Eureka搭建

1.注册中心server端

1.1.引入依赖

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>

1.2.配置

server:port: 8761
spring:application:name: eureka-server #服务名称,如多台server，那么保持一致security: #security用户名密码user:name: rootpassword: root
eureka:instance:hostname: localhostprefer-ip-address: true #设置显示ip地址instance-id: ${spring.cloud.client.ipaddress}:${server.port}client:fetch-registry: false #是否注册自己默认为true，如果register-with-eureka: falseservice-url: #注册中心地址  root:root@ 为security用户名密码defaultZone: http://root:root@localhost:8761/eureka/ #http://root:root@${eureka.instance.hostname}:${server.port}/eureka/

1.3.server端security配置

@EnableWebSecurity
@Configuration
public class SecurityConfiguration extends WebSecurityConfigurerAdapter  {@Overrideprotected void configure(HttpSecurity http) throws Exception {super.configure(http);//解决/eureka下的跨域问题http.csrf().ignoringAntMatchers("/eureka/**");}}

1.4.启动类加上

@EnableEurekaServer

2.provider服务提供方

2.1.client端依赖

<dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

2.2.client配置

server:port: 7070spring:application:name: service-provider #服务名称，多来provider服务名保持一致eureka:instance:hostname: localhostprefer-ip-address: trueinstance-id: ${spring.cloud.client.ipaddress}:${server.port}client:service-url:	defaultZone: http://root:root@localhost:8761/eureka/ #,http://localhost:8762/eureka/ 注册中心url多个注册中心用","分隔service-provider: #ribbon配置 service-provider为服务名ribbon: #RandomRule为轮询NFLoadBlanceRuleClassName: com.netflix.loadblancer.RandomRule

2.3.提供服务接口

@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {@GetMapping("/getUserByName/{name}")public User getUserByName(@PathVariable String name){log.info("name={}",name);return new User("王渝",22);}
}

2.4.开启client

@EnableEurekaClient //可以不加

3.consumer服务使用方

3.1.依赖

<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-openfeign</artifactId>
</dependency>

3.2.配置

server:port: 9090spring:application:name: service-consumereureka:client:service-url: #注册中心向外暴露的地址defaultZone: http://root:root@localhost:8761/eureka/ #,http://localhost:8762/eureka/  多台server已逗号分隔register-with-eureka: falseregistry-fetch-interval-seconds: 10 #表示EurekaClient间隔多久去拉去注册信息 默认30秒

3.3.Controller接口

@RestController
@RequestMapping("/user")
public class UserController {@Autowiredprivate UserServiceFeign userServiceFeign;@GetMapping("/name2/{name}")public User getUserByName2(@PathVariable String name){return  userServiceFeign.getUserName(name);}
}

3.4.Service接口（方法一 feign调用）

//service-provide为服务提供方的名称
@FeignClient(value = "service-provider") 
public interface UserServiceFeign {// /user/getUserByName/{name} 为消息提供方的url@GetMapping("/user/getUserByName/{name}") User getUserName(@PathVariable(value = "name") String name);}

3.5Service接口（方法二 RestTemplate）

@Service
public class UserServiceImpl implements UserService {@Autowiredprivate RestTemplate restTemplate;@Overridepublic User getUserByName(String name) {ResponseEntity<User> response = restTemplate.exchange("http://service-provider/user/getUserByName/" + name,HttpMethod.GET,null,new ParameterizedTypeReference<User>() {});return response.getBody();}
}