提示：本人小白一枚，若有错误请提出。
1.创建工程项目● 父工程 ------- maven项目
● 接口模块------- maven项目
● 提供者模块------- springboot项目
● 消费者模块------- springboot项目
创建两个service接口
public interface UserService {
public String getUserAddressList();
}
public interface OrderService {
public void initOrder();
}
3.创建提供者模块
3.1 导入相关依赖包
4.0.0 org.springframework.boot spring-boot-starter-parent 2.0.1.RELEASE com.sunl boot-user-service-provider 0.0.1-SNAPSHOT boot-user-service-provider boot-user-service-provider 1.8 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test com.sunl boot-interface-api 1.0-SNAPSHOT org.springframework.cloud spring-cloud-starter-netflix-hystrix 2.0.3.RELEASE com.alibaba.spring.boot dubbo-spring-boot-starter 2.0.0 org.apache.zookeeper zookeeper 3.8.0 org.slf4j slf4j-log4j12 com.101tec zkclient 0.11 org.springframework.boot spring-boot-maven-plugin
3.2 创建用户服务接口实现类spring-boot-starter-parent与spring-cloud-starter-netflix-hystrix要相互兼容，否则会报错
Caused by: java.lang.ClassNotFoundException:
org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata
@Service
@Component
public class UserServiceImpl implements UserService {
@HystrixCommand
@Override
public String getUserAddressList() {
System.out.println("==============UserServiceImpl......20883=================");
double num = Math.random();
System.out.println(num);
if (num > 0.5){
throw new RuntimeException();
}
return "获取到数字 " + num;
}
}
@Service(version = “1.0.0”, retries = 2)引用的是阿里巴巴的依赖 import
com.alibaba.dubbo.config.annotation.Service;
fallbackMethod：标记的是捕获异常时需要执行的方法，方法名称跟value值要一样
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'configurationPropertiesBeans' defined in class path resource [org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:597) ~[spring-beans-5.3.19.jar:5.3.19] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.19.jar:5.3.19] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.19.jar:5.3.19] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.19.jar:5.3.19] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.19.jar:5.3.19] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213) ~[spring-beans-5.3.19.jar:5.3.19] at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:270) ~[spring-context-5.3.19.jar:5.3.19] at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:762) ~[spring-context-5.3.19.jar:5.3.19] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:567) ~[spring-context-5.3.19.jar:5.3.19] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) [spring-boot-2.6.7.jar:2.6.7] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) [spring-boot-2.6.7.jar:2.6.7] at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-2.6.7.jar:2.6.7] at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:164) ~[spring-boot-2.6.7.jar:2.6.7] at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:212) ~[spring-cloud-context-2.2.9.RELEASE.jar:2.2.9.RELEASE] at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:117) ~[spring-cloud-context-2.2.9.RELEASE.jar:2.2.9.RELEASE] at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:74) ~[spring-cloud-context-2.2.9.RELEASE.jar:2.2.9.RELEASE] at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.19.jar:5.3.19] at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.19.jar:5.3.19] at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.19.jar:5.3.19] at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131) ~[spring-context-5.3.19.jar:5.3.19] at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85) ~[spring-boot-2.6.7.jar:2.6.7] at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66) ~[spring-boot-2.6.7.jar:2.6.7] at java.util.ArrayList.forEach(ArrayList.java:1249) ~[na:1.8.0_92] at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120) ~[spring-boot-2.6.7.jar:2.6.7] at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114) ~[spring-boot-2.6.7.jar:2.6.7] at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65) ~[spring-boot-2.6.7.jar:2.6.7] at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:339) [spring-boot-2.6.7.jar:2.6.7] at org.springframework.boot.SpringApplication.run(SpringApplication.java:297) [spring-boot-2.6.7.jar:2.6.7] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) [spring-boot-2.6.7.jar:2.6.7] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) [spring-boot-2.6.7.jar:2.6.7] at com.sunl.dubbo.BootUserServiceProviderApplication.main(BootUserServiceProviderApplication.java:19) [classes/:na] Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2] at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:485) ~[spring-core-5.3.19.jar:5.3.19] at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321) ~[spring-core-5.3.19.jar:5.3.19] at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.buildLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:232) ~[spring-beans-5.3.19.jar:5.3.19] at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.findLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:210) ~[spring-beans-5.3.19.jar:5.3.19] at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(InitDestroyAnnotationBeanPostProcessor.java:149) ~[spring-beans-5.3.19.jar:5.3.19] at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:305) ~[spring-context-5.3.19.jar:5.3.19] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1116) ~[spring-beans-5.3.19.jar:5.3.19] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.3.19.jar:5.3.19] ... 