（3）微服务之间项目调用

采用RestTemplate方式调用：
（1）添加RestTemplate到Spring容器中：

import org.springframework.beans.factory.annotation.Configurable;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

/**
 * Created by lj on 2020/4/26.
 */
@Configuration
public class RestConfiguration {

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

（2）使用：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.util.Random;

/**
 * Created by lj on 2020/4/25.
 */

@RestController
@RequestMapping(value = "/User",produces = "application/json;charest=UTF-8")
public class UserController {

    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping(value = "/getUserInfo/{id}")
    public String getUserInfo(@PathVariable("id") Integer id){
        return  id+"：用户信息返回成功";
    }


    @RequestMapping(value = "/getOrderByID/{id}")
    public String getOrderByID(@PathVariable("id") Integer id){
        Random random = new Random();
        //com-eureka-client001为spring的服务名
        String result = restTemplate.getForObject("http://com-eureka-client001/Order/getOrderInfo/"+random.nextInt(100),String.class);
        //String result = restTemplate.getForObject("http://127.0.0.1:8088/Order/getOrderInfo/"+random.nextInt(100),String.class);
        return  result;
    }
}