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

//服務(wù)A的啟動(dòng)類
 
@EnableDiscoveryClient  //nacos注冊(cè)
@EnableFeignClients     //Feign 服務(wù)調(diào)用
@SpringBootApplication
public class ApplicationA {
    public static void main(String[] args){
        SpringApplication.run(ApplicationA.class,args);
    }
}
 
//服務(wù)B的啟動(dòng)類
 
@EnableDiscoveryClient  //nacos注冊(cè)
@EnableFeignClients     //Feign 服務(wù)調(diào)用
@SpringBootApplication
public class ApplicationB {
    public static void main(String[] args){
        SpringApplication.run(ApplicationB.class,args);
    }
}

服務(wù)A配置
# 服務(wù)端口
server.port=8001
# 服務(wù)名
spring.application.name=serviceA
 
# nacos服務(wù)地址
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
 
--------------------------服務(wù)B配置-------------------------------
# 服務(wù)端口
server.port=8003
# 服務(wù)名
spring.application.name=serviceB
 
# nacos服務(wù)地址
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

@Component
@FeignClient(value = "sso", path = "/api/user", fallback = UserClientHystrix.class)//value是需要調(diào)用的服務(wù)名稱，path是sso服務(wù)內(nèi)的請(qǐng)求路徑
//value必選是服務(wù)名(就是yaml中server.name)
//path是前綴(就是yaml中server.contentPath)
//fallback是服務(wù)熔斷的類
public interface UserClient {
 
    /**
     * 獲取對(duì)象集合
     * @param object
     * @return
     */
    @PostMapping("/findList")//根據(jù)服務(wù)適配添加注解
    Result<UserDO> findList(@CustomJSONBody Object object);
}
//@FeignClient注解用于指定從哪個(gè)服務(wù)中調(diào)用功能 ，名稱與被調(diào)用的服務(wù)名保持一致。

@Component
@FeignClient("serviceB")  
public interface ServiceBClient {   
    @PostMapping("serviceB/test")
    public Result test(@RequestParam String args);
}

服務(wù)B中接口的示例
 
@RestController
@RequestMapping("serviceB")
@CrossOrigin
public class VodController {
    
    @PostMapping("test")
    public void test(@RequestParam String args){
        System.out.println(args);
    }
}