业务需要整合dubbo，考虑成本，使用现有的redis作为注册中心，项目使用的Spring-boot-starter版本2.7.6
步骤：
参考官方中文文档http://dubbo.apache.org/zh-cn/docs/user/quick-start.html
1.在项目中导入依赖：（1.服务提供者provider、服务消费者consumer都需要导入以下jar）
org.apache.dubbo
dubbo-spring-boot-starter
2.7.6
redis.clients
jedis
2.9.0
2.创建一个module用于编写dubbo接口，即provider、consumer都需要依赖的，个人建议：不要做任何依赖，越干净越好
3.毫无疑问provider、consumer都需要依赖该module
4.分别对provider、consumer进行配置
provider、consumer配置基本一样，唯一不一样的地方是dubbo.application.name=xxxx
dubbo:
scan:
base-packages: com.xxxx.ccp.service
registry:
protocol: redis
parameters:
# 指定redis数据库，别问我为什么是这个参数，看源码发现的
db.index: 1
# 上面配置了redis故直接取值即可，也可以直接写成 address: root:123456@127.0.0.1:6379
address: root:${spring.redis.password}@${spring.redis.host}:${spring.redis.port}
cluster: failover
protocol:
# 名字任意
id: xxx-protocol
port: 20880
name: dubbo
application:
# 名字任意
name: xxxx-application
5.剩下就是provider实现上面module中的接口，记得在类上加上@service注解，注意：不是Spring的service注解，是org.apache.dubbo.config.annotation.Service注解
6.服务consumer消费处，直接@Reference注入即可 @注解路径是org.apache.dubbo.config.annotation.Reference，示例
@Reference
private DubboProviderService dubboProviderService;
启动顺序：
redis服务-> provider -> consumer
遇到的坑
Invalid name="com.alibaba.dubbo.config.ProtocolConfig#0"
原因是
dubbo采用Spring 工具类BeanDefinitionReaderUtils.generateBeanName(builder.getRawBeanDefinition(),register)得到的bean带有#,而dubbo进行验证pattern("[-._0-9a-zA-Z]+"不包含#故报错
解决办法：
设置dubbo.protocol.id=xxx # 名称任意唯一即可
初始配置为
考虑到redis不需要用户名这样配置
dubbo:
registry:
protocol: redis
parameters:
db.index: 1
address: 127.0.0.1:6379
password: 123456
启动报错提示连接没有授权，即使配置了password也不行，修改为如下（加上username随便写一值反正没用）
dubbo:
registry:
protocol: redis
parameters:
db.index: 1
address: 127.0.0.1:6379
username: root
password: 123456
启动仍然报错
修改为如下完美解决：
dubbo:
registry:
protocol: redis
parameters:
db.index: 1
address: root:123456@127.0.0.1:6379
cluster: failover
为解决问题，顺便看了url解析逻辑，先根据“”split，然后在判断有没有"😕/“,再判断有没有”@"，每次分隔进行参数封装
2020.6.16尝试多提供者测试发现问题：
背景：使用jedis版本2.9.0,启动报错：
classNotFoundredis/clients/util/Pool
修改方法： 将jedis版本降至2.8.1即可
2）消费端启动报错，异常信息
org.apache.dubbo.rpc.RpcException: Fail to start server(url: dubbo://x.x.x.x:20880/com.hanhai.ccp.web.service.event.ITaskEvent?anyhost=true&application=ccp-wep&bind.ip=10.10.10.165&bind.port=20880&channel.readonly.sent=true&codec=dubbo&default=true&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&heartbeat=60000&interface=com.hanhai.ccp.web.service.event.ITaskEvent&methods=getTaskEvent,sendTaskEvent,getTaskDetail&pid=12818&qos.enable=false&release=2.7.6&side=provider×tamp=1592904686840) Failed to bind NettyServer on /10.10.10.165:20880, cause: Address already in use
at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.createServer(DubboProtocol.java:348) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.openServer(DubboProtocol.java:320) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.export(DubboProtocol.java:303) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:62) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:153) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:66) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.registry.integration.RegistryProtocol.lambda$doLocalExport$2(RegistryProtocol.java:244) ~[dubbo-2.7.6.jar:2.7.6]
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_202]
at org.apache.dubbo.registry.integration.RegistryProtocol.doLocalExport(RegistryProtocol.java:242) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.registry.integration.RegistryProtocol.export(RegistryProtocol.java:199) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:60) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:151) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:64) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:492) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:325) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:300) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:206) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.config.bootstrap.DubboBootstrap.lambda$exportServices$15(DubboBootstrap.java:917) ~[dubbo-2.7.6.jar:2.7.6]
