详解spring cloud构建微服务架构的网关(API GateWay)

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

@SpringBootApplication 
@EnableZuulProxy // 使用@EnableZuulProxy来开启Zuul的支持，如果你不想使用Zuul提供的Filter和反向代理的功能的话，此处可以使用@EnableZuulServer注解 
public class ZuulApplication { 
 public static void main(String[] args) { 
  SpringApplication.run(ZuulApplication.class, args); 
 } 
} 

spring: 
 application: 
  name: gateway-zuul # 应用名 
server: 
 port: 8768 #Zuul Server的端口号 
eureka: 
 client: 
  service-url: 
   defaultZone: http://localhost:8761/eureka 
 instance: 
  prefer-ip-address: true 

# 路由配置方式一 
#zuul: 
# routes: 
#  springboot-rest-template-feign: /templateservice/** #所有请求springboot-rest-template-feign的请求，都会被拦截，并且转发到templateservice上 
 
 
# 路由配置方式二 
zuul: 
 routes: 
  api-contract: # 其中api-contract是路由名称，可以随便定义，但是path和service-id需要一一对应 
   path: /templateservice/** 
   service-id: springboot-rest-template-feign # springboot-rest-template-feign为注册到Eureka上的服务名 
ribbon: 
 NFLoadBalancerRuleClassName: com.netflix.loadbalancer.RoundRobinRule # 配置服务端负载均衡策略