Nacos入门级别使用：注册中心和配置中心

1 Nacos下载

从Nacos下载地址下载到本地，选择zip即可
在这里插入图片描述

2 Nacos作为注册中心

2.1 Nacos服务端启动步骤

配置JAVA_HOME,如下图
修改nacos下conf里面application.properties里面的数据库url等

改成类似下图即可，具体就是db.num
执行nacos-mysql.sql，初始化数据库
修改startup.cmd，将集群模式改为单机模式
点击startup.cmd即可启动，访问日志中打印的nacos管理网址即可

2.2 客户端使用

引入nacos客户端依赖以及父工程依赖版本管理

<?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>gulimall</artifactId>
        <groupId>xyz.yq56</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>common</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-nacos-discovery</artifactId>
        </dependency>
    </dependencies>

</project>

父工程

<?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>
    <groupId>xyz.yq56</groupId>
    <artifactId>gulimall</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gulimall</name>
    <description>聚合服务</description>
    <packaging>pom</packaging>


    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.3.5.RELEASE</spring-boot.version>
        <spring-cloud.version>Hoxton.SR9</spring-cloud.version>
        <mybatis-plus.version>3.2.0</mybatis-plus.version>
        <commons-lang.version>2.6</commons-lang.version>
        <commons-io.version>2.5</commons-io.version>
        <spring-cloud-alibaba.version>2.1.0.Release</spring-cloud-alibaba.version>
    </properties>

    <modules>
        <module>product</module>
        <module>ware</module>
        <module>member</module>
        <module>order</module>
        <module>coupon</module>
        <module>renren-fast</module>
        <module>renren-generator</module>
        <module>common</module>
    </modules>


    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>${mybatis-plus.version}</version>
            </dependency>
            <dependency>
                <groupId>commons-lang</groupId>
                <artifactId>commons-lang</artifactId>
                <version>${commons-lang.version}</version>
            </dependency>
            <dependency>
                <groupId>commons-io</groupId>
                <artifactId>commons-io</artifactId>
                <version>${commons-io.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>



</project>

启动类添加注解: @EnableDiscoveryClient
配置nacos服务端地址

spring:
  datasource:
    #MySQL配置
    driverClassName: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/gulimall_admin?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=Asia/Shanghai
    username: root
    password: root
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

mybatis-plus:
  mapper-locations: classpath*:/mapper/**/*.xml

3 Nacos作配置中心

3.1 使用步骤

引入config依赖

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

增加配置bootstrap.properties

spring.application.name=gulimall.product
spring.cloud.nacos.config.server-addr=127.0.0.1:8848

nacos新增配置数据集，DataID为服务名.properties，对于上面的服务为gulimall.product.properties
需动态刷新配置处，增加两个注解@RefreshScope和@Value
使用时，到nacos点击对应配置-编辑-发布即可刷新配置，而无需重启服务
特别注意：配置中心的配置优先级比本地配置更高

Nacos入门级别使用：注册中心和配置中心

1 Nacos下载

2 Nacos作为注册中心

2.1 Nacos服务端启动步骤

2.2 客户端使用

3 Nacos作配置中心

3.1 使用步骤

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