加上@EnableHystrix注解开启断路器，这个是必须的，并且需要在程序中声明断路点HystrixCommand；加上@EnableHystrixDashboard注解，开启HystrixDashboard
3. yml配置 server: port: 8761 eureka: instance: hostname: localhost client: registerWithEureka: false fetchRegistry: false serviceUrl: defaultZone: ${eureka.instance.hostname}:${server.port}/eureka/ spring: application: name: eurka-server 4. bootstrap.properties ##配置中心客户端 spring.application.name=config-client spring.cloud.config.label=master spring.cloud.config.profile=dev spring.cloud.config.uri= :8888/ server.port=8881 ##链路追踪客户端 server.port=8988 spring.zipkin.base-url=http://localhost:9411 spring.application.name=service-hi 4. Feign消费者服务中心 1. pom依赖 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 "> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Finchley.RELEASE</spring-cloud.version> </properties> <dependencies> <!-- 1: 发现中心依赖 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- 2: feign代理 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <!-- 3: hystrix熔断 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix</artifactId> </dependency> <!-- 4:配置中心客户端 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-config</artifactId> </dependency> <!-- 5：链路追踪客户端 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zipkin</artifactId> </dependency> <!-- 6:-hystrix-dashboard客户端 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId> </dependency> <!-- 7:监控中心客户端 --> <dependency> <groupId>de.codecentric</groupId> <artifactId>spring-boot-admin-starter-client</artifactId> <version>2.1.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> 2. Application.java @SpringBootApplication @EnableEurekaClient @EnableDiscoveryClient @EnableFeignClients @RestController @EnableHystrix @EnableEurekaServer public class ServiceFeignApplication { public static void main(String[] args) { SpringApplication.run( ServiceFeignApplication.class, args ); } //编译器报错，无视。 因为这个Bean是在程序启动的时候注入的，编译器感知不到，所以报错。 @Autowired SchedualServiceHi schedualServiceHi; @GetMapping(value = "/hi") public String sayHi(@RequestParam String name) { return schedualServiceHi.sayHiFromClientOne( name ); } } @FeignClient(value = "service-hi") public interface SchedualServiceHi { @RequestMapping(value = "/hi",method = RequestMethod.GET) String sayHiFromClientOne(@RequestParam(value = "name") String name); } @Component public class SchedualServiceHiHystric implements SchedualServiceHi { @Override public String sayHiFromClientOne(String name) { return "sorry "+name; } }
@ FeignClient（“服务名”），来指定调用哪个服务
@EnableHystrix注解开启Hystrix