Spring Cloud

LES000LIE2026-03-18 11:42
复制代码 
<?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.kh.springCloud</groupId>
  <artifactId>cloud</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>pom</packaging>  <!-- packaging默认类型jar类型，如果不做配置，maven会将该项目打成jar包 -->

  <!--统一管理jar包版本-->
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>12</maven.compiler.source>
    <maven.compiler.target>12</maven.compiler.target>
    <junit.version>4.12</junit.version>
    <lombok.version>1.18.10</lombok.version>
    <log4j.version>1.2.17</log4j.version>
    <mysql.version>5.1.47</mysql.version>
    <druid.version>1.1.16</druid.version>
    <mybatis.spring.boot.version>2.1.1</mybatis.spring.boot.version>
  </properties>

  <!-- 子模块使用之后，提供作用：锁定版本+module不用写groupId和version  -->
  <!-- dependencyManagement声明依赖，并不实现引用 -->
  <dependencyManagement>
    <dependencies>

      <dependency>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-project-info-reports-plugin</artifactId>
        <version>3.0.0</version>
      </dependency>

      <!--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 阿里巴巴-->
      <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>

      <!--mysql-->
      <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>${mysql.version}</version>
        <scope>runtime</scope>
      </dependency>

      <!-- druid-->
      <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>${druid.version}</version>
      </dependency>

      <!--mybatis-->
      <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>${mybatis.spring.boot.version}</version>
      </dependency>

      <!--junit-->
      <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>${junit.version}</version>
      </dependency>

      <!--log4j-->
      <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>${log4j.version}</version>
      </dependency>

    </dependencies>
  </dependencyManagement>

</project>

五小句话

1、建Module

File -> New -> Module -> Module SDK选择Project SDK(1.8) -> Next -> Add as module to (cloud) -> Parent(cloud) -> ArtifactId (cloud-provider-payment8001) -> Next -> Module name (cloud-provider-payment8001)

2、改POM

复制代码 
<?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>cloud</artifactId>
        <groupId>com.kh.springCloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-provider-payment8001</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--监控-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
            <!--这里最好不去掉版本，避免出现 Cannot resolve com.alibaba:druid-spring-boot-starter:unknown   父POM中没有druid-->
            <!--如果没写版本,从父层面找,找到了就直接用,全局统一-->
        </dependency>
        <!--mysql-connector-java-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--jdbc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>


</project>

POM文件引入之后爆红，报错原因是该包not found，右键选择Maven ，点击Reimport，错误消失。

3、写YML

复制代码 
spring:
  application:
    name: cloud-payment-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource   # 当前数据源操作类型
    driver-class-name: com.mysql.jdbc.Driver    # mysql驱动包
    url: jdbc:mysql://localhost:3306/db2019?useUnicode=true&characterEncoding=UTF-8&useSSL=false
    username: ${username}
    password: ${password}

mybatis:
    mapper-locations: classpath*:mapper/*.xml
    type-aliases-package: com.kh.springcloud.entities

4、主启动

创建Spring Boot启动类：

复制代码 
package com.kh.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class PaymentMain8001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8001.class, args);
    }
}

5、业务类

a、建表SQL

复制代码 
-- ----------------------------
-- Table structure for payment
-- ----------------------------
DROP TABLE IF EXISTS `payment`;
CREATE TABLE `payment` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'ID',
  `serial` varchar(200) DEFAULT '',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

b、entities

实体类Payment

复制代码 
package com.kh.springcloud.entities;

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

import java.io.Serializable;

@Data                 //get set
@AllArgsConstructor   //全参构造
@NoArgsConstructor    //无参构造
public class Payment implements Serializable {
    private long id;
    private String serial;
}

JSON封装体CommonResult

复制代码 
package com.kh.springcloud.entities;

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

@Data                 //get set
@AllArgsConstructor   //全参构造
@NoArgsConstructor    //无参构造
public class CommonResult<T> {
    // 404
    private Integer code; //错误编码
    private String message; //错误提示
    private T data;  //数据

    public CommonResult(Integer code,String message) {
        this(code,message,null);
    }
}

坑：如没有安装Lombok插件，编写函数时会报错

解决：https://www.cnblogs.com/gaogaoyanjiu/p/9823241.html

c、dao

接口PaymentDao

复制代码 
package com.kh.springcloud.dao;

import com.kh.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;

@Mapper
public interface PaymentDao {

    public int create(Payment payment);       //新增

    public Payment getPaymentById(@Param("id") Long id);  //读取
}

mybatis映射文件PaymentMapper.xml

复制代码 
<?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.kh.springcloud.dao.PaymentDao">

    <insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
        insert into payment(serial) values (#{serial});
    </insert>

