我的中软国际线上学习日志16-springcloud

zr-consumer
1、UserClient.java

package com.zr.client;

import com.zr.pojo.User;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@FeignClient(value = "zr-provider",fallback = UserClientFallback.class)
public interface UserClient {

    @RequestMapping("user/{id}")
    User queryById(@PathVariable("id")Long id);
}

2、UserClientFailback.java

package com.zr.client;

import com.zr.pojo.User;
import org.springframework.stereotype.Component;

@Component
public class UserClientFallback implements UserClient{

    @Override
    public User queryById(Long id) {
        User user=new User();
        user.setUsername("失败啦。。。。");
        return user;
    }
}

3、UserController.java

package com.zr.controller;

import com.netflix.hystrix.contrib.javanica.annotation.DefaultProperties;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.zr.client.UserClient;
import com.zr.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.client.RestTemplate;

import java.util.List;

@Controller
@RequestMapping("consumer/user")
@DefaultProperties(defaultFallback = "fallBackMethod")
public class UserController {

    /*@Autowired
    public RestTemplate restTemplate;

    @Autowired
    private DiscoveryClient discoveryClient;*/

    @Autowired
    private UserClient userClient;

    @RequestMapping("{id}")
    @ResponseBody
   // @HystrixCommand
    public String queryById(@PathVariable Long id){
       /* User user=restTemplate.getForObject("http://localhost:8081/user/"+id,User.class);*/
        /*List<ServiceInstance> instances = discoveryClient.getInstances("zr-provider");
        ServiceInstance instance = instances.get(1);
        User user=restTemplate.getForObject("http://localhost:"+instance.getPort()+"/user/"+id,User.class);
        return user.toString();*/
        User user = userClient.queryById(id);
        return user.toString();

    }

   /* public String fallBackMethod(){
        return "请求反面，请以后再尝试！！";
    }*/
}

4、application.yml

server:
  port: 8082
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10086/eureka
spring:
  application:
    name: zr-consumer
feign:
  hystrix:
    enabled: true

zr-provoder

1、UserController.java

package com.zr.controller;

import com.zr.pojo.User;
import com.zr.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("user")
public class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping("{id}")
    public User queryById(@PathVariable("id")Long id){
        return  userService.queryById(id);
    }
}

2、UserService.java

package com.zr.service;

import com.zr.dao.UserDao;
import com.zr.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService {

    @Autowired
    private UserDao userDao;

    public User queryById(Long id){
        return userDao.selectByPrimaryKey(id);
    }
}

4、application.yml

server:
  port: 8081
spring:
  datasource:
    url: jdbc:mysql://localhost:3306/springcloud
    username: root
    password: 123456
  application:
    name: zr-provider
mybatis:
  type-aliases-package: com.zr.pojo
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10086/eureka

本文地址：https://blog.csdn.net/weixin_42423962/article/details/107383276