springcloud入門超級詳解-有解無憂

一，什么是微服務

微服務的核心就是將傳統的一站式應用，根據業務拆分成一個個的服務，徹底去解耦，每一個微服務提供單個業務功能得服務，一個服務做一件事情，從技術角度上看，就是一種小而獨立的處理程序，能夠自行單獨啟動或銷毀，擁有自己獨立的資料庫
用官方的話來說

基于springboot提供了一套微服務解決方案，包括服務注冊與發現沒配置中心，全鏈路監控
服務網關，負載均衡，熔斷器等組件，基于NetFlix的開源組件做高度抽象封裝之外，還有一些
選型中立的開源組件

在學習每一門的新技術之前，都離不開官方檔案,如一下參考檔案
https://springcloud.cc/spring-cloud-netflix.html
中文api檔案: https://springcloud.cc/spring-cloud-dalston.html
springcloud中國社區：http://springcloud.cn/
springcloud中文網：https://springcloud.cc

二，談談springcloud和springboot之間的區別

springboot是專注于快速方便的開發單個個體微服務
springcloud是關注全域的微服務協調整理治療框架，他將Springboot開發的一個個單體微服務整合并管理起來，為各個微服務之間提供：配置管理，服務發現，斷路器，路由，微代理，時間總線，全域鎖，決策競選，分布式會話等等集成服務
springboot可以離開springCloud獨立使用，但是springcloud離不開springboot，屬于依賴關系
但是在學習springcloud之前，一定需要先了解springboot的使用

三，這里因為是快速入門，因此以EUREKA的簡單集群版作為演示

在這里插入圖片描述
如圖所示，以Eureka作為服務注冊中心

四，約定 > 配置 > 編碼

1，勾選注解生效
在這里插入圖片描述
檔案編碼改為utf-8

java編譯器改為8

五，父工程(主專案)的構建

1,選擇site目錄
在這里插入圖片描述
2，創建專案之后，修改運行方式，將run運行方式設定為run Bashboard運行方式，即修改 .idea 目錄下的 wrokspace.xml 檔案，在檔案中添加:

<option name="configurationTypes">
      <set>
        <option value="SpringBootApplicationConfigurationType" />
      </set>
</option>

搜索RunDashboard即可
3，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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.atgui.springcloud</groupId>
  <artifactId>cloud2020</artifactId>
  <version>1.0-SNAPSHOT</version>
  <!--子模塊-->
    <modules>
        <module>provider-payment-8001</module>
        <module>consumer-order-80</module>
        <module>api-commons</module>
        <module>eureka-server-7001</module>
        <module>eureka-server-7002</module>
        <module>provider-payment-8011</module>
    </modules>
    <!--不再是默認的jar-->
  <packaging>pom</packaging>

    <!-- 統一管理jar包版本 -->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <junit.version>4.12</junit.version>
        <log4j.version>1.2.17</log4j.version>
        <lombok.version>1.16.18</lombok.version>
        <mysql.version>5.1.47</mysql.version>
        <druid.version>1.1.21</druid.version>
        <mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
    </properties>

    <!-- 子模塊繼承之后，提供作用：鎖定版本+子modlue不用寫groupId和version  -->
    <dependencyManagement>
        <dependencies>
            <!--spring boot 2.2.2-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.2.2.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--spring cloud Hoxton.SR1-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Hoxton.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--spring cloud alibaba 2.1.0.RELEASE-->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>${druid.version}</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>${mybatis.spring.boot.version}</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <fork>true</fork>
                    <addResources>true</addResources>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

六，目錄總結構

在這里插入圖片描述

七，先說說這個通用的api-commons

由于全域只需要這一個物件，因此把他抽取出來
在這里插入圖片描述
1,pom.xml檔案

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud2020</artifactId>
        <groupId>com.atgui.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-api-commons</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
            <scope>provided</scope>
        </dependency>
        <!--熱部署工具-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.1.0</version>
        </dependency>
    </dependencies>
</project>

2,物體類CommonResult

package com.zheng.api.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class CommonResult<T> {
    private Integer code;   //類似404
    private String message; //資訊描述
    private T data;         //
    public CommonResult(Integer code,String message){
        this(code,message,null);
    }
}

3,物體類Payment

package com.zheng.api.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Payment implements Serializable {
    private long id;
    private String serial;

    @Override
    public String toString() {
        return "Payment{" +
                "id=" + id +
                ", serial='" + serial + '\'' +
                '}';
    }
}

八，一個服務注冊中心集群由兩個服務注冊中心組成，分別為eureka-server-7001和eureka-server-7002

1,修改本地埠號路徑映射：C:\WINDOWS\system32\drivers\etc\host
在里面加入,如果加不了，則修改屬性將只讀改為讀寫
在這里插入圖片描述
2，新建maven模塊，使用的普通的即可，以下需要注意一下，將sdk改成如下

