非集群实现

1.Eurek 服务器端实现--注册中心：

pom.xml 包依赖如下：

 <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.RELEASE</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</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</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>

application.yml 注册中心配置

###服务端口号
server:
  port: 8100
###eureka 基本信息配置
eureka:
  instance:
    ###注册到eurekaip地址
    hostname: 127.0.0.1
  client:
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
    ###因为自己是为注册中心，不需要自己注册自己
    register-with-eureka: false
    ###因为自己是为注册中心，不需要检索服务
    fetch-registry: false

启动Eureka服务：

@EnableEurekaServer
@SpringBootApplication
public class AppEureka {

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

}

注册服务提供者：

  <!-- 管理依赖 -->
    <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>

    <dependencies>
        <!-- SpringBoot整合Web组件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- SpringBoot整合eureka客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
    </dependencies>
    <!-- 注意： 这里必须要添加， 否者各种依赖有问题 -->
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

application.yml 文件配置

###服务启动端口号
server:
  port: 8010
###服务名称(服务注册到eureka名称)
spring:
  application:
    name: api-node1-member
###服务注册到eureka地址
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8100/eureka

    ###因为该应用为注册中心，不会注册自己
    register-with-eureka: true
    ###是否需要从eureka上获取注册信息
    fetch-registry: true

服务消费者服务配置

Maven依赖信息

 <!-- 管理依赖 -->
    <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>

    <dependencies>
        <!-- SpringBoot整合Web组件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- SpringBoot整合eureka客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

    </dependencies>

application.yml 文件配置

###服务启动端口号
server:
  port: 8001
###服务名称(服务注册到eureka名称)
spring:
  application:
    name: app-node-order
###服务注册到eureka地址
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8100/eureka


    ###因为该应用为注册中心，不会注册自己
    register-with-eureka: true
    ###是否需要从eureka上获取注册信息
    fetch-registry: true

使用rest方式调用服务

@RestController
public class OrderController {
	@Autowired
	private RestTemplate restTemplate;

	@RequestMapping("/getorder")
	public String getOrder() {
		// order 使用rpc 远程调用技术 调用 会员服务
		String memberUrl = "http://app-itmayiedu-member/getMember";
		String result = restTemplate.getForObject(memberUrl, String.class);
		System.out.println("会员服务调用订单服务,result:" + result);
		return result;
	}

}

启动消费者服务

@SpringBootApplication
@EnableEurekaClient
public class AppOrder {

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

	@Bean
	@LoadBalanced
	RestTemplate restTemplate() {
		return new RestTemplate();
	}

}

@LoadBalanced就能让这个RestTemplate在请求时拥有客户端负载均衡的能力

最后

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