Java微服务间接口调用 feign

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

//服务A的启动类
 
@EnableDiscoveryClient  //nacos注册
@EnableFeignClients     //Feign 服务调用
@SpringBootApplication
public class ApplicationA {
    public static void main(String[] args){
        SpringApplication.run(ApplicationA.class,args);
    }
}
 
//服务B的启动类
 
@EnableDiscoveryClient  //nacos注册
@EnableFeignClients     //Feign 服务调用
@SpringBootApplication
public class ApplicationB {
    public static void main(String[] args){
        SpringApplication.run(ApplicationB.class,args);
    }
}

服务A配置
# 服务端口
server.port=8001
# 服务名
spring.application.name=serviceA
 
# nacos服务地址
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
 
--------------------------服务B配置-------------------------------
# 服务端口
server.port=8003
# 服务名
spring.application.name=serviceB
 
# nacos服务地址
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

@Component
@FeignClient(value = "sso", path = "/api/user", fallback = UserClientHystrix.class)//value是需要调用的服务名称，path是sso服务内的请求路径
//value必选是服务名(就是yaml中server.name)
//path是前缀(就是yaml中server.contentPath)
//fallback是服务熔断的类
public interface UserClient {
 
    /**
     * 获取对象集合
     * @param object
     * @return
     */
    @PostMapping("/findList")//根据服务适配添加注解
    Result<UserDO> findList(@CustomJSONBody Object object);
}
//@FeignClient注解用于指定从哪个服务中调用功能 ，名称与被调用的服务名保持一致。

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

服务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);
    }
}