springcloud微服务架构搭建入门笔记

• 注册管理服务器

  • 　　应用入口配置

 @SpringBootApplication
 @EnableEurekaServer
 public class GatewayApplication {
     public static void main(String[] args) {
         SpringApplication.run(GatewayApplication.class, args);
     }
 }

• • yml配置

 spring:
   application:
     name: gateway    #服务名称

 server:
   port: 8801    #端口

 eureka:
   instance:
     hostname: localhost
   client:
     registerWithEureka: false
     fetchRegistry: false
     serviceUrl:
       defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

• 业务服务器

  • 　　yml配置

 server:
   port: 8804

 spring:
   application:
     name: client-feign

 eureka:
   client:
     service-url:
       defaultZone:  http://localhost:8801/eureka/

• • 应用入口

 @SpringBootApplication
 @EnableEurekaClient    启动EurekaServer，用于将本服务注册到注册器上
 @EnableFeignClients    开启Feign客户端，用于访问注册器上的其他服务
 public class ClientFeignApplication {

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

 }

• • 外部服务请求客户端

 import org.springframework.cloud.openfeign.FeignClient;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.ResponseBody;

 @FeignClient("service")    #注册器中注册过的服务名，即其他服务yml中配置的spring.application.name
 public interface ClientForRibbon {
     @RequestMapping("/login")    #外部服务请求路径
     @ResponseBody
     String login(@RequestParam("name")String name, @RequestParam("passwd")String passwd);    #参数前需用注解注明参数名称
 }

• • 控制层

 import com.example.clientfeign.feign.ClientForRibbon;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;

 @RestController
 public class LoginController {

     @Autowired
     //注入其他服务客户端
     private ClientForRibbon server;

     @RequestMapping("/loginOut")
     public String loginOut(String name,String passwd){
         //利用客户端调用其他服务
         return server.login(name,passwd);
     }
 }

demo: https://github.com/malefeng/springcloudDemo.git