springcloud之Feign初识篇—实例

墨蓝 2023-07-16 03:43 7阅读 0赞

1、pom添加依赖【服务消费者】

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

2、启动类添加启用注解

@SpringBootApplication
    @EnableFeignClients
    public class RibbonFeignApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(RibbonFeignApplication.class, args);
        }
    
    }

3、创建调用接口

import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.cloud.openfeign.FeignClientsConfiguration;
    import org.springframework.web.bind.annotation.RequestBody;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    
    import java.util.Map;
    
    /**
     * FeignClientsConfiguration：feign的默认配置类
     * name：调用的服务名
    @FeignClient(name = "test1",configuration = FeignClientsConfiguration.class)
    public interface FeignTest1Service {
        //被调用的服务请求路径 == http://test1/ribbonTest
        @RequestMapping(value = "/ribbonTest",method = RequestMethod.POST)
        public String testFeign(@RequestBody Map<String,String> map);
    }

4、调用测试

import com.example.springcloud.ribbonfeign.service.FeignTest1Service;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.util.HashMap;
    import java.util.Map;
    
    
    @RestController
    public class SingleFeignController {
    
        @Autowired
        private FeignTest1Service feignTest1Service;
    
        @RequestMapping("/singleFeign")
        public String singleFeign(){
            Map<String,String> map = new HashMap<String,String>(){
       {
                put("name","ribboon-openFeign");
            }};
            String result = feignTest1Service.testFeign(map);
            return result;
        }
    }