pom 文件
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
啓動類 注意 要加上 @EnableFeignClients
@SpringBootApplication
@EnableDiscoveryClient
@EnableEurekaClient
@EnableFeignClients
public class HelloService1Application {
public static void main(String[] args) {
SpringApplication.run(HelloService1Application.class, args);
}
}
feign調用接口
@FeignClient(name = "two",fallback = Test2ServiceFeign.class)
public interface Test2Service {
@RequestMapping(value = "/get1",method = RequestMethod.GET,produces= MediaType.APPLICATION_JSON_UTF8_VALUE)
String get1(@RequestParam("aa") String aa);//RequestParam
}
降級所用的集成feign接口的類
@Component
public class Test2ServiceFeign implements Test2Service {
@Override
public String get1(String aa) {
return "調用出錯";
}
}
配置文件中開啓 hystrix 高版本默認的關閉的,要開啓
feign:
hystrix:
enabled: true
controller類的調用
@RequestMapping("/get2")
public String getTwo(){
logger.info("tow---------------------------");
String aa ="aa";
String aa1 = service.get1(aa);
logger.info(aa1);
return "-------------4444444444----------------";
}
服務類的controller是
@RequestMapping("/get1")
public String getHello(String aa){
logger.info(aa);
logger.info("-------------------hello------2");
return "hello------------2";
}
所有的代碼稍後會上傳.
這幾篇代碼地址是:https://download.csdn.net/download/a863922230/11827197