如何在Springboot中创建假的FeignClient？

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

@Component
public class FakeFeignClient implements TargetFeignClient {
    
    @Override
    public String fetchData() {
        // 这里可以自定义返回假数据的逻辑
        return "Fake Data";
    }
}

@Configuration
public class FeignClientConfig {
    
    @Bean
    @Primary
    public TargetFeignClient targetFeignClient() {
        return new FakeFeignClient();
    }
}

@FeignClient(name = "target-service", configuration = FeignClientConfig.class)
public interface TargetFeignClient {
    
    @GetMapping("/data")
    String fetchData();
}