Nacos教程_2 讲解

男娘i 2023-01-06 11:45 137阅读 0赞

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

### 文章目录 ###

*  2. 讲解
 *   *  2.1 入门流程
     *   *  发布配置
         *  添加依赖
         *  main 函数
         *  远程获取结果
     *  2.2 配置管理
     *   *  1) 命名空间
         *  2) 监听
         *  3) 登录管理

# 2. 讲解 #

## 2.1 入门流程 ##

### 发布配置 ###

![0c952ef23ea6733c729a63a02f593974.png][]

### 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>
            
            <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 ###

![b9c80e3aeabab14a627280717c95cee0.png][]

## 2.2 配置管理 ##

### 1) 命名空间 ###

![a443fc973bbe0f36638a3dcc6978b22b.png][]

新建命名空间

![55b37f0b65a76df7c29ad2202d5f50a6.png][]

在不同的命名空间下，建立不同的yml

![image-20210113093126400][]

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

![image-20210113093211004][]

### 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

![image-20210113094321484][]

### 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);
        }
    }

![image-20210113095655070][]

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

![image-20210113095744715][]

[0c952ef23ea6733c729a63a02f593974.png]: /images/20221119/4b85fc2e90874335a6ded06cf88b7c26.png
[b9c80e3aeabab14a627280717c95cee0.png]: https://img-blog.csdnimg.cn/img_convert/b9c80e3aeabab14a627280717c95cee0.png
[a443fc973bbe0f36638a3dcc6978b22b.png]: https://img-blog.csdnimg.cn/img_convert/a443fc973bbe0f36638a3dcc6978b22b.png
[55b37f0b65a76df7c29ad2202d5f50a6.png]: https://img-blog.csdnimg.cn/img_convert/55b37f0b65a76df7c29ad2202d5f50a6.png
[image-20210113093126400]: https://img-blog.csdnimg.cn/img_convert/cd92a12854eec519ef0db81722b1bcc3.png
[image-20210113093211004]: https://img-blog.csdnimg.cn/img_convert/787d2b47aa23e0bab92362a4963f77a5.png
[image-20210113094321484]: https://img-blog.csdnimg.cn/img_convert/18228504f812f21305c0a215c6925666.png
[image-20210113095655070]: https://img-blog.csdnimg.cn/img_convert/1a1717fa81a5870348805ed857db71b5.png
[image-20210113095744715]: https://img-blog.csdnimg.cn/img_convert/1757e325c9ca46b53b1708fe5f14e26b.png