SpringCloud third chapter: the service consumer (Feign)

To undertake the removal of a ribbon

Need to start

• EurekaService port number 8100
• EurekaClient * 2 port numbers 8101,8102
• feign service port number 8105

1. Create a new project called service-feign SpringBoot

2. Modify pom file to add the following dependency

   • spring-cloud-starter-openfeign
   • spring-boot-starter-web
   • spring-cloud-starter-netflix-eureka-client

   pom file as follows

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   > ><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> > <parent> > <groupId>com.kthirty</groupId> > <artifactId>springboot-parent</artifactId> > <version>0.0.1-SNAPSHOT</version> > <relativePath/> > </parent> > <artifactId>service-feign</artifactId> > <version>0.0.1-SNAPSHOT</version> > <packaging>jar</packaging> > <name>service-feign</name> > <description>Demo project for Spring Boot</description> > <dependencies> > <dependency> > <groupId>org.springframework.boot</groupId> > <artifactId>spring-boot-starter-web</artifactId> > </dependency> > <dependency> > <groupId>org.springframework.cloud</groupId> > <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> > </dependency> > <dependency> > <groupId>org.springframework.cloud</groupId> > <artifactId>spring-cloud-starter-openfeign</artifactId> > </dependency> > <dependency> > <groupId>org.springframework.boot</groupId> > <artifactId>spring-boot-starter-test</artifactId> > <scope>test</scope> > </dependency> > </dependencies> ></project> >

3. Application.yml modify the configuration file, the full file registration services as follows

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   > the Spring: > the Application: > name: Service-Feign > > Server: > large column  SpringCloud third chapter: the service consumer (Feign) Port: 8105 > Eureka: > Client: > Service-url: > defaultzone: HTTP: localhost //: 8100 / Eureka / >

4. Modify the startup class

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   >package com.kthirty.servicefeign; > >import org.springframework.boot.SpringApplication; >import org.springframework.boot.autoconfigure.SpringBootApplication; >import org.springframework.cloud.client.discovery.EnableDiscoveryClient; >import org.springframework.cloud.netflix.eureka.EnableEurekaClient; >import org.springframework.cloud.openfeign.EnableFeignClients; > >@SpringBootApplication >@EnableDiscoveryClient >@EnableEurekaClient >@EnableFeignClients //开启Feign功能 >public class { > > public static void main(String[] args) { > SpringApplication.run(ServiceFeignApplication.class, args); > } >} >

5. 添加feign接口

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   >package com.kthirty.servicefeign.interfaces; > >import org.springframework.cloud.openfeign.FeignClient; >import org.springframework.web.bind.annotation.RequestMapping; >import org.springframework.web.bind.annotation.RequestMethod; >import org.springframework.web.bind.annotation.RequestParam; > >@FeignClient("client1")//指定调用服务名 >public interface SchedualServiceHi { > @RequestMapping(value = "/hello",method = RequestMethod.GET)//服务链接 > String sayHiFormClientOne(@RequestParam String name); >} >

6. 创建HiController消费服务

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   >package com.kthirty.servicefeign.web; > >import com.kthirty.servicefeign.interfaces.SchedualServiceHi; >import org.springframework.beans.factory.annotation.Autowired; >import org.springframework.web.bind.annotation.RequestMapping; >import org.springframework.web.bind.annotation.RequestParam; >import org.springframework.web.bind.annotation.RestController; > >@RestController >public class HiController { > //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 > private SchedualServiceHi schedualServiceHi; > @RequestMapping("/hi") > public String sayHi(@RequestParam String name){ > return schedualServiceHi.sayHiFormClientOne(name); > } >} >

启动测试

同上一篇将Ribbon服务替换为feign服务即可

访问链接[http://localhost:8105/hi?name=thirty]:http://localhost:8105/hi?name=thirty