1. 新建服务，pom文件
新建gateway-server服务，pom文件如下：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.12.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.test</groupId>
<artifactId>gateway-server</artifactId>
<version>1.0.0-SNAPSHOT</version>
<name>gateway-server</name>
<description>gateway网关服务</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud-alibaba.version>2.2.1.RELEASE</spring-cloud-alibaba.version>
<spring-cloud.version>Hoxton.SR9</spring-cloud.version>
</properties>
<dependencies>
<!-- 测试路由用的，
可访问 http://ip:port/actuator/gateway/routes
查看路由是否配置生效 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- Nacos注册和服务配置，网关也要放到nacos上的 -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!-- 后续关联sentinel用 -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<!-- 使用openfeign的 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
</dependency>
<!-- log4j2 -->
<!-- Spring Boot官方文档中解释，在启用spring-boot-starter后会默认使用logback作为日志框架， 本项目选用log4j2,因此需要全局exclude掉Spring
Boot默认日志 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring-cloud-alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<finalName>gateway-service</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
<!-- 编译打包跳过test -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
</plugins>
</build>
</project>
特别注意：
- Spring Cloud Gateway 不使用 Web 作为服务器，而是 使用 WebFlux 作为服务器，Gateway 项目已经依赖了
starter-webflux，所以这里 千万不要依赖starter-web - 由于过滤器等功能依然需要 Servlet 支持，故这里还需要依赖
javax.servlet:javax.servlet-api
2. 跨域配置
因为不是Web 作为服务器，和其他的稍有不同
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpHeaders;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.reactive.CorsWebFilter;
import org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource;
import org.springframework.web.reactive.config.CorsRegistry;
import org.springframework.web.reactive.config.WebFluxConfigurer;
/**
* 跨域配置
*/
@Configuration
public class CorsConfig implements WebFluxConfigurer
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowCredentials(true)
.allowedOrigins("*")
.allowedHeaders("*")
.allowedMethods("*")
.exposedHeaders(HttpHeaders.SET_COOKIE);
}
/**
* 跨域过滤器
* @return
*/
@Bean
public CorsWebFilter corsWebFilter() {
CorsConfiguration corsConfiguration = new CorsConfiguration();
corsConfiguration.setAllowCredentials(true);
corsConfiguration.addAllowedHeader("*");
corsConfiguration.addAllowedMethod("*");
corsConfiguration.addAllowedOrigin("*");
corsConfiguration.addExposedHeader(HttpHeaders.SET_COOKIE);
UrlBasedCorsConfigurationSource corsConfigurationSource = new UrlBasedCorsConfigurationSource();
corsConfigurationSource.registerCorsConfiguration("/**", corsConfiguration);
return new CorsWebFilter(corsConfigurationSource);
}
}
3. 启动文件添加@EnableFeignClients注解
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class GatewayServerApplication {
public static void main(String[] args) {
SpringApplication.run(GatewayServerApplication.class, args);
}
}
4. nacos中配置信息
# 1.server
server:
port: 10000
# 2.log
logging:
level:
org.springframework.cloud.gateway: info
# 3. openfeign
feign:
sentinel:
enabled: true
# 4. 为了监控网关
management:
endpoints:
web:
exposure:
include: "*"
# 5.spring
spring:
# 统一设置返回的时间格式
jackson:
date-format: yyyy-MM-dd HH:mm:ss
time-zone: GMT+8
default-property-inclusion: NON_NULL
cloud:
gateway:
discovery:
locator:
enabled: true
routes:
# 自定义路由 ID
- id: service-dict
# 采用 LoadBalanceClient 方式请求，以 lb:// 开头，后面的是注册在 Nacos 上的服务名
uri: lb://service-dict
# Predicate 翻译过来是“谓词”的意思，必须，主要作用是匹配用户的请求，有很多种用法
predicates:
# 路径匹配，以 api 开头，直接配置是不生效的，看 filters 配置
- Path=/api/dict/**
filters:
# 前缀过滤，默认配置下，我们的请求路径是 http://localhost:9000/myshop-service-consumer-item/** 这时会路由到指定的服务
# 此处配置去掉 1 个路径前缀，再配置上面的 Path=/api/**，就能按照 http://localhost:9000/api/** 的方式访问了
- StripPrefix=1
- id: service-file
uri: lb://service-file
predicates:
- Path=/api/file/**
filters:
- StripPrefix=1
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