Spring Cloud Fegin服务调用实战

构建Spring Cloud Fegin服务调用开发如下:

构建工程SpringBoot，名称为feign-consumer,配置pom.xml，关键是引入spring-cloud-starter-eureka和spring-cloud-starter-依赖，代码如下：

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

   <groupId>com.didispace</groupId>
   <artifactId>feign-consumer</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <packaging>jar</packaging>

<name>feign-consumer</name>
<description>Demo project for Spring Boot</description>

<parent>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-parent</artifactId>
       <version>1.3.7.RELEASE</version>
       <relativePath/> 
   </parent>

   <dependencies>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-web</artifactId>
       </dependency>

       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-test</artifactId>
           <scope>test</scope>
       </dependency>

       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-actuator</artifactId>
       </dependency>

       <dependency>
           <groupId>org.springframework.cloud</groupId>
           <artifactId>spring-cloud-starter-eureka</artifactId>
       </dependency>

       <dependency>
           <groupId>org.springframework.cloud</groupId>
           <artifactId>spring-cloud-starter-feign</artifactId>
       </dependency>

       <dependency>
           <groupId>com.didispace</groupId>
           <artifactId>hello-service-api</artifactId>
           <version>0.0.1-SNAPSHOT</version>
       </dependency>
   </dependencies>

   <dependencyManagement>
       <dependencies>
           <dependency>
               <groupId>org.springframework.cloud</groupId>
               <artifactId>spring-cloud-dependencies</artifactId>
               <version>Brixton.SR5</version>
               <type>pom</type>
               <scope>import</scope>
           </dependency>
       </dependencies>
   </dependencyManagement>

   <build>
       <plugins>
           <plugin>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-maven-plugin</artifactId>
           </plugin>
       </plugins>
   </build>

</project>

创建主类ConsumerApplication

@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication
public class ConsumerApplication {

//   @Bean
//   Logger.Level feignLoggerLevel() {
//       return Logger.Level.FULL;
//   }

   public static void main(String[] args) {
       SpringApplication.run(ConsumerApplication.class, args);
   }

}

定义服务接口名称HelloService，通过@FeignClient注解实现

@FeignClient(name="HELLO-SERVICE", fallback = HelloServiceFallback.class)
public interface HelloService {

@RequestMapping("/hello")
String hello();

}

创建一个类ConsumerController调用这个接口HelloService

@RestController
public class ConsumerController {

@Autowired
HelloService helloService;
@Autowired
RefactorHelloService refactorHelloService;

@RequestMapping(value = "/feign-consumer", method = RequestMethod.GET)
public String helloConsumer() {
return helloService.hello();
} }

在服务中心注册这个ConsumerController，方便调用

spring.application.name=feign-consumer
server.port=9001

eureka.client.serviceUrl.defaultZone=http://localhost:1111/eureka/

测试验证

http://localhost:9001/feign-consummer,返回“Hello Word”

Spring Cloud Fegin服务调用实战

猜你喜欢