java springboot框架，编译为jar包后也能读取resources/templates目录下的文件

InputStream simulatorServiceInputStream = this.getClass().getResourceAsStream("/templates/simulatorServiceTemplate.txt");
        StringBuilder simulatorServiceContentBuilder = new StringBuilder();
        byte[] fileContentBytes = new byte[1024];
        while(true){
            assert simulatorServiceInputStream != null;
            if ((simulatorServiceInputStream.read(fileContentBytes)) == -1) break;
            int fileContentLength = 0;
//这里是为了删除结束符，否则会在文件中写入一堆null
            for (byte b : fileContentBytes) {
                if (b != 0) {
                    fileContentLength++;
                } else {
                    // 遇到结束符0，跳出循环
                    break;
                }
            }
            String strRead = new String(fileContentBytes,0,fileContentLength,StandardCharsets.UTF_8);
            simulatorServiceContentBuilder.append(strRead);
            fileContentBytes = new byte[1024];
        }
String simulatorServiceContent = simulatorServiceContentBuilder.toString();