[JAVA] Read the file under the classpath as a character string with spring

Code that reads src / main / resources / application.yml as a string for the time being.

import java.io.IOException;
import java.nio.charset.StandardCharsets;

import org.springframework.core.io.ClassPathResource;
import org.springframework.util.FileCopyUtils;

import jp.co.rakuten.firstparty.base.exception.FirstPartyBizException;

public class Hoge {

  public static void main(String[] args) {
    String path = "application.yml";
    try {
      String str = new String(FileCopyUtils.copyToByteArray(new ClassPathResource(path).getInputStream()),
    } catch (IOException e) {
      throw new FirstPartyBizException(e);


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