nacos项目搭建(服务提供者，服务消费者)

spring cloud ablibaba 版本说明

https://github.com/alibaba/spring-cloud-alibaba/wiki/版本说明

启动nacos服务

官网:
https://nacos.io/zh-cn/docs/what-is-nacos.html

服务提供者

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>2.2.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.wzq.example</groupId>
    <artifactId>cloud_provider</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>cloud_provider</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <spring.cloud.version>Hoxton.SR8</spring.cloud.version>
        <spring.cloud.alibaba.version>2.2.5.RELEASE</spring.cloud.alibaba.version>
        <spring.boot.version>2.2.5.RELEASE</spring.boot.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <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>

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

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

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

主要添加这个jar: spring-cloud-starter-alibaba-nacos-discovery

application.properties

server.port=8081
spring.application.name=nacos-provider
spring.cloud.nacos.discovery.server-addr=192.168.60.128:8848
management.endpoints.web.exposure.include=*

CloudProviderApplication.java (服务提供者启动类)

package com.wzq.example.cloud_provider;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@EnableDiscoveryClient
public class CloudProviderApplication {

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

    @RestController
    public class EchoController {
        @GetMapping(value = "/echo/{string}")
        public String echo(@PathVariable String string) {
            return "Hello Nacos Discovery " + string;
        }
    }

}

服务提供者完成(启动后nacos console就能看到了)

---

服务消费者

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>2.2.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.wzq.example</groupId>
    <artifactId>cloud_consumer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>cloud_consumer</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <spring.cloud.version>Hoxton.SR8</spring.cloud.version>
        <spring.cloud.alibaba.version>2.2.5.RELEASE</spring.cloud.alibaba.version>
        <spring.boot.version>2.2.5.RELEASE</spring.boot.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <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>

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

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

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

application.properties

server.port=8082
spring.application.name=nacos-consumer
spring.cloud.nacos.discovery.server-addr=192.168.60.128:8848
management.endpoints.web.exposure.include=*

CloudConsumerApplication.java(服务消费者启动类)

package com.wzq.example.cloud_consumer;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@SpringBootApplication
@EnableDiscoveryClient
public class CloudConsumerApplication {

    @RestController
    public class NacosController{

        @Autowired
        private LoadBalancerClient loadBalancerClient;
        @Autowired
        private RestTemplate restTemplate;

        @Value("${spring.application.name}")
        private String appName;

        @GetMapping("/echo/app-name")
        public String echoAppName(){
            //Access through the combination of LoadBalanceClient and RestTemplate
            ServiceInstance serviceInstance = loadBalancerClient.choose("nacos-provider");
            String path = String.format("http://%s:%s/echo/%s",serviceInstance.getHost(),serviceInstance.getPort(),appName);
            System.out.println("request path:" +path);
            return restTemplate.getForObject(path,String.class);
        }

    }

    //Instantiate RestTemplate Instance
    @Bean
    public RestTemplate restTemplate(){

        return new RestTemplate();
    }

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

}

---

请求消费者接口

GET http://localhost:8082/echo/app-name