如何使用Spring Cloud Gateway实现一个最简单的API网关示例

1. 创建第一个SpringBoot应用作为网关服务

# 服务器端口
server.port=8080# Spring Cloud Gateway 配置
spring.cloud.gateway.routes[0].id=demo1
spring.cloud.gateway.routes[0].uri=http://localhost:8081
spring.cloud.gateway.routes[0].predicates[0]=Path=/demo1spring.cloud.gateway.routes[1].id=demo2
spring.cloud.gateway.routes[1].uri=http://localhost:8082
spring.cloud.gateway.routes[1].predicates[0]=Path=/demo2

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

2. 创建第二个SpringBoot应用作为后端应用

server.port=8081

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><version>3.3.5</version>
</dependency>
<dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>3.0.3</version>
</dependency>

@RestController
@RequestMapping("/demo1")
public class Demo1Controller {@GetMapping()public String getInfo() {return "demo1 service is running";}
}

3. Demo2同理，只是端口为8082
4. 访问http://localhost:8080/demo1或者http://localhost:8080/demo2即可完成网关转发