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();
}
}
}
When you run above program, you will get following output.
Reading file from resources folder ----------------------------- host = localhost username = java2blog password = java123 -----------------------------
