SpringCloud整合Feign

此处整合Feign,使用feign实现服务调用！这里只是配置简单使用，后续会更新服务降级内容！ 1、引入依赖

<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> <version>2.1.1.RELEASE</version> </dependency>

创建feign接口：

package org.rosefinch.business.core; import java.util.List; import java.util.Map; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import com.mythical.rosefinch.entity.bean.User; //name 名称随意 //url是调用服务地址rosefinch-business 配置在host文件中 //RequestMapping 调用服务的请求方法 @FeignClient(name = "rosefinch-business", url = "http://rosefinch-business:8081") public interface UserClient { /* @GetMapping("/user/getAllUser") */ @RequestMapping("/user/getAllUser") public List<User> getUser(@RequestParam Map<String, Object> paramMap); }

B服务方法创建

package com.mythical.rosefinch.business.service; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.transaction.annotation.Transactional; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import com.mythical.rosefinch.business.mapper.UserMapper; import com.mythical.rosefinch.entity.bean.User; @RestController @RequestMapping("/user") @Transactional public class UserService { @Autowired private UserMapper userMapper; @RequestMapping("/getAllUser") public List<User> getAllUser(){ return userMapper.getAllUser(); } }

A服务调用B服务 创建A服务：

package com.mythical.rosefinch.web.controller; import java.util.HashMap; import java.util.List; import java.util.Map; import org.rosefinch.business.core.UserClient; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import com.mythical.rosefinch.entity.bean.User; @RestController @RequestMapping("/user") public class UserController { @Autowired private UserClient userClient; @RequestMapping("/getAllUser") public List<User> getAllUser() { Map<String, Object> m = new HashMap<String, Object>(); return userClient.getUser(m); } }

A中启动类要注意：

//@EnableFeignClients("org.rosefinch.business.core") 此处要注意UserClient要注册到Spring容器中，否则会报错，因为我的core是一个jar包引入的所以用这样的方式注入 package com.mythical.rosefinch.web; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.openfeign.EnableFeignClients; @SpringBootApplication @EnableFeignClients("org.rosefinch.business.core") public class RosefinchWebApplication { public static void main(String[] args) { SpringApplication.run(RosefinchWebApplication.class, args); } }