3，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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud2020</artifactId>
        <groupId>com.atgui.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>eureka-server-7001</artifactId>
    <dependencies>
        <!--eureka的服務端包-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
        <!-- boot web actuator -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <!--引入自己定義的 api 通用包-->
            <groupId>com.atgui.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <!--熱部署工具-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
    </dependencies>
</project>

4，application.yml

server:
  port: 7001


eureka:
  instance:
    #eureka服務端的實體名稱,最后就是用來注冊到注冊中心，名字隨意
    hostname: eureka7001.com
  client:
    #false表示不向注冊中心注冊自己
    register-with-eureka: false
    #false表示自己端就是注冊中心,職責是維護實體,并不需要檢索服務
    fetch-registry: false
    service-url:
      #設定與Eureka Server 互動的地址查詢服務和注冊服務都需要依賴這個地址
      #defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
      defaultZone: http://eureka7002.com:7002/eureka/
  #        defaultZone: http://eureka7002.com:7002/eureka/  #集群指向其他eureka
  server:
    # 關閉自我保護機制，保證不可用服務被及時剔除.默認開啟保護機制 true
    enable-self-preservation: false
    eviction-interval-timer-in-ms: 2000

5，在主啟動類上加入注解

//開啟eureka注解，代表服務中心
@EnableEurekaServer

6,以上是其中一個注冊中心，而另一個注冊中心復制一模一樣的代碼即可，只需要修改application.yml下的埠號即可

九，兩個服務提供者，分別是provider-payment-8001和provider-payment-8011

1,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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud2020</artifactId>
        <groupId>com.atgui.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>provider-payment-8001</artifactId>
    <dependencies>
        <!--包含了sleuth+zipkin;sleuth鏈路監控展現,P94所需依賴-->
        <!--<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>
-->
        <!--客戶端-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <!--引入自己定義的 api 通用包-->
            <groupId>com.atgui.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>

        <!--下面兩個一定是系結在一塊出現-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jdbc -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
            <scope>provided</scope>
        </dependency>
        <!--熱部署工具-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
    </dependencies>
</project>

2,application.yml

server:
  port: 8001

spring:
  application:
    name: payment-service  #該名字可以隨意起，主要用于注冊中心的呼叫   #該名字可以隨意起，主要用于注冊中心的呼叫
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/springcloud?serverTimezone=GMT%2B8&useSSL=false
    username: root
    password: zhs03171812

mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.zheng.payment.pojo

#引入jar包后
eureka:
  client:
    #表示向注冊中心注冊自己
    register-with-eureka: true
    #false表示自己端就是注冊中心,職責是維護實體,并不需要檢索服務
    fetch-registry: true
    service-url:
      #設定與Eureka Server 互動的地址查詢服務和注冊服務都需要依賴這個地址
      #defaultZone: http://localhost:7001/eureka                      #單機版
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka  #集群版
  instance:
    instance-id: payment8001  #將主機名替換
    prefer-ip-address: true

3，由于服務提供者需要與資料庫進行操作，則新建資料庫,資料隨便插入幾個即可，方便用于測驗
在這里插入圖片描述

4，分別新建controller,service,pojo,mapper包
在這里插入圖片描述
PaymentMapper介面

package com.zheng.payment.mapper;

import com.zheng.api.pojo.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;

@Mapper
@Repository
public interface PaymentMapper {
    //插入資料
    public int toInsert(Payment payment);
    //通過id查詢資料
    public Payment getPaymentById(@Param("id") Long id);
}

PaymentMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zheng.payment.mapper.PaymentMapper">
    <insert id="toInsert" parameterType="com.zheng.api.pojo.Payment" useGeneratedKeys="true" keyProperty="id">
        insert into payment (serial) values (#{serial})
    </insert>
    <resultMap id="BaseResultMap" type="com.zheng.api.pojo.Payment">
        <id column="id" property="id" jdbcType="BIGINT"></id>
        <id column="serial" property="serial" jdbcType="VARCHAR"></id>
    </resultMap>
    <select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap">
        select * from payment where id = #{id}
    </select>
</mapper>

PaymentServiceI介面

package com.zheng.payment.service;

import com.zheng.api.pojo.Payment;
import org.apache.ibatis.annotations.Param;


public interface PaymentServiceI {
    //插入資料
    public int toInsert(Payment payment);
    //通過id查詢資料
    public Payment getPaymentById(@Param("id") Long id);
}

