服务消费方式

1-使用RestTemplate

@Slf4j
@RestController
public class TestController {
    @Autowired
    RestTemplate restTemplate;

    @GetMapping("/test")
    public String test() {
        String result = restTemplate.getForObject("http://nacos-producer/hello?name=ChadJ", String.class);
        return "Return : " + result;
    }
}

@Bean
@LoadBalanced
public RestTemplate restTemplate() {
    return new RestTemplate();
}

利用@LoadBalanced在调用接口的时候拦截下来，然后进行负载均衡调用。

2-使用WebClient

@Slf4j
@RestController
public class TestController {

    @Autowired
    private WebClient.Builder webClientBuilder;

    @GetMapping("/test")
    public Mono<String> test() {
        Mono<String> result = webClientBuilder.build()
                .get()
                .uri("http://alibaba-nacos-discovery-server/hello?name=didi")
                .retrieve()
                .bodyToMono(String.class);
        return result;
    }
}

@Bean
@LoadBalanced
public WebClient.Builder loadBalancedWebClientBuilder() {
    return WebClient.builder();
}

3-使用Feign

1. 引入依赖

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

2.主类@EnableFeignClients

3.定义Fegin客户端和使用Fegin客户端

@Slf4j
@RestController
public class TestController {
    @Autowired
    Client client;

    @GetMapping("/test")
    public String test() {
        String result = client.hello("didi");
        return "Return : " + result;
    }
}

@FeignClient("alibaba-nacos-discovery-server")
interface Client {
    @GetMapping("/hello")
    String hello(@RequestParam(name = "name") String name);
}