搭建一個Eureka註冊服務（註冊中心）
Maven依賴
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<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.2.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties>
<dependencies> <!--eureka server --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka-server</artifactId> </dependency> <!-- spring boot test --> <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>Dalston.RC1</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> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> |
創建配置
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server: port: 8001 eureka: instance: hostname: localhost client: service-url: defaultZone: http://${eureka.instance.hostname}/${server.port}/eureka/ register-with-eureka: false fetch-registry: false #registerWithEureka表示是否註冊自身到eureka服務器，因爲當前這個應用就是eureka服務器，沒必要註冊自身，所以這裏是false。 #fetchRegistry表示是否從eureka服務器獲取註冊信息，同上，這裏不需要。 |
創建springboot的啓動類
啓動
訪問看下
eureka的服務就啓動了
我們在創建maven搭建會員服務
創建項目service-member
Maven依賴
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<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.2.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</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>Dalston.RC1</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> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> |
application.yml配置
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eureka: client: serviceUrl: defaultZone: http://localhost:8001/eureka/ server: port: 8002 spring: application: name: membe-rservice |
服務接口
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@RestController public class MemberController {
@RequestMapping("/getUserList") public List<String> getUserList() { List<String> listUser = new ArrayList<String>(); listUser.add("zhangsan"); listUser.add("lisi"); listUser.add("yushengjun"); return listUser; }
} |
發佈服務
通過註解@EnableEurekaClient 表明自己是一個eurekaclient.
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@SpringBootApplication @EnableEurekaClient public class AppMember {
public static void main(String[] args) { SpringApplication.run(AppMember.class, args); }
} |
啓動後，我們再看下eureka註冊中心
在搭建一個訂單服務
Maven依賴
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<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.2.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent>
<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties>
<dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-ribbon</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</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>Dalston.RC1</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> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> |
配置
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eureka: client: service-url: defaultZone: http://localhost:8001/eureka/ server: port: 8003 spring: application: name: order-service |
service
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@Service public class OrderService {
@Autowired RestTemplate restTemplate;
public List<String> getOrderByUserList(){ //member-service 就是之前會員服務的spring。application。name的名字 return restTemplate.getForObject("http://member-service/getUserList",List.class); } } |
controller
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@RestController public class OrderController { @Autowired private OrderService orderMemberService;
@RequestMapping("/getOrderUserAll") public List<String> getOrderUserAll() { System.out.println("訂單服務開始調用會員服務"); return orderMemberService.getOrderByUserList();
}
} |
啓動類
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@SpringBootApplication @EnableEurekaClient public class OrderApp { public static void main( String[] args ) { SpringApplication.run(OrderApp.class,args); System.out.println( "Hello World!" ); }
@Bean @LoadBalanced //這個註解代表開啓負載均衡 RestTemplate restTemplate(){ return new RestTemplate(); } } |
訪問就可以獲取到userlist了
http://localhost:8003/getOrderUserAll
ribbon是一個負載均衡客戶端 類似nginx反向代理，可以很好的控制htt和tcp的一些行爲。Feign默認集成了ribbon。
啓動那個兩個會員服務，不同的端口（8002,8004），訂單服務是已經開啓了負載均衡，進行訪問會走向不同的會員服務
