• openFeign的使用步骤


    这里做一个简单的demo演示

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    1)新建module cloud-consumer-feign-order80

    这里标注了各个文件和包!!!

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    2) 添加依赖

    <dependencies>
        <!--openfeign-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <!--eureka client-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!-- 引入自己定义的api通用包,可以使用Payment支付Entity -->
        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <!--web-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--一般基础通用配置-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    3)编写application.xml

    server:
      port: 80
    
    eureka:
      client:
        register-with-eureka: false
        service-url:
          defaultZone: http://localhost:7001/eureka,http://localhost:7002/eureka

    4)主启动类

    @SpringBootApplication
    @EnableFeignClients //开启FeignClinet
    public class OrderFeignMain80 {
        public static void main(String[] args) {
            SpringApplication.run(OrderFeignMain80.class,args);
        }
    }

    5)编写业务类

    @RestController
    @Slf4j
    public class OrderFeignController {
    
        @Autowired
        private PaymentFeignService paymentFeignService;
    
        @GetMapping(value = "/feign/payment/get/{id}")
        public CommonResult getPaymentById(@PathVariable("id") Long id){
            return paymentFeignService.getPaymentById(1L);
        }
    }
    // 在服务调用者方,声明远程调用服务的接口
    @Component
    // 这个注解是及其重要的,表明了远程调用的服务 (这里的远程服务我上面的博客有,就不再重复写了) @FeignClient(value = "CLOUD-PAYMENT-SERVICE") public interface PaymentFeignService { //通过这个注解找远程服务controller下 带有该注解的接口 @GetMapping(value = "/payment/get/{id}") public CommonResult getPaymentById(@PathVariable("id") Long id); }

    6)测试

    远程服务调用成功!!

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  • 原文地址:https://www.cnblogs.com/houchen/p/13521008.html
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