spring-cloud-alibaba入门学习(一)

这个是我根据bibi上面周阳老师的的教材自己看着学的总结，可能会有我理解错的地方。

1. nacos安装
   
   在github https://github.com/alibaba/nacos上面下载nacos的安装包并解压，进入nacos/bin目录中执行sh startup.sh -m
   standalone命令，在win系统下执行startup.cmd -m standalone
   启动成功后访问localhost:8848，用户么和密码都是nacos。
    
2. 创建一个父级springboot项目，其pom文件为：
    

   <!-- 统一管理jar包版本 -->
     <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <maven.compiler.source>1.8</maven.compiler.source>
       <maven.compiler.target>1.8</maven.compiler.target>
       <junit.version>4.12</junit.version>
       <log4j.version>1.2.17</log4j.version>
       <lombok.version>1.16.18</lombok.version>
       <mysql.version>5.1.47</mysql.version>
       <druid.version>1.1.16</druid.version>
       <mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
     </properties>
   
     <!-- 子模块继承之后，提供作用：锁定版本+子modlue不用写groupId和version  -->
     <dependencyManagement>
       <dependencies>
         <!--spring boot 2.2.2-->
         <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-dependencies</artifactId>
           <version>2.2.2.RELEASE</version>
           <type>pom</type>
           <scope>import</scope>
         </dependency>
         <!--spring cloud Hoxton.SR1-->
         <dependency>
           <groupId>org.springframework.cloud</groupId>
           <artifactId>spring-cloud-dependencies</artifactId>
           <version>Hoxton.SR1</version>
           <type>pom</type>
           <scope>import</scope>
         </dependency>
         <!--spring cloud alibaba 2.1.0.RELEASE-->
         <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>mysql</groupId>
           <artifactId>mysql-connector-java</artifactId>
           <version>${mysql.version}</version>
         </dependency>
         <dependency>
           <groupId>com.alibaba</groupId>
           <artifactId>druid</artifactId>
           <version>${druid.version}</version>
         </dependency>
         <dependency>
           <groupId>org.mybatis.spring.boot</groupId>
           <artifactId>mybatis-spring-boot-starter</artifactId>
           <version>${mybatis.spring.boot.version}</version>
         </dependency>
         <dependency>
           <groupId>junit</groupId>
           <artifactId>junit</artifactId>
           <version>${junit.version}</version>
         </dependency>
         <dependency>
           <groupId>log4j</groupId>
           <artifactId>log4j</artifactId>
           <version>${log4j.version}</version>
         </dependency>
         <dependency>
           <groupId>org.projectlombok</groupId>
           <artifactId>lombok</artifactId>
           <version>${lombok.version}</version>
           <optional>true</optional>
         </dependency>
       </dependencies>
     </dependencyManagement>

   在父级项目下创建module,其pom文件为：

   <dependencies>
           <!--SpringCloud ailibaba nacos -->
           <dependency>
               <groupId>com.alibaba.cloud</groupId>
               <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
           </dependency>
           <!-- SpringBoot整合Web组件 -->
           <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>
           <!--日常通用jar包配置-->
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-devtools</artifactId>
               <scope>runtime</scope>
               <optional>true</optional>
           </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>

   
   配置文件为:

   server:
     port: 9001
   
   spring:
     application:
       name: nacos-payment-provider
     cloud:
       nacos:
         discovery:
           server-addr: localhost:8848 #配置Nacos地址
   
   management:
     endpoints:
       web:
         exposure:
           include: '*'

   主启动类：

   @EnableDiscoveryClient
   @SpringBootApplication
   public class PaymentMain9001 {
       public static void main(String[] args) {
           SpringApplication.run(PaymentMain9001.class, args);
       }
   }
   

   
   创建测试controller：

   @RestController
   public class PaymentController {
   
       @Value("${server.port}")
       private String serverPort;
   
       @GetMapping(value = "/payment/nacos/{id}")
       public String getPayment(@PathVariable("id") Integer id) {
           return "nacos registry, serverPort: "+ serverPort+"\t id"+id;
       }
   
   }

   启动当前的项目，并进入nacos，如果出现如下信息则说明我们成功将服务注册进了nacos
   
   
   
   同时我们访问localhost:9001//payment/nacos/1，如果能成功访问说明项目成功。