本篇内容基于之前笔记所涉及的实例。
- 一个服务注册中心——eurekaserver:8081
- 三个服务者——peoduceserver:8082/peoduceserver:8083/peoduceserver:8084
第一步,新建名为service-feign的springboot工程,pom.xml文件如下:
<?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.forezp</groupId> <artifactId>service-feign</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>service-feign</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.4.0.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <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>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> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Dalston.RC1</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> <repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> </project>
第二步,编辑application.yml配置文件。端口号8100,服务名service-fegin。
eureka: client: serviceUrl: defaultZone: http://localhost:8081/eureka/ server: port: 8100 spring: application: name: service-feign #服务名
第三步,定义一个feign接口,通过@ FeignClient(“服务名”),来指定调用的服务。
此处我是调用了peoduceserver服务的“/hello”接口,代码如下:
@FeignClient(value = "peoduceserver") public interface FeignService { @RequestMapping(value = "/hello",method = RequestMethod.GET) String helloFeign(); }
第四步,定义一个FeignContrller,调用以上的servcie接口。
@RestController public class FeignContrller{ @Autowired FeignService feignService; @RequestMapping(value = "/hello",method = RequestMethod.GET) public String helloFegin(){ return feignService.helloFeign(); } }第五步,启动服务。浏览器输入 http://localhost:8100/hello访问。效果如下: