主要由三个文件组成

DynamicService.java

DynamicFeignClientFactory.java

DynamicClient.java

代码

package org.jeecg.modules.cloud.feign;import org.springframework.cloud.openfeign.SpringQueryMap;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;/*** Description: 通用接口,里面定义通用方法* 注意: 由于服务生产者所有的接口的返回值都是json格式的字符串,* 所以这里的通用接口的返回值最好使用String类型!!!*/
public interface DynamicService {/*** post方法对应的方法** @param url    服务生产者Handler方法请求映射地址* @param params 服务生产者Handler方法参数* @return*/@PostMapping(value = "{url}")String executePostRequest(@PathVariable("url") String url, @RequestBody Object params);@GetMapping(value = "{url}")String executeGetRequest(@PathVariable("url") String url, @SpringQueryMap Object params);
}

package org.jeecg.modules.cloud.feign;import org.springframework.cloud.openfeign.FeignClientBuilder;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;/*** Description: FeignClient工厂类,根据服务名称创建FeignClient对象(代理对象)*/
@Component
public class DynamicFeignClientFactory <T>{private FeignClientBuilder feignClientBuilder;public DynamicFeignClientFactory(ApplicationContext applicationContext){this.feignClientBuilder = new FeignClientBuilder(applicationContext);}//动态生成feignClient对象(代理对象)public T getFeignClient(final Class<T> type,String ServiceID){return this.feignClientBuilder.forType(type,ServiceID).build();}
}

package org.jeecg.modules.cloud.feign;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;/** Description: 通过FeignClient工厂获取到的FeignClient对象通过指定的请求去调用生产者方法!*/
@Component
public class DynamicClient {@Autowiredprivate DynamicFeignClientFactory<DynamicService> dynamicDynamicFeignClientFactory;public Object executePostApi(String feignName, String url, Object params) {DynamicService dynamicService = dynamicDynamicFeignClientFactory.getFeignClient(DynamicService.class, feignName);return dynamicService.executePostRequest(url, params);}public Object executeGetApi(String feignName, String url, Object params) {DynamicService dynamicService = dynamicDynamicFeignClientFactory.getFeignClient(DynamicService.class, feignName);return dynamicService.executeGetRequest(url, params);}}

DynamicClient 提供了两个方法 get 和 post