spring cloud feign 服务间调用

亦凉 2022-02-20 01:39 289阅读 0赞

### 1.pom.xml依赖 ###

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-feign</artifactId>
                <version>1.4.0.RELEASE</version>
            </dependency>

### 2.服务启动类添加@EnableFeignClients注解 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hlbnVfeGlhb2hlaQ_size_16_color_FFFFFF_t_70]

### 3.添加FeignService.java接口 ###

@FeignClient(name = "xxx-service", fallback = XxxFeignFallBack.class)
    public interface XxxFeignService {
        @PostMapping("/aaa/bbb")
        String test(@RequestBody Object obj);
    }

name：微服务的名称，一定要以eureka后台配置的保持一致。  
fallback：标记容错后执行的类

### 4.添加服务调用异常时，服务降级调用的FeignFallBack.java异常处理类 ###

@Component
    public class XxxFeignFallBack implements XxxFeignService {
        @Override
        public String test(Object obj) {
            System.err.println("调用出错！");
            //异常处理
            return "";
        }
    }

### 5.服务间接口调用时采用注入的方式调用FeignService.java中的接口即可 ###

@Autowired
        private XxxFeignService xxxFeignService;
        
        public void test() {
    		xxxFeignService.test();
    	}

##### 参考链接： #####

[https://www.cnblogs.com/huangjuncong/p/9053576.html][https_www.cnblogs.com_huangjuncong_p_9053576.html]  
[https://blog.csdn.net/u010066934/article/details/80967709][https_blog.csdn.net_u010066934_article_details_80967709]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hlbnVfeGlhb2hlaQ_size_16_color_FFFFFF_t_70]: /images/20220220/345734db512c481880f7717c6c35ee8b.png
[https_www.cnblogs.com_huangjuncong_p_9053576.html]: https://www.cnblogs.com/huangjuncong/p/9053576.html
[https_blog.csdn.net_u010066934_article_details_80967709]: https://blog.csdn.net/u010066934/article/details/80967709