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使用nacos作为注册中心来搭建spring-cloud-openfeign的简单demo

米小格儿 2022-07-13 阅读 104
springmavenide编程语言


文章目录

  • ​​1.启动nacos​​
  • ​​2.服务端项目搭建 [demo-spring-cloud-openfeign-provider]​​
  • ​​2.1.源码​​
  • ​​2.2.pom.xml​​
  • ​​2.3.配置文件：application.yml​​
  • ​​2.4.创建后端服务:OpenfeiginProviderClient​​
  • ​​2.5.创建启动类：OpenfeignProviderApp​​
  • ​​2.6.启动后验证:服务验证/say/{message}​​
  • ​​3.客户端项目搭建 [demo-spring-cloud-openfeign-consumer]​​
  • ​​3.1.源码​​
  • ​​3.2.pom.xml​​
  • ​​3.3.配置文件：application.yml​​
  • ​​3.4.创建调用后端provider服务的service:OpenfeignConsumerService​​
  • ​​3.5.创建客户端入口类：OpenfeignConsumerClient​​
  • ​​3.6.创建启动类:OpenfeignConsumerApp​​
  • ​​3.7.nacos注册中心​​
  • ​​3.8.启动验证​​

1.启动nacos

1.不在赘述，可以参考下面的安装启动地址

​

2.服务端项目搭建 [demo-spring-cloud-openfeign-provider]

2.1.源码

https://gitee.com/gaoxinfu_admin/demo-spring-cloud/tree/master/demo-spring-cloud-openfeign-provider

2.2.pom.xml

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>spring-boot-starter-parent</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>2.2.5.RELEASE</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.gaoxinfu.demo.spring.cloud.openfeign</groupId>
    <artifactId>demo-spring-cloud-openfeign-provider</artifactId>
    <version>1.0-SNAPSHOT</version>

    <name>demo-spring-cloud-openfeign-provider</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>

        <!--web项目-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--nacos服务发现与注册-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>0.2.2.RELEASE</version>
        </dependency>


        <!--openfeign-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.2.2.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

重点截图

使用nacos作为注册中心来搭建spring-cloud-openfeign的简单demo_maven


使用nacos作为注册中心来搭建spring-cloud-openfeign的简单demo_maven_02

2.3.配置文件：application.yml

server:
  port: 8079
spring:
  application:
    name: openfeign-provider
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

2.4.创建后端服务:OpenfeiginProviderClient

package com.gaoxinfu.demo.spring.cloud.openfeign;

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

/**
 * @Description:
 * @Author: gaoxinfu
 * @Date: 2020-10-27 17:40
 */

@RestController
public class OpenfeiginProviderClient {

    @RequestMapping(value = "/say/{message}",method = RequestMethod.GET)
    public String say(@PathVariable String message){
        return "OpenfeiginProviderClient = "+message;
    }
}

2.5.创建启动类：OpenfeignProviderApp

package com.gaoxinfu.demo.spring.cloud.openfeign;

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

/**
 * Hello world!
 *
 */
@SpringBootApplication
@EnableDiscoveryClient
public class OpenfeignProviderApp
{
    public static void main( String[] args )
    {
        SpringApplication.run(OpenfeignProviderApp.class,args);
    }
}

2.6.启动后验证:服务验证/say/{message}

http://127.0.0.1:8079/say/gaoxinfu

使用nacos作为注册中心来搭建spring-cloud-openfeign的简单demo_maven_03

3.客户端项目搭建 [demo-spring-cloud-openfeign-consumer]

3.1.源码

​​https://gitee.com/gaoxinfu_admin/demo-spring-cloud/tree/master/demo-spring-cloud-openfeign-consumer​​

3.2.pom.xml

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>spring-boot-starter-parent</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>2.2.5.RELEASE</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.gaoxinfu.demo.spring.cloud.openfeign</groupId>
    <artifactId>demo-spring-cloud-openfeign-consumer</artifactId>
    <version>1.0-SNAPSHOT</version>

    <name>demo-spring-cloud-openfeign-consumer</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

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

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>0.2.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.2.2.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3.3.配置文件：application.yml

server:
  port: 8080
spring:
  application:
    name: openfeign-consumer
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

3.4.创建调用后端provider服务的service:OpenfeignConsumerService

package com.gaoxinfu.demo.spring.cloud.openfeign;

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

/**
 * @Description:
 * @Author: gaoxinfu
 * @Date: 2020-10-27 18:03
 */
@FeignClient("openfeign-provider")
public interface OpenfeignConsumerService {

    @RequestMapping(value="/say/{message}",method = RequestMethod.GET)
    String say(@PathVariable String message);

}

3.5.创建客户端入口类：OpenfeignConsumerClient

package com.gaoxinfu.demo.spring.cloud.openfeign;

import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;

/**
 * @Description:
 * @Author: gaoxinfu
 * @Date: 2020-10-27 18:02
 */
@RestController
public class OpenfeignConsumerClient {

    @Resource
    private OpenfeignConsumerService openfeignConsumerService;

    @RequestMapping(value = "/say/{message}",method = RequestMethod.GET)
    public String say(@PathVariable String message){
        return openfeignConsumerService.say(message);
    }

}

3.6.创建启动类:OpenfeignConsumerApp

package com.gaoxinfu.demo.spring.cloud.openfeign;

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

/**
 * Hello world!
 *
 */
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class OpenfeignConsumerApp
{
    public static void main( String[] args )
    {
        SpringApplication.run(OpenfeignConsumerApp.class,args);
    }
}

3.7.nacos注册中心

使用nacos作为注册中心来搭建spring-cloud-openfeign的简单demo_ide_04

3.8.启动验证

通过客户端，可以访问到服务端了

http://127.0.0.1:8080/say/gaoxinfu

使用nacos作为注册中心来搭建spring-cloud-openfeign的简单demo_ide_05


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