feign负载均衡

女爷i 2023-03-01 12:57 23阅读 0赞

springcloud实现负载均衡有ribbon和feign，feign主要是接口

首先是pom和application.yml

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
                <version>2.2.3.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
                <version>2.2.3.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
                <version>2.2.3.RELEASE</version>
            </dependency>

server:
      port: 80
    spring:
      application:
        name: dept80
    eureka:
      client:
        service-url:
          defaultZone: http://eureka7001:7001/eureka/

定义feign接口，调用的微服务名称product-dept表示要调用的微服务名称，@RequestMapping("/deptList")对应次微服务方法

@FeignClient(value = "product-dept")
    public interface DeptFeignService {
        @RequestMapping("/deptList")
        List<DeptEntity> queryDeptList();
    }

然后是controller和启动类

@SpringBootApplication
    @EnableEurekaClient
    @EnableFeignClients(basePackages = {"com.sinosoft.springcloud"})
    public class FeignApplication {
        public static void main(String[] args) {
            SpringApplication.run(FeignApplication.class, args);
        }
    }

@RestController
    public class DeptController {
        @Autowired
        private DeptFeignService service;
    
        @RequestMapping("deptList")
        public List<DeptEntity> queryDeptList(){
            return service.queryDeptList();
        }
    }

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