springboot 集成nacos openfeign

2023-12-17  本文已影响0人  define光年

基于nacos搭建的父项目、spring cloud nacos provider（服务提供者）、spring cloud nacos consumer（服务消费者）结构：

  1. 创建一个maven父项目。 maven父项目包含springcloudnacos-provider（服务提供者）、springcloudnacos-consumer（服务消费者）两个子模块。父模块下的src可以删除。

maven父项目的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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
<!--        <version>2.6.4</version>-->
        <version>2.2.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>springcloudnacos</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springcloudnacos</name>
    <description>Demo project for Spring Boot</description>
    <packaging>pom</packaging>
    <properties>
        <java.version>1.8</java.version>
        <spring-boot-dependencies.version>2.2.4.RELEASE</spring-boot-dependencies.version>
        <spring-cloud-dependencies.version>Hoxton.RELEASE</spring-cloud-dependencies.version>
        <spring-cloud-alibaba.version>2.2.0.RELEASE</spring-cloud-alibaba.version>
    </properties>
 
    <modules>
        <module>springcloudnacos-provider</module>
        <module>springcloudnacos-consumer</module>
    </modules>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
 
    </dependencies>
 
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
<!--                <version>Hoxton.RELEASE</version>-->
                <version>${spring-cloud-dependencies.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
<!--                <version>2.2.4.RELEASE</version>-->
                <version>${spring-boot-dependencies.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
<!--                <version>2.2.0.RELEASE</version>-->
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
 
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <testFailureIgnore>true</testFailureIgnore>
                </configuration>
            </plugin>
        </plugins>
    </build>
 
</project>
  1. 服务提供者：springcloudnacos-provider

（1）spring cloud nacos provider项目的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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
<!--    <parent>-->
<!--        <groupId>org.springframework.boot</groupId>-->
<!--        <artifactId>spring-boot-starter-parent</artifactId>-->
<!--        <version>2.7.0</version>-->
<!--        <relativePath/> &lt;!&ndash; lookup parent from repository &ndash;&gt;-->
<!--    </parent>-->
    <parent>
        <groupId>com.example</groupId>
        <artifactId>springcloudnacos</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
 
    <groupId>com.example</groupId>
    <artifactId>springcloudnacos-provider</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springcloudnacos-provider</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
 
        <!-- nacos注册中心-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!-- nacos配置中心-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
        
    </dependencies>
 
    <build>
        <plugins>
 
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <testFailureIgnore>true</testFailureIgnore>
                </configuration>
            </plugin>
        </plugins>
    </build>
 
 
 
</project>

（2）spring cloud nacos provider服务的启动类

package com.example.springcloudnacosprovider;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
 
@SpringBootApplication
@EnableDiscoveryClient
public class SpringcloudnacosProviderApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(SpringcloudnacosProviderApplication.class, args);
    }
 
}

（3）spring cloud nacos provider服务的yml配置

spring:
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
  application:
    name: nacos-provider
server:
  port: 8090

（4）spring cloud nacos provider服务的测试类

package com.example.springcloudnacosprovider.controller;
 
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
public class NacosProviderController {
 
    @RequestMapping("/testNacosProvider")
    public String testNacosProvider(){
        return "this is my nacos provider！";
    }
 
 
}
  1. 服务消费者：springcloudnacos-consumer

（1）spring cloud nacos consumer服务的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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
<!--    <parent>-->
<!--        <groupId>org.springframework.boot</groupId>-->
<!--        <artifactId>spring-boot-starter-parent</artifactId>-->
<!--        <version>2.7.0</version>-->
<!--        <relativePath/> &lt;!&ndash; lookup parent from repository &ndash;&gt;-->
<!--    </parent>-->
    <parent>
        <groupId>com.example</groupId>
        <artifactId>springcloudnacos</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
 
    <groupId>com.example</groupId>
    <artifactId>springcloudnacos-consumer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springcloudnacos-consumer</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
 
        <!-- nacos注册中心-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!-- nacos配置中心-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-loadbalancer</artifactId>
        </dependency>
 
    </dependencies>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <testFailureIgnore>true</testFailureIgnore>
                </configuration>
            </plugin>
        </plugins>
    </build>
 
</project>

（2）消费者的pom文件里引入了feign的依赖

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

（3）spring cloud nacos consumer服务的启动类

package com.example.springcloudnacosconsumer;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
 
@SpringBootApplication
@EnableFeignClients
@EnableDiscoveryClient
public class SpringcloudnacosConsumerApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(SpringcloudnacosConsumerApplication.class, args);
    } 
}

（4）spring cloud nacos consumer服务的yml配置

spring:
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
  application:
    name: nacos-consumer
server:
  port: 8091

（5）新建了feigin文件夹
创建了一个新的接口

package com.example.springcloudnacosconsumer.feign;

import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.cloud.openfeign.FeignClient;
@RefreshScope
@FeignClient(name="nacos-provider",value ="nacos-provider" )

public interface TestFeignClient {

    @RequestMapping(value = "/testNacosProvider")
    String testNacosProvider();
}

（6）消费者的控制器为

package com.example.springcloudnacosconsumer.controller;

import com.example.springcloudnacosconsumer.feign.TestFeignClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;


@RestController
public class NacosConsumerController{

    @Autowired

    private TestFeignClient testFeignClient;

    @RequestMapping("/testNacosConsumer")
    public String testNacosConsumer(){

       String str = testFeignClient.testNacosProvider();
        return str;

    }

}

nacos里


image.png

运行结果
请求提供者


请求消费者


image.png

说明请求通了 消费者调用了服务提供者的接口

上面的参考了 spring cloud nacos服务搭建_springcloud搭建nacos-CSDN博客
感谢作者

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