目录

1父工程依赖导入

2 创建提供者模块provider

2.1 继承父工程依赖

2.2 application.yml 

2.3编写Controller 

 3.创建消费者模块consumer

3.1 继承父工程依赖

3.2 application.yml 

3.3 消费者主启动类

3.4 消费者service

3.5 controller

4访问

1父工程依赖导入

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <spring-boot.version>2.4.1</spring-boot.version>
    <spring-cloud.version>2020.0.0</spring-cloud.version>
    <spring-cloud-alibaba.version>2021.1</spring-cloud-alibaba.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>com.alibaba.cloud</groupId>
      <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    </dependency>

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

    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
    </dependency>

  </dependencies>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-dependencies</artifactId>
        <version>${spring-boot.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>${spring-cloud.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
      <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-alibaba-dependencies</artifactId>
        <version>${spring-cloud-alibaba.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

2 创建提供者模块provider

2.1 继承父工程依赖

2.2 application.yml 

server:
  port: 8082
spring:
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
  application:
    name: cloud-provider

2.3编写Controller 

package com.wyy.co.controller;

import com.wyy.co.pojo.User;
import ma.glasnost.orika.MapperFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.Map;

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

  
    @RequestMapping("/{name}")
    public String test1(@PathVariable String name) {
        System.out.println("生成者接受参数："+name);
        return "ok";
    }

  
}

 3.创建消费者模块consumer

3.1 继承父工程依赖

3.2 application.yml 

server:
  port: 8081
spring:
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
  application:
    name: cloud-consumer

3.3 消费者主启动类

 @EnableFeignClients 开启Feign功能

package com.wyy.cp;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;


@EnableDiscoveryClient
@SpringBootApplication
@EnableFeignClients
public class CloudConsumerApplication {

    public static void main(String[] args) {
        SpringApplication.run(CloudConsumerApplication.class, args);
    }

}

3.4 消费者service

创建Server,并使用Feign表示其需要远程对接的服务名称,并使用@RequestMapping表示其映射的 路径

FeignClient接口,不能使用@GettingMapping之类的组合注解

FeignClient接口中，如果使用到@PathVariable必须指定其value
当使用feign传参数的时候,需要加上@RequestParam注解,否则对方服务无法识别参数 

package com.wyy.cp.service;

import com.wyy.wy.Dto.UserDto;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.Map;

@FeignClient("cloud-provider")
public interface UserService {

    @RequestMapping("/user/{name}")
    public String test1(@PathVariable(value = "name") String name) ;

   
}

3.5 controller

package com.wyy.cp.controller;

import com.wyy.cp.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("/a")
public class Usercontroller {
    @Autowired
    private UserService userService;

    @RequestMapping("/{name}")
    public String text(@PathVariable String name) {
        return userService.test1(name);
    }
}

4访问

消费者测试

 提供者模块打印