前提:提供一個注冊中心,可以使用Eureka Server。供gateway轉發請求時獲取服務實例。
一、新建GateWay項目
1、引入maven依賴
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
2、在主類上啟用服務發現注冊注解 @EnableDiscoveryClient
3、配置文件application.yml內容如下:
# 注冊中心
eureka:
client:
service-url:
defaultZone: http://test:123456@localhost:9090/os/eureka/
fetch-registry: true
register-with-eureka: true
spring:
application:
name: gateway-service
cloud:
gateway:
discovery:
locator:
enabled: true
lower-case-service-id: true # 服務名小寫
routes:
- id: consumer-service #路由的ID,沒有固定規則但求唯一,建議配合服務名
uri: lb://consumer-service # 匹配后提供服務的路由地址,lb代表從注冊中心獲取服務,且以負載均衡方式轉發
predicates:
- Path=/consumer/** #斷言,路徑相匹配的進行路由
filters: # 加上StripPrefix=1,否則轉發到后端服務時會帶上consumer前綴
- StripPrefix=1
server:
port: 9999
# 暴露監控端點
management:
endpoints:
web:
exposure:
include: "*"
endpoint:
health:
show-details: always
二、新建服務提供者項目ConsumerService
1、引入maven依賴
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
2、在主類上啟用服務發現注冊注解 @EnableDiscoveryClient
3、application.yml內容如下:
server:
port: 9700
spring:
application:
name: consumer-service
eureka:
client:
service-url:
defaultZone: http://test:123456@localhost:9090/os/eureka/
fetch-registry: true
register-with-eureka: true
4、新建 IndexController ,添加一個 hello 方法,傳入name參數,訪問后返回 hi + name 字符串
@RestController
public class IndexController { @RequestMapping("/hello") public String hello(String name){ return "hi " + name; } }
5、啟動eureka、gateway、consumerservice,gateway和consumerservice都注冊在eureka了。

通過網關訪問consumer-service的hello方法,http://localhost:9999/consumer/hello?name=zy ,效果如下,說明請求已經轉發到consumer-service服務上了。
