Springcloud 集成 Nacos简单服务调用

清疚 2023-10-02 17:04 36阅读 0赞

[LINUX NACOS 快速启动][LINUX NACOS]

[Springcloud 集成 Nacos注册中心][Springcloud _ Nacos]

[Springcloud 集成 Nacos配置中心][Springcloud _ Nacos 1]

--------------------

## **1.Provider 服务提供者** ##

### 1.1）pom.xml ###

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
                <version>${spring-nacos.version}</version>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
                <version>${spring-nacos.version}</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-commons</artifactId>
                <version>${spring-cloud.version}</version>
            </dependency>

### 1.2）bootstrap.yml ###

server:
      port: 12316
    
    spring:
      application:
        name: user-api
      cloud:
        nacos:
          discovery:
            server-addr: 127.0.0.1:8848
          config:
            server-addr: 127.0.0.1:8848
            file-extension: yml

### 1.3）启动类 ###

package com.lhy.user;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    @SpringBootApplication
    @EnableDiscoveryClient
    public class UserApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(UserApplication.class, args);
        }
    
    }

### 1.4）提供服务 ###

package com.lhy.user.controller;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.cloud.context.config.annotation.RefreshScope;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * Class description.
     *
     * @author ocean liu
     * @createTime 2021/11/29 - 10:57
     */
    @RequestMapping("/user")
    @RestController
    @RefreshScope // 支持动态更新
    public class UserController {
    
        @Value("${user.headPortrait:123.png}")
        private String headPortrait;
    
        @GetMapping("/headPortrait")
        public String headPortrait() {
            return headPortrait;
        }
    
    }

--------------------

## **2.Consumer 消费者** ##

### 2.1）pom.xml ###

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
                <version>2.2.2.RELEASE</version>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
                <version>${spring-nacos.version}</version>
            </dependency>
            
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-commons</artifactId>
                <version>${spring-cloud.version}</version>
            </dependency>

### 2.2）bootstrap.yml ###

server:
      port: 12315
    
    spring:
      application:
        name: cloud-api
      cloud:
        nacos:
          discovery:
            server-addr: 127.0.0.1:8848

Nacos默认集成了Ribbon，默认负载均衡策略是轮询，可以同步如下配置调整负载策略

# 调用服务的spring.application.name
    user-api:
      ribbon:
        # com.netflix.loadbalancer.RoundRobinRule           默认 轮询
        # com.netflix.loadbalancer.RandomRule               随机
        # com.netflix.loadbalancer.BestAvailableRule        最小并发
        # com.netflix.loadbalancer.WeightedResponseTimeRule 响应时间 权重
        # com.netflix.loadbalancer.ZoneAvoidanceRule        复合判读 区域性能也服务可用性
        # com.netflix.loadbalancer.RetryRule                失败重试
        NFLoadBalancerRuleClassName: com.netflix.loadbalancer.RandomRule

### 2.3）启动类 ###

package com.lhy.cloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.client.loadbalancer.LoadBalanced;
    import org.springframework.context.annotation.Bean;
    import org.springframework.web.client.RestTemplate;
    
    @SpringBootApplication
    @EnableDiscoveryClient
    public class CloudApiApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(CloudApiApplication.class, args);
        }
    
        @LoadBalanced    // 开启负载均衡策略
        @Bean
        public RestTemplate restTemplate() {
            return new RestTemplate();
        }
    
    }

### 2.4）服务调用者 ###

package com.lhy.cloud.controller;
    
    import org.springframework.beans.factory.annotation.Autowired;
    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;
    
    /**
     * Class description.
     *
     * @author ocean liu
     * @createTime 2021/11/29 - 10:57
     */
    @RequestMapping("/cloud")
    @RestController
    public class CloudController {
    
        @Autowired
        private RestTemplate restTemplate;
    
        @GetMapping("/user/headPortrait")
        public String headPortrait() {
            return restTemplate.getForObject("http://user-api/user/headPortrait", String.class);
        }
    
    }

### 2.5）验证 ###

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[LINUX NACOS]: https://blog.csdn.net/qq_34253002/article/details/121561237?spm=1001.2014.3001.5501
[Springcloud _ Nacos]: https://blog.csdn.net/qq_34253002/article/details/121608128?spm=1001.2014.3001.5501
[Springcloud _ Nacos 1]: https://blog.csdn.net/qq_34253002/article/details/121608988?spm=1001.2014.3001.5501
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