    <select id="getPaymentById" parameterType="Long" resultType="Payment" resultMap="BaseResultMap">
        select * from payment where id=#{id};
    </select>

    <resultMap id="BaseResultMap" type="com.kh.springcloud.entities.Payment">
        <id column="id" javaType="BIGINT"/>
        <result column="serial" property="serial" javaType="VARCHAR"/>
    </resultMap>
</mapper>

4、service

Service接口

复制代码 
package com.kh.springcloud.service;

import com.kh.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Param;

public interface PaymentService {

    public int create(Payment payment);       //新增

    public Payment getPaymentById(@Param("id") Long id);  //读取

}

Service实现类

复制代码 
package com.kh.springcloud.service.impl;

import com.kh.springcloud.dao.PaymentDao;
import com.kh.springcloud.entities.Payment;
import com.kh.springcloud.service.PaymentService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

@Service
public class PaymentServiceImpl implements PaymentService {

    @Resource
    private PaymentDao paymentDao;


    @Override
    public int create(Payment payment) {
        return paymentDao.create(payment);
    }

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

5、controller

复制代码 
package com.kh.springcloud.controller;

import com.kh.springcloud.entities.CommonResult;
import com.kh.springcloud.entities.Payment;
import com.kh.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;

@RestController
@Slf4j
public class PaymentController {

    @Resource
    private PaymentService paymentService;

    @PostMapping(value = "/payment/create")
    public CommonResult create(Payment payment){
        int result = paymentService.create(payment);
        log.info("****************插入结果：" + result);

        if (result>0){
            return new CommonResult(200,"插入数据成功",result);
        }else{
            return new CommonResult(444,"插入数据库失败",null);
        }
    }

    @GetMapping(value = "/payment/get/{id}")    //读操作
    public CommonResult getPaymentById(@PathVariable("id") Long id){
        System.out.println("开始查询");
        Payment payment = paymentService.getPaymentById(id);
        log.info("****************查询结果：" + payment);

        if (payment != null){
            return new CommonResult(200,"查询数据成功",payment);
        }else{
            return new CommonResult(444,"没有对应记录，查询ID:"+id,null);
        }
    }

}

e、测试

访问http://localhost:8001/payment/get/1，出现该ID的JSON数据格式。

课堂中出现的是DashBoard，新版本中是Service。

启动OrderMain80报错

复制代码 
Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class


Action:

Consider the following:
	If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
	If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).


Process finished with exit code 0

解决：

方法一：

在yml文件中添加数据源的配置：

复制代码 
spring:
  application:
    name: cloud-order-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource   # 当前数据源操作类型
    driver-class-name: com.mysql.jdbc.Driver    # mysql驱动包
    url: jdbc:mysql://localhost:3306/cloud?useUnicode=true&characterEncoding=UTF-8&useSSL=false
    username: root
    password: a

方法二：

pom.xml中不添加数据库相关依赖：

复制代码 
<?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>cloud</artifactId>
        <groupId>com.kh.springCloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-comsumer-order80</artifactId>
    <packaging>pom</packaging>

  <!--  <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.yml</include>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.yml</include>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>-->

    <dependencies>
        <!-- 自己定义的api通用包， 提供Payment实体类以及CommonResult通用类-->
        <dependency>
            <groupId>com.kh.springCloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>${project.version}</version>
        </dependency>

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

        <!--监控-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>
</project>

application.yml中配置如下：

复制代码 
server:
  port: 80

spring:
  application:
    name: cloud-order-service

消费者订单模块

1.建module

File -> New -> Module -> Module SDK选择Project SDK(1.8) -> Next -> Add as module to (cloud) -> Parent(cloud) -> ArtifactId (cloud-consumer-order80) -> Next -> Module name (cloud-consumer-order80)

2.改pom

复制代码 
<?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>cloud</artifactId>
        <groupId>com.kh.springCloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-comsumer-order80</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--监控-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
            <!--这里最好不去掉版本，避免出现 Cannot resolve com.alibaba:druid-spring-boot-starter:unknown   父POM中没有druid-->
            <!--如果没写版本,从父层面找,找到了就直接用,全局统一-->
        </dependency>
        <!--mysql-connector-java-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--jdbc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

3.写YML

复制代码 
server:
  port: 80

# 避免出现  
#  Failed to configure a DataSource: 'url' attribute is not specified and no embedded
# datasource could be configured.

