TraverseDirectory.java Source code

Introduction

Here is the source code for TraverseDirectory.java

Source

/*
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import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Collection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.io.FileUtils;

/**
 *
 * @author GAURAV KUMAR
 */
public class TraverseDirectory {

    /*
    Requirements : -
        
    1) You Will Require a org.apache.commons.io jar file that will 
       be available on the internet
    2) Provide a directory from path from the function
        
    This function is Used to Read the File and find the pattern that matches with the
     Mobile number Using Regex Pattern in Java
        
    Arguments : -  String file ---> This is the file location which is of extension .txt
        
    */
    public static void traveseFile(String file) throws FileNotFoundException, IOException {
        BufferedReader buffer = new BufferedReader(new FileReader(file));
        Pattern p = Pattern.compile("^[7-9]\\d{9}");
        String read;
        while ((read = buffer.readLine()) != null) {
            Matcher r = p.matcher(read);
            if (r.matches()) {
                System.out.println(read);
            }
        }

    }

    /*
        
    This Method With take the Directory Path from that path It will List all the Files 
    Form here
        
    */
    public static void recursieTraverseDirectory(String path) throws FileNotFoundException, IOException {
        File file = new File(path);
        //It will List all the files and subdirectores file if it is Set to True
        Collection<File> files = FileUtils.listFiles(file, null, true);
        for (File file2 : files) {

            String filter = ".txt"; //Extension for Filtering the file
            if (file2.toString().endsWith(filter)) {
                //Function call to Traverse the file with .txt extension
                traveseFile(file2.toString());

            }
        }
    }

    public static void main(String args[]) throws IOException {
        String path = "C:\\Users\\GAURAV KUMAR\\Documents\\NetBeansProjects\\Contest";

        //Here path is the absolute path from root directory 
        recursieTraverseDirectory(path);
    }
}