at java.util.HashMap$Values.forEach(HashMap.java:981) ~[na:1.8.0_202]
at org.apache.dubbo.config.bootstrap.DubboBootstrap.exportServices(DubboBootstrap.java:905) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.config.bootstrap.DubboBootstrap.start(DubboBootstrap.java:745) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.config.spring.context.DubboBootstrapApplicationListener.onContextRefreshedEvent(DubboBootstrapApplicationListener.java:59) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.config.spring.context.DubboBootstrapApplicationListener.onApplicationContextEvent(DubboBootstrapApplicationListener.java:52) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.config.spring.context.OneTimeExecutionApplicationContextEventListener.onApplicationEvent(OneTimeExecutionApplicationContextEventListener.java:40) ~[dubbo-2.7.6.jar:2.7.6]
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:404) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:361) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:898) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:162) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:554) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
at com.hanhai.ccp.BootApplication.main(BootApplication.java:29) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_202]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_202]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_202]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_202]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.2.6.RELEASE.jar:2.2.6.RELEASE]
Caused by: org.apache.dubbo.remoting.RemotingException: Failed to bind NettyServer on /x.x.x.x:20880, cause: Address already in use
at org.apache.dubbo.remoting.transport.AbstractServer.(AbstractServer.java:77) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.remoting.transport.netty4.NettyServer.(NettyServer.java:77) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.remoting.transport.netty4.NettyTransporter.bind(NettyTransporter.java:35) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.remoting.Transporter$Adaptive.bind(Transporter$Adaptive.java) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.remoting.Transporters.bind(Transporters.java:56) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.remoting.exchange.support.header.HeaderExchanger.bind(HeaderExchanger.java:44) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.remoting.exchange.Exchangers.bind(Exchangers.java:70) ~[dubbo-2.7.6.jar:2.7.6]
at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.createServer(DubboProtocol.java:346) ~[dubbo-2.7.6.jar:2.7.6]
... 45 common frames omitted
Caused by: java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_202]
at sun.nio.ch.Net.bind(Net.java:433) ~[na:1.8.0_202]
at sun.nio.ch.Net.bind(Net.java:425) ~[na:1.8.0_202]
原因1：配置的包扫描问题，（扫描了基础包路径，一般配置扫描com.xxx.xxx.service）
修改为指定具体路径（确保唯一，很多项目都使用基础包路径，结果普通接口和dubbo提供的接口放在一起，这时会将其他接口也扫描进来，并当作服务端进行注册，会看到上述的错误）
修改包路径即可解决
关于包扫描配置说明2点：
dubbo:
scan:
base-packages: com.xxxx.ccp.service
a)服务提供者配置包扫描时，配置的是注解dubbo的@service所在的包路径（请确保唯一，否则出现奇奇怪怪的问题不便于排查）
b)消费端配置包扫描时，配置的是注解@Reference所在的包路径（请确保唯一,建议精确到impl层）
c)即使不配置base-packages程序也会自动扫描带有@Service的注解进行注册
原因2:服务实现类注解用错@service本应用Spring的，结果导成dubbo的注解
解决：修改为正确的注解
RestTemplate配置redis序列化、反序列化、spring 配置
package cn.venny.datas.core.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
/**
@author Vick C
@version 1.0
*/
@Configuration
public class RedisConfig {
@Bean
public RedisTemplate
RedisTemplate
template.setConnectionFactory(redisConnectionFactory);
template.setDefaultSerializer(new GenericJackson2JsonRedisSerializer());
return template;
}
}