Read local json file and converts it to a String.

FileReaderUtil.java

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Scanner;

/* How to use it:

  1 - Create a ClassLoader instance
        ClassLoader classLoader = this.getClass().getClassLoader();
  2 - Pass the ClassLoader object and the finleName.json as input.
        String stringJson = FileReaderUtil.readFile(classLoader, "fileName.json");
*/

public class FileReaderUtil {

    public static String readFile(ClassLoader classLoader, String fileName) {
        String result = "";

        try {
            URL resource = classLoader.getResource(fileName);
            File f = new File(resource.toURI());
            Scanner in = new Scanner(new FileReader(f));
            StringBuilder b = new StringBuilder();
            while (in.hasNextLine()) {
                b.append(in.nextLine());
            }
            result = b.toString();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (URISyntaxException e) {
            e.printStackTrace();
        }

        return result;
    }
}