Nacos教程_2 讲解

教程原稿 https://gitee.com/fakerlove/joker-nacos

2. 讲解

2.1 入门流程

发布配置

添加依赖

版本的话，和nacos 页面版本，尽量一致。现在版本在2.0

<?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>

    <groupId>org.example</groupId>
    <artifactId>kaoyan-cloud</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/com.alibaba.nacos/nacos-client -->
        <dependency>
            <groupId>com.alibaba.nacos</groupId>
            <artifactId>nacos-client</artifactId>
            <version>1.4.0</version>
        </dependency>

    </dependencies>

</project>

main 函数

package com.ak;

import com.alibaba.nacos.api.NacosFactory;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.exception.NacosException;

import java.util.Properties;

public class demo1 {

    public static void main(String[] args) throws NacosException {
        // 使用nacos 来获取配置
        String serverAddr="47.100.104.187:8848";

        String dataID="nacos-simple-demo1.yml";

        String group="DEFAULT_GROUP";


        Properties properties =new Properties();
        properties.put("serverAddr",serverAddr);
        ConfigService service=NacosFactory.createConfigService(properties);

        String config=service.getConfig(dataID,group,5000);
        System.out.println(config);
    }
}

远程获取结果

2.2 配置管理

1) 命名空间

新建命名空间

在不同的命名空间下，建立不同的yml

然后开始运行

package com.ak;

import com.alibaba.nacos.api.NacosFactory;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.exception.NacosException;

import java.util.Properties;

public class demo2 {

    public static void main(String[] args) throws NacosException {
        // 使用nacos 来获取配置
        String serverAddr="47.100.104.187:8848";

        String dataID="nacos-simple-demo1.yml";

        String group="DEFAULT_GROUP";
        String nameSpace="cf6270d3-a5d2-46ac-a36a-051ef8fd0151";


        Properties properties =new Properties();
        properties.put("serverAddr",serverAddr);
        properties.put("namespace",nameSpace);
        ConfigService service=NacosFactory.createConfigService(properties);

        String config=service.getConfig(dataID,group,5000);
        System.out.println(config);
    }
}

结果

2) 监听

package com.ak;

import com.alibaba.nacos.api.NacosFactory;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.config.listener.Listener;
import com.alibaba.nacos.api.exception.NacosException;

import java.util.Properties;
import java.util.concurrent.Executor;

public class demo2 {

    public static void main(String[] args) throws NacosException {
        // 使用nacos 来获取配置
        String serverAddr="47.100.104.187:8848";

        String dataID="nacos-simple-demo1.yml";

        String group="DEFAULT_GROUP";
        String nameSpace="cf6270d3-a5d2-46ac-a36a-051ef8fd0151";
        Properties properties =new Properties();
        properties.put("serverAddr",serverAddr);
        properties.put("namespace",nameSpace);
        ConfigService service=NacosFactory.createConfigService(properties);
        String config=service.getConfig(dataID,group,5000);
        System.out.println(config);
        // 添加了监听，当配置信息内容发生改变了，就会发生改变
        service.addListener(dataID, group, new Listener() {
            @Override
            public Executor getExecutor() {
                return null;
            }

            @Override
            public void receiveConfigInfo(String s) {
                System.out.println(s);
            }
        });
        while (true){
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

结果

3) 登录管理

生成code

package com.ak;

import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

/**
 *使用验证码
 */
public class demo3 {
    public static void main(String[] args) {
        String password=new BCryptPasswordEncoder().encode("123");
        System.out.println(password);
    }
}

修改数据库user 和admin

use nacos_config;
insert into users(username,password,enabled) values("joker","$2a$10$7hViVnEt5Z8k6KfvTcZvR.kSQvNKuTaH/3H.9EKlQLZ7IIlFJw5Ia",TRUE);
insert into roles(username,role) values("joker","ROLE_ADMIN");

退出，使用joker，密码123 登录