spring boot 2.0 Feign的客户端

时间：2022-07-24 15:14:50

1.pom.xml

<dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-openfeign</artifactId>

            <version>2.0..RELEASE</version>

        </dependency>

2.UserConsumerDemoApplication.java

@EnableFeignClients

3.UserClient.java

package cn.itcast.user.client;

import cn.itcast.user.pojo.User;

import org.springframework.cloud.openfeign.FeignClient;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.PathVariable;

@FeignClient("user-service")

public interface UserClient {

    @GetMapping("{id}")

    User getUserQueryInfo(@PathVariable("id") Long id);

}

4.UserFController.java

package cn.itcast.user.controller;

import cn.itcast.user.client.UserClient;

import cn.itcast.user.pojo.User;

import com.netflix.hystrix.contrib.javanica.annotation.DefaultProperties;

import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;

import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;

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 org.springframework.web.client.RestTemplate;

@RestController

@RequestMapping("consumerF")

@DefaultProperties(defaultFallback = "queryUserByIdFallback")

public class UserFController {

    @Autowired

    private UserClient userClient;

    @GetMapping("{id}")

    public User queryUserById(@PathVariable("id") Long id){

        return userClient.getUserQueryInfo(id);

    }

    public String queryUserByIdFallback(){

        return "用户信息查询出现异常！";

    }

}

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