springboot后台使用openfeign调用其他微服务接口_@component的类可以被其他微服务调用吗

第一步：在porm中引入openfeign依赖

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
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第二步：创建外部服务接口类，添加注解和添加外部接口方法

@Component
@FeignClient(value = "identity")
//value中的值为对应微服务的服务名
public interface DockingClient {

    @PostMapping("/docking/modelTree/{modelId}")
    Result<?> getModelTree(@PathVariable(value = "modelId") String modelId);

    @PostMapping("/identityManage/allIdentities")
    //括号内是外部服务的接口地址
    Result<?> getAllIdentities();
}
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第三步：调用该接口获取外部接口数据

@Resource
private DockingClient dockingClient;

@Override
    public Result<?> getNumber(Integer stuNum,Integer lessonsNum) {
        Result<?> allIdentities=dockingClient.getAllIdentities();
        log.info("allIdentities:[{}]", allIdentities);
        if (!allIdentities.isSuccess()) {
            log.error(allIdentities.getMessage());
            throw new ErpException(allIdentities.getMessage());
        }
        int identityNum=Integer.parseInt(String.valueOf(((Map<String, Object>) allIdentities.getResult()).get("total")));
        Map<String,Integer> map = new HashMap<String, Integer>();
        map.put("identityNum",identityNum);
        map.put("lessonsNum",lessonsNum);
        map.put("studentNum",stuNum);
        return Result.OK(map);
    }

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