java Nacos

已于 2025-04-24 00:04:26 修改
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于 2025-04-23 18:07:59 首次发布
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本文链接：https://blog.youkuaiyun.com/csdndd521/article/details/147459968
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windows下载nacos，版本2.x的，1.0的话会出现“Server check fail, please check server 127.0.0.1 ,port 9848 is available , error ={}” 这个鬼问题

下载链接
这里用的是2.0.4版本，启动的话用 startup.cmd -m standalone，单体启动，要不然直接点击启动的话会报错

boot

这里服务端用的boot的，导入依赖

        <!-- Nacos 组件依赖 -->
        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>nacos-discovery-spring-boot-starter</artifactId>
            <version>0.2.3</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>nacos-config-spring-boot-starter</artifactId>
            <version>0.2.3</version>
        </dependency>

配置文件

server:
  port: 9124
  application:
    name: nacosProject
spring:
    profiles:
      active: dev
nacos:
  config:
    server-addr: 127.0.0.1:8848
  discovery:
    server-addr: 127.0.0.1:8848

启动类上加，这里的WARE_ID,是 Data Id，对应上

@NacosPropertySource(dataId = "WARE_ID", autoRefreshed = true)
@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication springApplication = new SpringApplication(Application.class);
        ConfigurableApplicationContext configurableApplicationContext = springApplication.run(args);
    }
}

nacos页面上添加配置
在这里插入图片描述

然后代码config




import com.alibaba.nacos.api.annotation.NacosInjected;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.naming.NamingService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import javax.annotation.PostConstruct;
@Configuration
public class NacosConfig {

    @Value("${server.port}")
    private int serverPort;
    @Value("${spring.application.name}")
    private String applicationName;
    @NacosInjected
    private NamingService namingService;
    @PostConstruct
    public void registerInstance() throws NacosException {
        namingService.registerInstance(applicationName, "127.0.0.1", serverPort);
    }

}

控制层中

@RestController
public class Controller {



    @GetMapping("/test")
    public Rs tt(){

        return Rs.success("11");
    }

    @NacosValue(value = "${MyName:null}", autoRefreshed = true)
    private String myName;
    @NacosValue(value = "${project:null}", autoRefreshed = true)
    private String project;

    @ApiOperation(value="查询配置信息")
    @GetMapping(value = "/info")
    public String info () {
        return myName+":"+project;
    }

    @NacosInjected
    private NamingService namingService;

    @ApiOperation(value="查询服务列表")
    @GetMapping(value = "/getServerList")
    public List<Instance> getServerList (@RequestParam String serviceName) {
        try {
            return namingService.getAllInstances(serviceName) ;
        } catch (Exception e){
            e.printStackTrace();
        }
        return null ;
    }

}

然后启动服务，再页面查看是否正常
在这里插入图片描述
这个就可以了，然后消费

消费用的cloud

创建项目，主项目依赖pom

<?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">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.1</version>
    </parent>

    <groupId>com.tt</groupId>
    <artifactId>nacosTt</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>test1</module>
    </modules>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <!--springboot的版本-->
        <spring.boot.version>2.6.6</spring.boot.version>
        <!--SpringCloud alibaba的版本-->
        <spring.cloud.alibaba.version>2021.0.4.0</spring.cloud.alibaba.version>
        <!--SpringCloud的版本-->
        <spring.cloud.version>2021.0.4</spring.cloud.version>
        <!--mybatisPlus的版本-->
        <mybatis_plus.version>3.5.2</mybatis_plus.version>
        <mysql.version>8.0.28</mysql.version>
        <lombok.version>1.18.24</lombok.version>
        <druid.version>1.2.9</druid.version>
        <fastjson.version>2.0.19</fastjson.version>
    </properties>


    <dependencyManagement>
    //这三必须要
        <dependencies>
            <!-- Spring Boot Dependencies -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring.boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring.cloud.alibaba.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>
        </dependencies>
    </dependencyManagement>

</project>

子项目创建，依赖，这里用的openfeign调用

<?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>nacosTt</artifactId>
        <groupId>com.tt</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>test1</artifactId>

    <dependencies>

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

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

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

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

        <!-- Nacos 组件依赖 -->
        <!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-alibaba-nacos-discovery -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

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

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

    </dependencies>
</project>

配置文件

# application.yaml
spring:
  application:
    name: openfeignProject
  cloud:
    nacos:
      config:
        server-addr: http://127.0.0.1:8848
server:
  port: 9125

启动类，添加@EnableFeignClients

package com.tt;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.ConfigurableApplicationContext;

/**
 * @author lhd
 */
@EnableFeignClients
@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication springApplication = new SpringApplication(Application.class);
        ConfigurableApplicationContext configurableApplicationContext = springApplication.run(args);
    }



}

然后调用

package com.tt.tt.controller;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;

@FeignClient("nacosProject")
public interface ProviderClient {

    @GetMapping("/test")
    String hi();
}

控制层调用

package com.tt.tt.controller;

import com.tt.tt.common.Rs;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class Controller {

    @Autowired
    ProviderClient providerClient;

    @GetMapping("/test1")
    public Rs tt(){

        return Rs.success(providerClient.hi());
    }



}

添加cloud服务端

pom

<?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>nacosTt</artifactId>
        <groupId>com.tt</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>nacos</artifactId>

    <dependencies>

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


        <!-- Nacos 组件依赖 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

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

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

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

    </dependencies>

</project>

application.yml

# application.yaml
spring:
  application:
    name: nacosProject
  cloud:
    nacos:
      discovery:  #注册
        server-addr: 127.0.0.1:8848
      config:   # 配置中心
        server-addr: 127.0.0.1:8848
        file-extension: yml
  config:
    import:
      #      nacosProject-dev.yml 与nacos中dataId一致
      - nacos:nacosProject-dev.yml
  profiles:
    active: dev   # 拉取dev配置文件
server:
  port: 9124

在这里插入图片描述
控制层调用

@RestController
public class Controller {

    //project.MyName 与 配置内容中属性一直即可
    @Value("${project.MyName}")
    private String  name;

    @GetMapping("/test")
    public Rs tt(){

        return Rs.success(name);
    }


}
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