nacos升级spring cloud 2020.0无法使用bootstrap.yml
之前用spring cloud整合nacos，需要一个bootstrap.yml作为spring启动的初始化配置
bootstrap.yml内容大概如下：
spring: application: # 应用名称 name: xxx profiles: active: dev cloud: nacos: config: file-extension: yml server-addr: localhost:8848 username: nacos password: nacos
把spring cloud升级到2020.0.x以后，nacos就读不到bootstrap.yml了
spring官方其实在change note中说明了，在新版中将spring.cloud.bootstrap.enabled默认设置为false不启用：
https://github.com/spring-cloud/spring-cloud-release/wiki/Spring-Cloud-2020.0-Release-Notes#breaking-changes
源码部分如下：
/* * Copyright 2013-2020 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * https://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package org.springframework.cloud.util;import org.springframework.core.env.Environment;import org.springframework.util.ClassUtils;public abstract class PropertyUtils { /** * Property name for checking if bootstrap is enabled. */ public static final String BOOTSTRAP_ENABLED_PROPERTY = "spring.cloud.bootstrap.enabled"; /** * Property name for spring boot legacy processing. */ public static final String USE_LEGACY_PROCESSING_PROPERTY = "spring.config.use-legacy-processing"; /** * Property name for bootstrap marker class name. */ public static final String MARKER_CLASS = "org.springframework.cloud.bootstrap.marker.Marker"; /** * Boolean if bootstrap marker class exists. */ public static final boolean MARKER_CLASS_EXISTS = ClassUtils.isPresent(MARKER_CLASS, null); private PropertyUtils() { throw new UnsupportedOperationException("unable to instatiate utils class"); } /** * 判断是否启用bootstrap.yml的时候默认设置成了false */ public static boolean bootstrapEnabled(Environment environment) { return environment.getProperty(BOOTSTRAP_ENABLED_PROPERTY, Boolean.class, false) || MARKER_CLASS_EXISTS; } public static boolean useLegacyProcessing(Environment environment) { return environment.getProperty(USE_LEGACY_PROCESSING_PROPERTY, Boolean.class, false); }}
解决方案是在vm启动参数中增加-Dspring.cloud.bootstrap.enabled=true，或者增加spring-cloud-starter-bootstrap依赖，至于spring cloud alibaba nacos后续是否能支持application.yml，目前alibaba官方还没有回复
nacos避坑指南！nacos 配置中心无法加载bootstrap.yml/properties配置文件
在使用nacos时引入以下两个依赖：
<!--服务注册/发现--><dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency> <!--配置中心来做配置管理--><dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId></dependency>
错误异常信息：
com.alibaba.nacos.api.exception.NacosException: java.lang.reflect.InvocationTargetException……Caused by: java.lang.reflect.InvocationTargetException: nullat sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_211]at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_211]at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_211]at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_211]at com.alibaba.nacos.api.config.ConfigFactory.createConfigService(ConfigFactory.java:42) ~[nacos-api-1.1.1.jar:na]… 34 common frames omittedCaused by: com.alibaba.nacos.api.exception.NacosException: endpoint is blank
解决方案：加入以下依赖即可
<!-- 若bootstrap配置不生效，加入以下依赖 --><dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bootstrap</artifactId> <version>3.0.1</version></dependency>
配置文件：
在启动服务后的第一条日志信息：
上面的 【conpon-service.properties】添加到nacos中
补充一下：nacos配置修改后，项目中要动态实时更新，项目中需要动态配置，在congtroller中加入一个注解
@RefreshScope // 动态刷新nacos配置
即可。
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。
让我们从自身的禁锢中放心地飞出去，重新审视自己，
