Nacos服务中心：服务发现与服务注册

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1、安装并启动Nacos

# 单机启动命令
startup.cmd -m standalone

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2、pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.13.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.geovis</groupId>
    <artifactId>usercenter</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>usercenter</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencyManagement>
        <!--SpringBoot整合Spring Cloud-->
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--SpringBoot整合Spring Cloud Alibaba-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>0.9.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>


    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--服务发现依赖-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>


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

        <!--通用mapper依赖-->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>2.1.5</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.6</version>
                <configuration>
                    <configurationFile>
                        ${basedir}/src/main/resources/generator/generatorConfig.xml
                    </configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>8.0.19</version>
                    </dependency>
                    <dependency>
                        <groupId>tk.mybatis</groupId>
                        <artifactId>mapper</artifactId>
                        <version>4.1.5</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>
</project>

3、application.properties

server.port=8080

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://192.168.1.13:3306/user_center?characterEncoding=UTF8&serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=123456

# 服务名称尽量用-，不要用_或特殊字符
spring.application.name=user-center
# nacos服务中心地址
spring.cloud.nacos.discovery.server-addr=localhost:8848
# 指定微服务实例所在的命名空间ID
spring.cloud.nacos.discovery.namespace=476e087f-6df4-499a-af4c-9dc933293655
# 指定微服务实例所在的集群名称
spring.cloud.nacos.discovery.cluster-name=NanJing

4、微服务接口调用

package com.geovis.usercenter.controller.user;


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 java.util.List;

@RestController
@RequestMapping("/test")
public class TestController {

    @Autowired
    private DiscoveryClient discoveryClient;

    /*
    * 获取内容中心所有的实例信息
    * */
    @GetMapping(value = "/getInstances")
    public List<ServiceInstance> getInstances(){
        return discoveryClient.getInstances("content-center");
    }

    /*
     * 获取内容中心的某个接口地址
     * */
    @GetMapping(value = "/shareTest")
    public String shareTest(){
        List<ServiceInstance> clientInstances = discoveryClient.getInstances("content-center");
        ServiceInstance instance = clientInstances.get(0);
        String url = instance.getUri()+"/share/insertShare";
        return url;
    }
}