Nacos 搭建nacos环境

搭建nacos环境

1 安装nacos

        下载地址: https://github.com/alibaba/nacos/releases

        下载zip格式的安装包,然后进行解压缩操作

2 启动nacos

        #切换目录

        cd nacos/bin

        #命令启动

        startup.cmd -m standalone

3 访问nacos

  打开浏览器输入http://localhost:8848/nacos,即可访问服务, 默认密码是nacos/nacos
Nacos 搭建nacos环境

将商品服务注册到nacos

  接下来开始修改 shop-product 模块的代码, 将其注册到nacos服务上

  1 在pom.xml中添加nacos的依赖

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

  2.在主启动类上添加nacos的开启注解

package com.cyy.product;
 
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
 

@SpringBootApplication
@EnableDiscoveryClient
@MapperScan(basePackages = "com.cyy.product.mapper")
public class ProductApplication {
    public static void main(String[] args) {
        SpringApplication.run(ProductApplication.class,args);
    }
}

  3.在application.propreties添加nacos的配置

#配置nacos注册中心的地址
spring.cloud.nacos.server-addr=localhost:8848

  4.启动服务,观察nacos的控制面板中是否有注册上来的商品微服务

Nacos 搭建nacos环境

将订单微服务注册到nacos上

  接下来开始修改 order 模块的代码, 将其注册到nacos服务上

  1.在pom.xml中添加nacos的依赖

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

  2.在主启动类上添加nacos的开启注解

package com.cyy.order;
 
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
 

@SpringBootApplication
@EnableDiscoveryClient
@MapperScan(basePackages = "com.cyy.order.mapper")
public class OrderApplication {
    public static void main(String[] args) {
        SpringApplication.run(com.cyy.order.OrderApplication.class,args);
    }
    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

  3.在application.propreties添加nacos服务的地址

spring.application.name=order
spring.cloud.nacos.server-addr=localhost:8848

  4.启动服务, 观察nacos的控制面板中是否有注册上来的订单微服务

Nacos 搭建nacos环境

   5.修改OrderController中的代码

package com.cyy.order.controller;
 
import com.cyy.entry.Order;
import com.cyy.entry.Product;
import com.cyy.order.service.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
 
import java.util.List;
 

//@RestController
//@RequestMapping("order")
public class OrderController_write {
    @Autowired
    private OrderService orderService;
    @Autowired
    private RestTemplate restTemplate;
    @Autowired
    private DiscoveryClient discoveryClient;
 
    @GetMapping("saveOrder")
    public String saveOrder(Integer pid,Integer num){//商品id 购买数量 收货地址
        Order order=new Order();
        order.setNumber(num);//设置订单的数量
        order.setUid(1);
        order.setUsername("xxx");
 
        order.setPid(pid);
        //根据商品id查询商品对应的信息--->调用远程商品服务
        //基于TCP协议--rpc远程方法调用 速度快 但是非常消耗资源 因为TCP属于常链接
        //基于HTTP协议---->速度慢 但是资源消耗少 属于短链接
 
        List<ServiceInstance> instances = discoveryClient.getInstances("product");
        int index=(int)(Math.random()*instances.size());
 
        ServiceInstance instance = instances.get(index);
        Product product = restTemplate.getForObject(instance.getUri()+"/product/selectById/" +
                pid, Product.class);
 
        order.setPname(product.getPname());
        order.setPprice(product.getPprice());
        orderService.saveOrder(order);
        return  "下单成功";
    }
}

6.启动服务, 观察nacos的控制面板中是否有注册上来的订单微服务,然后通过访问消费者服务验证调用是否成功

Nacos 搭建nacos环境

 转自:https://blog.csdn.net/Hedeghog_cyy/article/details/118555486

 

上一篇:java反射的用法,如果你看了还不会用我也没办法了


下一篇:设计模式(5)建造者模式