spring cloud基础知识 ——spring cloud 的服务消费者rest + ribbon(三)

ゞ浴缸里的玫瑰 2022-12-05 09:58 96阅读 0赞

开发工具idea，开发技术spring cloud

我的学习借鉴了 [https://blog.csdn.net/sky786905664/article/details/78995068][https_blog.csdn.net_sky786905664_article_details_78995068]

作者 [Sky786905664][] 的一些文章

新建工程module：service-ribbon

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hfal9jXzEyMw_size_16_color_FFFFFF_t_70][]

依赖如下：

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
       <modelVersion>4.0.0</modelVersion>
       <parent>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-parent</artifactId>
          <version>2.3.3.RELEASE</version>
          <relativePath/> 
       </parent>
       <groupId>com.dream.cloud</groupId>
       <artifactId>service-ribbon</artifactId>
       <version>0.0.1-SNAPSHOT</version>
       <name>service-ribbon</name>
       <description>Demo project for Spring Boot</description>
    
       <properties>
          <java.version>1.8</java.version>
          <spring-cloud.version>Hoxton.SR8</spring-cloud.version>
       </properties>
    
       <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-ribbon</artifactId>
          </dependency>
    
          <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
          </dependency>
    
          <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
             <exclusions>
                <exclusion>
                   <groupId>org.junit.vintage</groupId>
                   <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
             </exclusions>
          </dependency>
       </dependencies>
    
       <dependencyManagement>
          <dependencies>
             <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</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>

配置文件如下：

server.port=8084
    spring.application.name=service-ribbon
    eureka.client.serviceUrl.defaultZone=http://localhost:8081/eureka/
    
    在启动类上加上 @EnableDiscoveryClient 和 @EnableEurekaClient 注解

然后开始负载均衡：

启动类如下

@SpringBootApplication
    @EnableDiscoveryClient
    @EnableEurekaClient
    public class ServiceRibbonApplication {
    
       public static void main(String[] args) {
          SpringApplication.run(ServiceRibbonApplication.class, args);
       }
    
       // 开启负载均衡
       @Bean
       @LoadBalanced
       RestTemplate restTemplate(){
          return new RestTemplate();
       }
    }

新建controller

@RestController
    public class HelloControler {
        @Autowired
        HelloService helloService;
    
        @RequestMapping(value = "/hi")
        public String hi(@RequestParam String name) {
            return helloService.hiService(name);
        }
    }

新建service

public interface HelloService {
        public String hiService(String name);
    }

实现service

@Service
    public class HelloServiceImpl implements HelloService {
        @Autowired
        RestTemplate restTemplate;
    
        @Override
        public String hiService(String name) {
            return restTemplate.getForObject("http://eurekaclient/index/hi?name=" + name, String.class);
        }
    }

启动注册中心全部eureka-server 和 eureka-client (eureka-client启动两个才能看出负载均衡)

访问地址：

[http://localhost:8084/hi?name=forezp][http_localhost_8084_hi_name_forezp]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hfal9jXzEyMw_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hfal9jXzEyMw_size_16_color_FFFFFF_t_70 2][]

可以看出服务向两个eureka-client 分别请求，实现了负载均衡，然后也对服务进行了消费

码云地址：[https://gitee.com/hjc2/springcloud.git][https_gitee.com_hjc2_springcloud.git]

[https_blog.csdn.net_sky786905664_article_details_78995068]: https://blog.csdn.net/sky786905664/article/details/78995068
[Sky786905664]: https://me.csdn.net/Sky786905664
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hfal9jXzEyMw_size_16_color_FFFFFF_t_70]: /images/20221123/ec099d251fc442a4ab0381b5432a3fca.png
[http_localhost_8084_hi_name_forezp]: http://localhost:8084/hi?name=forezp
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hfal9jXzEyMw_size_16_color_FFFFFF_t_70 1]: /images/20221123/01639875be83486bb51bb1a4290a88ac.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hfal9jXzEyMw_size_16_color_FFFFFF_t_70 2]: /images/20221123/0b594566fe04424b81e4cfdb79fed1a8.png
[https_gitee.com_hjc2_springcloud.git]: https://gitee.com/hjc2/springcloud.git