Spring|Spring Cloud Alibaba 使用Feign进行服务消费 SpringCloudAlibaba使用Feign进行服务

为什么使用Feign？ Feign可以把Rest的请求进行隐藏，伪装成类似SpringMVC的Controller一样。你不用再自己拼接url，拼接参数等等操作，一切都交给Feign去做。
使用Feign进行消费 【Spring|Spring Cloud Alibaba 使用Feign进行服务消费】将需要使用feign的工程增加一下依赖
pom.xml

org.springframework.cloud spring-cloud-starter-openfeign

启动类增加启用feign注解EnableFeignClients
UserServiceApplication.java

/** * 用户中心服务启动类 * * @author wentao.wu */ @EnableDiscoveryClient//服务注册 @EnableFeignClients//服务发现 @SpringBootApplication public class UserServiceApplication { public static void main(String[] args) { SpringApplication.run(UserServiceApplication.class, args); } }

创建feign调用接口

/** * service-member服务远程调用接口 * @author wentao.wu */ @FeignClient(name = "service-member") public interface MemberInfoControllerClient { /** * 通过用户名称获取会员信息 * @param username * @return */ @GetMapping("/member/info/getUserMember/{username}") public Response getUserMember(@PathVariable("username") String username); }

创建请求进行feign消费
FeignConsumerController.java

import com.gitee.eample.user.service.feign.MemberInfoControllerClient; import com.gtiee.example.common.exception.Response; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.HashMap; import java.util.Map; /** * Feign template consumer * * @author wentao.wu */ @RestController @RequestMapping("/feign/consumer") public class FeignConsumerController { @Autowired private MemberInfoControllerClient client; @GetMapping("/getUserInfo/{username}") public Response getUserInfo(@PathVariable("username") String username) { Response response = client.getUserMember(username); Map userinfo = new HashMap<>(); userinfo.put("userage", "100"); userinfo.put("email", "xxx@email.com"); response.getResult().putAll(userinfo); response.setMsg("获取用户信息成功!"); return response; } }

以上代码通过Feign生命消费者接口方法，Feign将自动生成代理方法进行远程调用。访问请求http://localhost:8080/feign/consumer/getUserInfo/zhangsan 进行消费返回结果为

{ "code": "1", "msg": "获取用户信息成功!", "errorCode": null, "errorMsg": null, "result": { "level": "vip1", "username": "zhangsan", "userage": "100", "email": "xxx@email.com" } }

源码代码存放地址 gitee: https://gitee.com/SimpleWu/spring-cloud-alibaba-example.git
cnblogs: https://www.cnblogs.com/SimpleWu
持续更新目录:https://www.cnblogs.com/SimpleWu/p/15476427.html