简单实践 spring clound 使用openfeign

1.概要

这是在前面工程基础上的一个变更。

前工程：检查实验 spring cloud nacos nacos-server-2.3.0-优快云博客

2 代码

2.1 引入依赖

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

2.2 主函数开启 openfeign

@EnableFeignClients

 2.3 添加接口

package com.xjc.springcloundtest;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@FeignClient(value = "server3")
public interface FenTest {
    @RequestMapping("/fun")
    String fun();

    @RequestMapping("/fun/{pid}")
    String fun2(@PathVariable Integer pid);
}

 2.3 添加接口，并调用

package com.xjc.springcloundtest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;
import java.util.Random;

@RestController
public class TestController2 {

    @Autowired
    FenTest fenTest;

    @RequestMapping("/fun2")
    public String fun2(){
        String ret = fenTest.fun();
        return "函数2"+ret;
    }
}

3 运行效果