PaymentServiceImpl

package com.zheng.payment.service;

import com.zheng.api.pojo.Payment;
import com.zheng.payment.mapper.PaymentMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class PaymentServiceImpl implements PaymentServiceI {
    @Autowired
    private PaymentMapper paymentMapperl;
    @Override
    public int toInsert(Payment payment) {
        return paymentMapperl.toInsert(payment);
    }

    @Override
    public Payment getPaymentById(Long id) {
        return paymentMapperl.getPaymentById(id);
    }
}

主啟動類上加入注解

@EnableEurekaClient
@EnableDiscoveryClient

PaymentController

package com.zheng.payment.controller;

import com.zheng.api.pojo.CommonResult;
import com.zheng.api.pojo.Payment;
import com.zheng.payment.service.PaymentServiceImpl;
import lombok.extern.slf4j.Slf4j;
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.*;

import java.util.List;

@RestController
@Slf4j
public class PaymentController {
    @Autowired
    private PaymentServiceImpl paymentService;
    //向外暴露服務
    @Autowired
    private DiscoveryClient discoveryClient;
    @PostMapping(value = "/payment/toInsert")
    public CommonResult toInsert(@RequestBody Payment payment){
        int result = paymentService.toInsert(payment);
        log.info("**********插入結果是" + result + "qaq");
        //無論資料是否插入成功，都得將資料給回傳前端
        if(result > 0){
            return new CommonResult(200,"資料插入成功",result);
        }else{
            return new CommonResult(444,"插入資料失敗",null);
        }
    }

    @GetMapping(value = "/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") Long id){
        Payment payment = paymentService.getPaymentById(id);
        log.info("**********查詢的結果是" + payment + "qaq");
        //無論資料是否插入成功，都得將資料給回傳前端
        //return new CommonResult(200,"資料查詢成功！",payment);
        if(payment != null){
            return new CommonResult(200,"資料查詢成功",payment);
        }else{
            return new CommonResult(444,"插入查詢失敗",null);
        }
    }

    @GetMapping("payment/discovery")
    public DiscoveryClient getDiscoveryClient(){
        List<String> services = discoveryClient.getServices();
        services.forEach(e-> System.out.println(e));
        List<ServiceInstance> instances = discoveryClient.getInstances("PAYMENT-SERVICE");
        instances.forEach(e-> System.out.println(e));
        return this.discoveryClient;
    }


    @GetMapping(value = "qaq")
    public String qaq(){
        return "hello world";
    }
}

5,新創建一個新的模塊作為服務提供者，只需修改埠號即可，其他代碼一致

十，消費者consumer-order-80

在這里插入圖片描述
1,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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud2020</artifactId>
        <groupId>com.atgui.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>consumer-order-80</artifactId>
    <dependencies>

        <!--包含了sleuth+zipkin;sleuth鏈路監控展現,P94所需依賴-->
        <!--<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>-->

        <!--   引入eureka客戶端     -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <!--引入自己定義的 api 通用包-->
            <groupId>com.atgui.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
            <scope>provided</scope>
        </dependency>
        <!--熱部署工具-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

</project>

2,ApplicationContextConfig.class

package com.zheng.order.config;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration
//告訴springboot這是一個配置類，相當于以前在spring中的applicationContext.xml組態檔
public class ApplicationContextConfig {
    //既然是相當于以前的xml的組態檔，那么就可以在里面注入物件了
    @Bean
    @LoadBalanced       //開啟負載均衡機制
    public RestTemplate getRest(){
        return new RestTemplate();
    }
}

3，主程式類中添加注解

@EnableEurekaClient

4,撰寫OrderController類

package com.zheng.order.controller;

import com.zheng.api.pojo.CommonResult;
import com.zheng.api.pojo.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@Slf4j
public class OrderController {
    @Autowired
    private RestTemplate restTemplate;
    public static final String URL = "http://payment-service/";
    @GetMapping("/consumer/payment/toInsert")
    public CommonResult<Payment> toInsert(@RequestBody Payment payment){
        return restTemplate.postForObject(URL + "payment/toInsert",payment,CommonResult.class);
    }
    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable Long id){
        return restTemplate.getForObject(URL+"payment/get/" + id,CommonResult.class);
    }

}

十一，測驗

新開啟eureka兩個服務注冊中心，在兩個開啟服務提供者，再開啟一個消費者，然后五個微服務全部開啟
在這里插入圖片描述
開始測驗，由于修改了本地埠，就可以直接使用本地埠進行測驗了
輸入：http://eureka7002.com:7002/ 和http://eureka7001.com:7001/

就可以發現服務以及注冊到注冊中心了
接下來測驗客戶端能否拿到服務端的資料
在這里插入圖片描述
測驗暴露的服務

測驗插入資料

那肯定也保存在資料庫中了！

十二，總結

簡單的Eureka實作服務中心就成功地部署了！

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