http://www.mkyong.com/java/java-read-a-file-from-resources-folder/를 참고함.

import java.io.File;
import java.io.IOException;
import java.util.Scanner;

/**
 * 리소스 파일로 부터 내용을 읽어 문자열로 반환하는 유틸리티 클래스.
 *
 * Created by lks21c on 16. 1. 29.
 */
public class ResourceFileReadUtil {

    public String getFileContent(String fileName) {
        ClassLoader classLoader = getClass().getClassLoader();
        File file = new File(classLoader.getResource(fileName).getFile());
        StringBuilder sb = new StringBuilder("");
        try (Scanner scanner = new Scanner(file)) {
            while (scanner.hasNextLine()) {
                String line = scanner.nextLine();
                sb.append(line).append("\n");
            }
            scanner.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return sb.toString();
    }
}