :: " + fileSize);
               // System.out.println("File Size :: " + f);
                System.out.println("File Name  :: "+ f.getName()+"Size :: "+ size + "Full Path "+f.toString());
                System.out.println("Creation Time ::"+attributes.creationTime());
        csvOutput.write(f.getName());
csvOutput.write(attributes.creationTime().toString());
        csvOutput.write(size);
    csvOutput.write(f.toString());
   
      csvOutput.endRecord();
      
              } else if (f.isDirectory()) {
                System.out.println(f);
            listfiles(f.getAbsolutePath());
            }
          
     csvOutput.flush();
        }
        }
        catch(IOException exception)
        {
        System.out.println("Exception handled when trying to get file " +
                     "attributes: " + exception.getMessage());
        }
    }
    
}

Java code to get last modified date of files from directory

//Java code to get last modified date of files from directory

import java.io.File;
import java.io.FilenameFilter;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.activation.MimetypesFileTypeMap;

public class FilterFilesFromFolder {
    
   
    public static <lang> void main(String a[]){
        File file = new File("E:/sample/");
     
        //filtering txt from folder
        FilenameFilter textFilter = new FilenameFilter()
        {
            public boolean accept(File dir, String name) {
                String lowercaseName = name.toLowerCase();
                if (lowercaseName.endsWith(".txt")) {
                    return true;
                } else {
                    return false;
                }
            }
        };
       
        File[] files = file.listFiles(textFilter);
       
        long min = 0;
        String mimeType;
        SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
        Date d = new Date();
        System.out.println("System Date :"+ sdf.format(d));
        for(File f: files){
            System.out.println("File Name ="+f.getName());
            System.out.println("Date Last Madified ="+ sdf.format(f.lastModified()));
            mimeType = new MimetypesFileTypeMap().getContentType(f);
            System.out.println("MIME Type ="+ new MimetypesFileTypeMap().getContentType(f));
           
            //getting last one hour modified files
            try
            {
                 long cd = d.getTime();
                 long lmd = f.lastModified();
                 long diff= cd-lmd;
                 System.out.println("Diff ="+diff);
                min = diff/(60 * 1000);
                 System.out.println("Diff in Min = "+min);
            }
            catch(Exception e)
            {
                System.out.println("Error in Date Diffrence = " + e);
            }
            if (min <= 60)
            {
            System.out.println("send mail");   
            }
        }
    }
}