(5)springcloud创建服务消费者（feign）

矫情吗；* 2023-05-29 05:09 6阅读 0赞

Feign默认集成了Ribbon，并和Eureka结合，默认实现了负载均衡的效果

1.创建文件夹 hello-spring-cloud-web-admin-feign

2.pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <parent>
            <groupId>com.itheima</groupId>
            <artifactId>hello-spring-cloud-dependencies</artifactId>
            <version>1.0.0-SNAPSHOT</version>
            <relativePath>../hello-spring-cloud-dependencies/pom.xml</relativePath>
        </parent>
    
        <artifactId>hello-spring-cloud-web-admin-feign</artifactId>
        <packaging>jar</packaging>
    
        <name>hello-spring-cloud-web-admin-feign</name>
        <url>http://www.ggbond.xyz</url>
        <inceptionYear>2019</inceptionYear>
    
        <dependencies>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-tomcat</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-thymeleaf</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
            
    
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
            
    
            
            <dependency>
                <groupId>net.sourceforge.nekohtml</groupId>
                <artifactId>nekohtml</artifactId>
            </dependency>
    
            
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <configuration>
                        <mainClass>com.itheima.hello.spring.cloud.web.admin.feign.WebAdminFeignApplication</mainClass>
                    </configuration>
                </plugin>
            </plugins>
        </build>
    
    </project>

2.Application

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
    import org.springframework.cloud.openfeign.EnableFeignClients;
    
    
    @SpringBootApplication
    @EnableFeignClients
    @EnableDiscoveryClient
    public class WebAdminFeignApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(WebAdminFeignApplication.class, args);
        }
    }

3.application.yml

spring:
      application:
        name: hello-spring-cloud-web-admin-feign
      thymeleaf:
        cache: false
        mode: LEGACYHTML5
        encoding: UTF-8
        servlet:
          content-type: text/html
    server:
      port: 8765
    
    eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8761/eureka

4.创建service

import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    
    /**
     * @author 
     * @date 2019/11/1 9:21
     */
    @FeignClient(value = "hello-spring-cloud-service-admin", fallback = AdminServiceHystrix.class)
    public interface AdminFeignService {
    
        @GetMapping("hi")
        public String sayHi(@RequestParam(value="message") String message);
    }

5.创建controller

import com.itheima.hello.spring.cloud.web.admin.feign.service.AdminFeignService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    
    
    @RestController
    public class AdminController {
    
        @Autowired
        private AdminFeignService adminFeignService;
    
        @GetMapping("hi")
        public String sayHi(String message) {
            return adminFeignService.sayHi(message);
        }
    
    }

![20191104144124198.png][]

刷新一会8762 一会8763 说明已经实现负载均衡

项目结构：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbnlmMjAxNg_size_16_color_FFFFFF_t_70][]

[20191104144124198.png]: https://img-blog.csdnimg.cn/20191104144124198.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbnlmMjAxNg_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191104152605442.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbnlmMjAxNg==,size_16,color_FFFFFF,t_70