# Reason: Failed to determine a suitable driver class

spring:
                application:
                  name: cloud-order-service
                datasource:
                  type: com.alibaba.druid.pool.DruidDataSource   # 当前数据源操作类型
                  driver-class-name: com.mysql.jdbc.Driver    # mysql驱动包
                  url: jdbc:mysql://localhost:3306/cloud?useUnicode=true&characterEncoding=UTF-8&useSSL=false
                  username: root
                  password: a

4.启动类

复制代码 
package com.kh.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class OrderMain80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderMain80.class, args);
    }
}

5.业务类

entities同上

RestTemplate

复制代码 
package com.kh.springcloud.config;

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

@Configuration
public class ApplicationContextConfig {

    @Bean
    public RestTemplate getRestTemplate() {
        return new RestTemplate();
    }

}

package com.kh.springcloud.controller;

import com.kh.springcloud.entities.CommonResult;
import com.kh.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@Slf4j
@RestController
public class OrderController {

    public static final String PAYMENT_URL = "http://localhost:8001";

    @Resource
    private RestTemplate restTemplate;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL + "payment/create",payment,CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "payment/get/" + id,CommonResult.class);
    }

}

6.测试

http://localhost/consumer/payment/get/1

复制代码 
{"code":200,"message":"查询数据成功","data":{"id":1,"serial":"111"}}

http://localhost/consumer/payment/create?serial=132

复制代码 
{"code":200,"message":"插入数据成功","data":1}

插入操作有主键，却没有内容：在8001中

html 复制代码 
PaymentController类中加入@RequestBody注解
复制代码 
   @PostMapping(value = "/payment/create")
    public CommonResult create(@RequestBody Payment payment){
        int result = paymentService.create(payment);
        log.info("****************插入结果：" + result);

        if (result>0){
            return new CommonResult(200,"插入数据成功",result);
        }else{
            return new CommonResult(444,"插入数据库失败",null);
        }
    }

因为restTemplate发送的请求是JSON格式的，json格式在接收时要用@RequestBody注解，需要对请求实体进行属性映射

工程重构

原因：多个项目中需要使用到实体类，可抽象出来，降低代码耦合度

1.建Module

cloud项目下新建名为cloud-api-common的maven子项目

2.改pom

复制代码 
<?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>cloud</artifactId>
        <groupId>com.kh.springCloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-api-common</artifactId>

    <dependencies>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!-- lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.1.0</version>
        </dependency>
    </dependencies>

</project>

3.将实体类进行复制

新建package，名为com.kh.springcloud，然后将Payment实体以及CommonResult通用封装类复制到包下。

4.maven命令下clean install

5依赖的项目进行修改

a.在cloud-consumer-order80以及cloud-provider-payment8001项目中删除entities包,

b.分别在以上两个项目中添加pom依赖:

复制代码 
<!-- 自己定义的api通用包， 提供Payment实体类以及CommonResult通用类-->
        <dependency>
            <groupId>com.kh.springCloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>${project.version}</version>
        </dependency>

Eureka

作用：服务注册与发现

Eureka Server端服务注册中心

1.建module

在cloud项目下建一个名为cloud-eureka-server7001的项目

2.改pom

复制代码 
<?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>cloud</artifactId>
        <groupId>com.kh.springCloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-eureka-server7001</artifactId>
    <dependencies>

        <!-- eureka-server -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

        <!-- 引用自己定义的api通用包，可以使用Payment支付Entity -->
        <dependency>
            <groupId>com.kh.springCloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>${project.version}</version>
        </dependency>

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

        <!--监控-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!-- lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

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

</project>

3.写yml

复制代码 
server:
  port: 7001

eureka:
  instance:
    hostname: localhost    #eureka服务端的实例名称
  client:
    # false 表示不向注册中心注册自己
    register-with-eureka: false
    # 表示自己就是注册中心， 职责是维护服务实例，  不需要检索服务
    fetch-registry: false
    service-url:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

4.主启动

复制代码 
package com.kh.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class EurekaMain7001 {

    public static void main(String[] args) {
        SpringApplication.run(EurekaMain7001.class, args);
    }

}

5.测试

访问http://localhost:7001/，页面出现

Eureka Client端

1.建module，在cloud-provider-payment8001基础上进行修改

2.改pom

加入eureka client依赖

复制代码 
   <!-- eureka-client -->
   <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
   </dependency>

3.写yml

添加eureka client配置

复制代码 
eureka:
  client:
    # 是否将自己注册进eureka Server  ， 默认为true
    register-with-eureka: true
    # 是否将EurekaServer抓取已有的注册信息，默认为true，单节点无所谓，集群环境必须设置为true才能使用ribbon进行负载均衡
    fetch-registry: true
    service-url:
      defaultZone: http://localhost:7001/eureka  #注册地址

4.主启动

添加@EnableEurekaClient注解

5.测试

运行cloud-provider-payment8001，访问http://localhost:7001/，出现该应用。

将订单80模块注册进Eureka Client端

1.建module

2.改pom

3.写yml

4.主启动

5.业务类

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