Springboot打包之后读取classpath下的文件

在springboot项目resource下增加了一个配置文件，在本地测试通过以下列子都可以正常读取

ResourceUtils.getFile("classpath:/ca/enterprise.xx");

 在部署到测试环境的打成jar部署的docker容器里，报了一个错读取不到jar包中的文件。各种读取方法的尝试，最终使用以下方式可以正常读取

	/**
	 * 在jar包中读取对象
	 * @param enterpriseCerFilePath
	 * @return
	 * @throws IOException
	 */
	public String getSignCertByJarFile(String enterpriseCerFilePath) throws IOException
	{
		FileInputStream fileInputStream = null;
		InputStreamReader inputStreamReader = null;
		BufferedReader bufferedReader = null;
		try{
			InputStream stream = getClass().getClassLoader().getResourceAsStream(enterpriseCerFilePath);
			inputStreamReader = new InputStreamReader(stream); // 建立一个输入流对象reader
			bufferedReader = new BufferedReader(inputStreamReader); // 建立一个对象，它把文件内容转成计算机能读懂的语言
			StringBuffer stringBuffer = new StringBuffer();
			String line= bufferedReader.readLine().trim();
			while (line != null) {
				stringBuffer.append(line);
				line = bufferedReader.readLine(); // 一次读入一行数据
			}
			return stringBuffer.toString();
		}catch(IOException ioe){
			ioe.printStackTrace();
			throw ioe;
		}finally{
			if(null != bufferedReader) bufferedReader.close();
			if(null != inputStreamReader) inputStreamReader.close();
			if(null != fileInputStream) fileInputStream.close();
		}
	}


	public String getSignCertByJarFile2(String enterpriseCerFilePath) throws IOException
	{
		FileInputStream fileInputStream = null;
		InputStreamReader inputStreamReader = null;
		BufferedReader bufferedReader = null;
		try{

			ClassPathResource ClassPathResource = new ClassPathResource(enterpriseCerFilePath);
			bufferedReader = new BufferedReader(new InputStreamReader(ClassPathResource.getInputStream()));

			StringBuffer stringBuffer = new StringBuffer();
			String line= bufferedReader.readLine().trim();
			while (line != null) {
				stringBuffer.append(line);
				line = bufferedReader.readLine(); // 一次读入一行数据
			}
			return stringBuffer.toString();
		}catch(IOException ioe){
			ioe.printStackTrace();
			throw ioe;
		}finally{
			if(null != bufferedReader) bufferedReader.close();
			if(null != inputStreamReader) inputStreamReader.close();
			if(null != fileInputStream) fileInputStream.close();
		}
	}

先记录下解决方案，后续在写具体原因，jar包中的文件读取和在应用中的文件读取不太一样