springcloud报错-Ribbon整合Eureka，出现 No instances available for XXX 异常

RestTemplate注入有问题
新版的需要这样注入：
    @Bean
    @LoadBalanced
    RestOperations restTemplate(RestTemplateBuilder builder) {
        return builder.build();
    }

    @Autowired
    RestOperations restTemplate;

package com.csi.order;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestOperations;
import org.springframework.web.client.RestTemplate;

@SpringBootApplication
public class OrderApplication {
// 　 旧版不支持
//    @Bean
//    @LoadBalanced
//
//    public RestTemplate restTemplate(){
//        return new RestTemplate();
//    }

    @Bean
    @LoadBalanced
    RestOperations restTemplate(RestTemplateBuilder builder) {
        return builder.build();
    }

    public static void main(String[] args) {
        SpringApplication.run(OrderApplication.class,args);
    }
}

// controller 里

　　@Autowired
　　RestOperations restTemplate;