spring cloud alibaba入门demo

怼烎@ 2022-11-25 04:17 207阅读 0赞

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## 一、搭建环境 ##

### 1.1 安装Nacos ###

> 下载解压启动  
> bin/startup.sh -m standalone  
> 访问  
> ip:8848/nacos/\#/login

### 1.2 构建环境 ###

创建环境，引入依赖

<dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>com.alibaba.cloud</groupId>
                    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                    <version>2.2.0.RELEASE</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>

## 二、开始 ##

### 2.1 服务注册 ###

#### 2.1.1 引入依赖 ####

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

#### 2.1.2 启动nacos 客户端 ####

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

#### 2.1.3 配置文件 ####

位置在:src\\main\\resources\\application.yml

spring:
      cloud:
        nacos:
          discovery:
            server-addr: 192.168.88.51:8848
      application:
        name: ordermanager
    server:
      port: 8080

### 2.2 配置中心 ###

#### 2.2.1 引入依赖 ####

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

#### 2.2.2 配置 ####

在src\\main\\resources创建配置文件 bootstrap.yml

spring:
      application:
        name: ordermanager
      cloud:
        nacos:
          config:
            server-addr: 192.168.88.51:8848

#### 2.2.3 发布配置 ####

在nacos 中发布 Data Id 为\*\*`${appllication-name}`.`${file-extension}`\*\* 的配置文件

user.id=1
    user.name=james
    user.age=23

#### 2.2.4 注入配置 ####

@RestController
    @RefreshScope //实时刷新
    public class SampleCroller { 
        @Value("${user.name}")
        String userName;
        @Value("${user.age}")
        int age;
    
        @RequestMapping("/user")
        public String simple() { 
            return "Hello Nacos Config!" + "Hello " + userName + " " + age ;
        }
    }

### 2.3 服务调用 ###

#### 2.3.1 引入依赖 ####

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
                <version>2.2.2.RELEASE</version>
            </dependency>

#### 2.3.2 启用openfien 客户端 ####

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

#### 2.3.3 服务调用 ####

客户端代码

@Component
    @FeignClient("ordermanager")
    public interface OrderManager { 
        @RequestMapping("/user")
        public String getConfig();
    }

服务端代码

@RestController
    @RefreshScope
    public class SampleCroller { 
        @Value("${user.name}")
        String userName;
        @Value("${user.age}")
        int age;
    
        @RequestMapping("/user")
        public String simple() { 
            return "Hello Nacos Config!" + "Hello " + userName + " " + age ;
        }
    }

### 2.4 服务网关 ###

#### 2.4.1 引入依赖 ####

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-gateway</artifactId>
                <version>2.2.2.RELEASE</version>
                <exclusions>
                    <exclusion>
                        <artifactId>spring-web</artifactId>
                        <groupId>org.springframework</groupId>
                    </exclusion>
                    <exclusion>
                        <artifactId>spring-boot-starter-webflux</artifactId>
                        <groupId>org.springframework.boot</groupId>
                    </exclusion>
                </exclusions>
            </dependency>

#### 2.4.2 配置路由 ####

spring:
      cloud:
        gateway:
          routes:
            - id: test_route
              uri: https://www.baidu.com
              predicates:
                - Query=url,baidu
    
            - id: qq_route
              uri: https://www.qq.com
              predicates:
                - Query=url,qq

附上github地址: https://github.com/RoundYuanYuan/springcloudalibabademo