springcloud

约 400 字大约 1 分钟

2020-09-06

搭建

空maven项目
```
创建完成删除src
```

注册中心

Eureka注册中心

1.创建module
2.添加依赖 Eureka Discovery、Eureka Server
3.启动类添加 @EnableEurekaServer
4.配置yml
    server:
      port: 8801
    
    eureka:
      instance:
        hostname: localhost
      client:
        registerWithEureka: false
        fetchRegistry: false
        serviceUrl:
          defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
5.测试 localhost:8801

Zookeeper注册中心

服务提供

rest+ribbon

1.创建module
2.添加依赖 Eureka Discovery、Eureka Server、Ribbon
3.启动类添加 
   @SpringBootApplication
   @EnableDiscoveryClient
   @ComponentScan
   public class RibbonConsumerApplication {
       public static void main(String[] args) {
           SpringApplication.run(RibbonConsumerApplication.class, args);
       }
       @Bean
       @Autowired
       @LoadBalanced
       RestTemplate getRestTemplate() {
           return new RestTemplate();
       }
   }
4.创建测试服务
   @Service
   public class HelloService {
       public String sayHello(){
           return "helloWorld"; // 提供一个hello World
       }
   }
   @RestController
   public class HelloController {
       @Autowired
       private HelloService helloService;
       @GetMapping("/hello")
       public String sayHello(String name){
           return helloService.sayHello() + " " + name;
       }
   }
5. 配置yml
    eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8801/eureka/
    server:
      port: 8802
    spring:
      application:
        name: ribbon-provider
6.测试 localhost:8802/hello?name=zhangtaifeng

服务消费

rest+ribbon消费

@Service
public class HelloService {
    @Autowired
    RestTemplate restTemplate;
    public String sayHello(){
        return restTemplate.getForObject("http://ribbon-provider/hello?name=jc2", String.class);
    }
}

Feign消费

1.创建module
    2.添加依赖 Eureka Discovery、Eureka Server、Feign
    3.启动类添加 
       注册服务 -- @EnableDiscoveryClient
       注入Fegin -- @EnableFeignClients
    4.创建测试服务
       @FeignClient(value = "ribbon-consumer")
       public interface GetHello {
           @RequestMapping(value = "/hello?name=feign", method = RequestMethod.GET)
           public String sayHello();
       }
       @Service
       public class HelloService {
           @Autowired
           GetHello getHello;
           public String sayHello(){
               return getHello.sayHello();
           }
       }
       @RestController
       public class HelloController {
           @Autowired
           private HelloService helloService;
           @GetMapping("/hello")
           public String sayHello(String name){
               return helloService.sayHello() + " " + name;
           }
       }
    5. 配置yml
        eureka:
          client:
            serviceUrl:
              defaultZone: http://localhost:8801/eureka/
        server:
          port: 8802
        spring:
          application:
            name: ribbon-provider
    6.测试 localhost:8802/hello?name=zhangtaifeng

说明
服务发现Eureka
云端负载Ribbon
HTTP客户端Feign
熔断器Hystrix
动态路由Zuul
消息总线Spring Cloud Bus
日志收集Spring Cloud Sleuth
安全工具包Spring Cloud OAuth2