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SpringCloudEureka 服务注册与发现以及调用-例子记录

程序员文章站 2022-06-12 19:18:49
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例子github地址：https://github.com/winterme/eureka

A.eureka server

1.pom

<?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.zzq</groupId>
    <artifactId>spring-cloud-eureka-server</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>

    <name>spring-cloud-eureka-server</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <java.version>1.8</java.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
    </parent>

    <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-server</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>


    <build>
        <plugins>
            <!-- 编译插件 -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2.yml

spring:
  application:
    name: euruka-server
server:
  port: 8761
eureka:
  client:
    fetch-registry: false
    register-with-eureka: false
    service-url:
      defaultZone: http://127.0.0.1:8761/eureka/

3.启动类

@SpringBootApplication
// 启动服务注册服务
@EnableEurekaServer
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

B.服务提供者

1.pom

<?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.zzq</groupId>
    <artifactId>spring-cloud-eureka-produce</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>

    <name>spring-cloud-eureka-produce</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <java.version>1.8</java.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
    </parent>

    <dependencies>
        <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-web</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>


    <build>
        <plugins>
            <!-- 编译插件 -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2.yml

spring:
  application:
    # 指定微服务的名称，后续在调用的时候，只需要使用该名称就可以进行服务访问
    name: springcloud-produce
server:
  port: 7070
eureka:
  client:
    service-url:
      # 服务注册中心的配置内容，指定服务注册中心的 url
      defaultZone: http://127.0.0.1:8761/eureka/

3.启动类

@SpringBootApplication
// 服务生产者
@EnableEurekaClient
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

4.控制器，此处的方便供其他服务调用

@RestController
public class GetInfo {

    @GetMapping("/get/{name}")
    public String getName(@PathVariable("name")String name){

        return name + (new Date().getTime());
    }

}

C.服务消费者

1.pom

<?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.zzq</groupId>
    <artifactId>spring-cloud-eureka-produce</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>

    <name>spring-cloud-eureka-produce</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <java.version>1.8</java.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</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-web</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>


    <build>
        <plugins>
            <!-- 编译插件 -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2.yml

spring:
  application:
    name: springcloud-consume
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:8761/eureka/
server:
  port: 9090

# 设置超时,默认超时 5 秒，时间太短，得设置长一点
ribbon:
  ReadTimeout: 60000
  ConnectTimeout: 60000

3.编写远程调用接口

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;

@FeignClient(value = "springcloud-produce")
public interface GetNameRemote {

    @GetMapping("/get/{name}")
    public String getName(@PathVariable("name") String name);

}

4.控制器里面调用


    @Autowired
    private GetNameRemote getNameRemote;

    @RequestMapping("/get/me/{name}")
    public String getName(@PathVariable("name")String name){
        return getNameRemote.getName(name);
    }

5.启动

@SpringBootApplication
//启用服务注册与发现
@EnableDiscoveryClient
//启用feign进行远程调用
@EnableFeignClients
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

 

效果:

在 消费者项目里面访问  http://127.0.0.1:9090/get/me/licm 远程调用 springcloud-produce 得 getName 方法，返回数据

SpringCloudEureka 服务注册与发现以及调用-例子记录

 

思考：一个项目能否同时作为 服务提供者 和 服务消费者呢

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