接口:
package cn.mn.app.service;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@FeignClient(name="sc-provider")
public interface IGoodsClient {
@RequestMapping(value = "/goods/query",method = RequestMethod.GET)
String query();
}
controller
package cn.mn.app.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import cn.mn.app.service.IGoodsClient;
@RestController
@RequestMapping("/goods")
public class GoodsController {
@Autowired
private IGoodsClient goodsClient;
@GetMapping("/q")
public String query(){
return goodsClient.query();
}
}
这里把接口直接注入。
启动类:
package cn.mn.app.application;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.feign.EnableFeignClients;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication(scanBasePackages = { "cn.mn.app.controller" })
@EnableDiscoveryClient
@EnableFeignClients
public class App
{
public static void main( String[] args )
{
SpringApplication.run(App.class, args);
}
// @LoadBalanced
// @Bean
// RestTemplate restTemplate(){
// return new RestTemplate();
// }
}
启动报错,无法注入IGoodsClient。
原因是没有使用@EnableFeignClients扫描指定包。修改启动类
package cn.mn.app.application;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.feign.EnableFeignClients;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication(scanBasePackages = { "cn.mn.app.controller" })
@EnableDiscoveryClient
@EnableFeignClients("cn.mn.app.service")
public class App
{
public static void main( String[] args )
{
SpringApplication.run(App.class, args);
}
// @LoadBalanced
// @Bean
// RestTemplate restTemplate(){
// return new RestTemplate();
// }
}
正常。