spring cloud服务发现与消费

╰半橙微兮° 2021-09-28 03:12 313阅读 0赞

### 服务发现与消费 ###

1.  创建服务消费者

2.  引入依赖

<?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>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.1.RELEASE</version>
            <relativePath/> 
        </parent>
        <groupId>com.zyl</groupId>
        <artifactId>consumer</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>consumer</name>
        <description>Demo project for Spring Boot</description>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <spring-cloud.version>Finchley.SR2</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-eureka-client</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-ribbon</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>${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>
    
        <repositories>
            <repository>
                <id>spring-milestones</id>
                <name>Spring Milestones</name>
                <url>https://repo.spring.io/milestone</url>
            </repository>
        </repositories>
    
    </project>

3.  主应用添加注释，并且添加负载均衡

@EnableDiscoveryClient
    @SpringBootApplication
    public class ConsumerApplication {
        @Bean
        @LoadBalanced
        RestTemplate template(){
            return new RestTemplate();
        }
        public static void main(String[] args) {
            SpringApplication.run(ConsumerApplication.class, args);
        }
    
    }

4.  编写服务消费的Controller

@RestController
    public class ConsumerController {
    
        @Autowired
        RestTemplate restTemplate;
    
        @RequestMapping(value = "/ribben-consumer")
        public String helloConsumer(){
            return restTemplate.getForEntity("http://demo-server/index",String.class).getBody();
        }
    }

在这里可以看到访问的是服务名，而不是具体的地址

5.  配置文件

spring.application.name=consumer
    server.port=9000
    
    eureka.client.service-url.defaultZone=http://one:7998/eureka/,http://three:7999/eureka/