gateway网关.md · 客官不要跑/Typora

要将gateway也引入到nacos中

## 引入依赖

```xml

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

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
```

## yml

```yml
server:
  port: 9527

spring:
  application:
    name: gateway
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
    gateway:
      routes:
        - id: oss_service //唯一id
          uri: http://localhost:8092 #访问的路径
          predicates:
            - Path=/ossService/**    #判断路径是否相同，true可以访问
        - id: edu_service
          uri: http://localhost:8093
          predicates:
          - Path=/eduService/**

management:
  endpoints:
    web:
      exposure:
        include: "*"
```

## 主启动类

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

## 配置类（跨域问题）

```Java
@Configuration
public class CorsConfig {

@Bean
    public CorsWebFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        config.addAllowedMethod("*");
        config.addAllowedOrigin("*");
        config.addAllowedHeader("*");
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
        source.registerCorsConfiguration("/**", config);
        return new CorsWebFilter(source);
    }
}
```

官网

[Spring Cloud Gateway](https://docs.spring.io/spring-cloud-gateway/docs/3.0.4/reference/html/)

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