springcloud 使用Feign遇到的坑

问题一：无法添加spring-cloud-starter-feign依赖

• 解决办法：

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

问题二：编写@FeignClient接口出现请求方式错误，参数错误

• 解决办法

package com.example.eurekaconsumerclient.dao;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Component
@FeignClient("client-provider")
public interface TestClient {
    //必须使用@RequestMapping,不能使用@GetMapping
    //@PathVariable 必须指定参数名称
    @RequestMapping(method = RequestMethod.GET,value = "/test/{name}")
    String test(@PathVariable("name") String name);
}

问题三：在@FeignClient接口中，方法参数是复杂对象，即使指定请求格式为Get,Feign依然会以post方法进行发送请求，控制台报错

• 解决办法

package com.example.eurekaconsumerclient.dao;
import com.example.eurekaconsumerclient.pojo.User;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.*;

@Component
@FeignClient("client-provider")
public interface TestClient {
    //必须使用@RequestMapping,不能使用@GetMapping
    //@PathVariable 必须指定参数名称
    @RequestMapping(method = RequestMethod.GET,value = "/test/{name}")
    String test(@PathVariable("name") String name);
    /**
     * 错误写法
     * @param user User 对象
     * @return
     */
    @RequestMapping(method = RequestMethod.Get,value = "/test/")
    User findByUser(User user);
    /**
     * 正确写法
     * @param id    User->id属性
     * @param username   User->username属性
     * @return
     */
    @RequestMapping(method = RequestMethod.GET,value = "/test/")
    User findByUser(@RequestParam("id") Long id,@RequestParam("username") String username);
}