Read a file from resources folder in java

Table of Contents

Project structure:

Java Program:

In this post, we will see how to read a file from resources folder in java. If you create a maven project(simple java or dynamic web project) , you will see folder src/java/resources. You can read from resources folder using these simple code.

// Getting ClassLoader obj

ClassLoader classLoader = this.getClass().getClassLoader();

// Getting resource(File) from class loader

File configFile=new File(classLoader.getResource(fileName).getFile());

Project structure:

Java Program:

package org.arpit.java2blog;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
/*
 * @author Arpit Mandliya
 */
public class ReadPropertiesFileJavaMain {

public static void main(String args[]) throws IOException
 {
  ReadPropertiesFileJavaMain rp=new ReadPropertiesFileJavaMain();
  System.out.println("Reading file from resources folder");
  System.out.println("-----------------------------");

rp.readFile("config.txt");

System.out.println("-----------------------------");
 }

public  void readFile(String fileName) throws IOException
 {
  FileInputStream inputStream=null;

try {
   // Getting ClassLoader obj
   ClassLoader classLoader = this.getClass().getClassLoader();
   // Getting resource(File) from class loader
   File configFile=new File(classLoader.getResource(fileName).getFile());

inputStream = new FileInputStream(configFile);
   BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
   String line;
   while ((line = reader.readLine()) != null) {
   System.out.println(line);
   }

reader.close();

} catch (FileNotFoundException e) {

e.printStackTrace();
  }catch (IOException e) {

e.printStackTrace();
  }
  finally {
   inputStream.close();
  }

}

package org.arpit.java2blog;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStreamReader;

* @author Arpit Mandliya

public class ReadPropertiesFileJavaMain {

public static void main(String args[]) throws IOException

{

ReadPropertiesFileJavaMain rp=new ReadPropertiesFileJavaMain();

System.out.println("Reading file from resources folder");

System.out.println("-----------------------------");

rp.readFile("config.txt");

System.out.println("-----------------------------");

}

public void readFile(String fileName) throws IOException

{

FileInputStream inputStream=null;

try {

// Getting ClassLoader obj

ClassLoader classLoader = this.getClass().getClassLoader();

// Getting resource(File) from class loader

File configFile=new File(classLoader.getResource(fileName).getFile());

inputStream = new FileInputStream(configFile);

BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

String line;

while ((line = reader.readLine()) != null) {

System.out.println(line);

}

reader.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

}catch (IOException e) {

e.printStackTrace();

}

finally {

inputStream.close();

}

When you run above program, you will get following output.

Reading file from resources folder

-----------------------------

host = localhost

username = java2blog

password = java123

-----------------------------

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