nacos：服务注册与发现

news2024/11/20 8:29:08

导入SpringCloudAlibaba相关的依赖，并在父工程将依赖进行管理

<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.2.0</version>
</dependency>

   
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>2021.0.1</version>
   <type>pom</type>
<scope>import</scope>
</dependency>

    
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>2021.0.1.0</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>

在idea中加入nacos服务端并进行配置

选择脚本程序，修改工作目录，选择脚本路径

修改cmd文件，将集群模式改为单例模式，将MODE改为standalone或在脚本选型中添加

-m standalone

然后就可以启动服务端了

在其他子项目中添加服务发现依赖

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

然后在配置文件中配置Nacos注册中心的地址

server:
port: 8101
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://cloudstudy.mysql.cn-chengdu.rds.aliyuncs.com:3306/jdbc
username: test
password: 123456
application:
name: bookservice
cloud:
nacos:
discovery:
# 配置Nacos注册中心地址
server-addr: localhost:8848

使用OpenFeign和loadbalancer，实现服务发现远程调用和负载均衡

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>

在启动类上添加@EnableFeignClients注解

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

现在就可以编写服务调用的接口

@FeignClient("userservice")
public interface UserClient {
    
    @RequestMapping("/user/{uid}")
    User getUserById(@PathVariable("uid") int uid);
}