1.问题描述

今天分享一个发版遇到问题，读取resource下文件时报错，但是本地环境启动时并不会报错，最终定位到代码：

File jsonFile = ResourceUtils.getFile("classpath:xxx.json");
String settingJson = FileUtils.readFileToString(jsonFile, "UTF-8");

报错信息：
java.io.FileNotFoundException: class path resource [xxx] cannot be resolved to absolute file path because it does not reside in the file system: jar:file/xxx/BOOT-INF/classes/xxxxx

2.解决方案

import org.apache.commons.io.IOUtils;
import org.springframework.core.io.ClassPathResource;

ClassPathResource classPathResource = new ClassPathResource("xxx.json");
String settingJson = IOUtils.toString(classPathResource.getInputStream(),"utf8");