30 common frames omitted Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_92] at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_92] at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_92] at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:467) ~[spring-core-5.3.19.jar:5.3.19] ... 37 common frames omitted Caused by: java.lang.ClassNotFoundException: org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_92] at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_92] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_92] at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_92] ... 41 common frames omitted Process finished with exit code 13.3 配置文件配置属性
#配置端口 server.port=8082 #表示当前应用的名字,必须指定一个唯一的名称 dubbo.application.name=boot-user-service-provider #注册中心地址 dubbo.registry.address=zookeeper://localhost:2181 dubbo.registry.protocol=zookeeper #配置协议和端口 （默认是20880，修改端口，不同的服务提供者端口不能重复） dubbo.protocol.name=dubbo dubbo.protocol.port=20880
此处配置，最后改成了spring容器托管
package com.sunl.dubbo.config;
import com.alibaba.dubbo.config.*;
import com.sunl.dubbo.service.UserService;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.ArrayList;
@Configuration
public class MyDubboConfig {
@Bean
public ApplicationConfig applicationConfig(){
ApplicationConfig applicationConfig = new ApplicationConfig();
applicationConfig.setName("boot-user-service-provider");
applicationConfig.setId("boot-user-service-provider");
return applicationConfig;
}
@Bean
public RegistryConfig registryConfig(){
RegistryConfig registryConfig = new RegistryConfig();
registryConfig.setProtocol("zookeeper");
registryConfig.setAddress("127.0.0.1:2181");
return registryConfig;
}
@Bean
public ProtocolConfig protocolConfig(){
ProtocolConfig protocolConfig = new ProtocolConfig();
protocolConfig.setName("dubbo");
protocolConfig.setPort(20883);
return protocolConfig;
}
@Bean
public ServiceConfig serviceConfig(UserService userService){
ServiceConfig serviceConfig = new ServiceConfig<>();
serviceConfig.setInterface(UserService.class);
serviceConfig.setRef(userService);
serviceConfig.setTimeout(1000);
serviceConfig.setVersion("1.0.0");
MethodConfig methodConfig = new MethodConfig();
methodConfig.setName("getUserAddressList");
methodConfig.setTimeout(1000);
//将method设置关联到service配置中
ArrayList methods = new ArrayList<>();
methods.add(methodConfig);
serviceConfig.setMethods(methods);
return serviceConfig;
}
}
3.4 配置启动类，并启动
@EnableDubbo
@EnableHystrix
@SpringBootApplication
public class BootUserServiceProviderApplication {
public static void main(String[] args) {
SpringApplication.run(BootUserServiceProviderApplication.class, args);
}
}
打开http://localhost:7001/确认提供者服务打开
4.2 新建控制层调用业务接口4.0.0 org.springframework.boot spring-boot-starter-parent 2.0.1.RELEASE com.sunl boot-order-service-consumer 0.0.1-SNAPSHOT boot-order-service-consumer boot-order-service-consumer 1.8 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test com.sunl boot-interface-api 1.0-SNAPSHOT org.springframework.cloud spring-cloud-starter-netflix-hystrix 2.0.3.RELEASE com.alibaba.spring.boot dubbo-spring-boot-starter 2.0.0 org.apache.zookeeper zookeeper 3.8.0 org.slf4j slf4j-log4j12 com.101tec zkclient 0.11 org.springframework.boot spring-boot-maven-plugin org.apache.maven.plugins maven-surefire-plugin true
@Controller
public class OrderController {
@Autowired
OrderService orderService;
@RequestMapping("/initOrder")
@ResponseBody
public String initOrder(){
return orderService.initOrder();
}
}
4.3 新增订单业务接口实现类
@Service
public class OrderServiceImpl implements OrderService {
@Reference(loadbalance = "random")
private UserService userService;
public String fallbackMethod() {
System.out.println("========fallbackMethod===========");
return "熔断测试";
}
@HystrixCommand(fallbackMethod = "fallbackMethod")
@Override
public String initOrder() {
System.out.println("===========initOrder============");
return userService.getUserAddressList();
}
}
@Reference(loadbalance = “random”)是dubbo的注解，也是注入，他一般注入的是分布式的远程服务的对象，需要dubbo配置使用
配置dubbo属性
# 默认端口 server.port=8083 # 指定一个唯一的名称 dubbo.application.name=boot-order-service-consumer # 注册中心 dubbo.registry.address=zookeeper://localhost:2181 dubbo.registry.protocol=zookeeper4.4 配置启动类，并启动
@EnableDubbo
@EnableHystrix
@SpringBootApplication
public class BootOrderServiceConsumerApplication {
public static void main(String[] args) {
SpringApplication.run(BootOrderServiceConsumerApplication.class, args);
}
}
打开http://localhost:7001/确认消费者服务打开
调用http://localhost:8083/initOrder接口
