微服务模块流程：

1.建module

右键父工程，选择New中的Module。

输入模块名称。点击【Finish】。

建好的结构如下：

2.改POM

查看父工程的POM文件，看看变化。在父POM中多了modules节点。

 选择modeul中的pom，添加引入配置：

<?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>ckfuture-springcloud</artifactId>
        <groupId>com.ckfuture.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>
    <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>
    </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>
    <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

新建yml文件。在modul中找到main下的resources右键新建file。输入“application.yml”

 application.yml配置信息为：

server:
  port: 8001

spring:
  application:
    name: cloud-payment-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:3306/standarddb?userUnicode=true&characterEncoding=utf-8&useSSL=false
    username: sa
    password: HRBJYKJ-Battery
mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.atguigu.springcloud.entities

注：如果type：com.alibab.druid.pool.DruidDataSource爆红，则在mave中重新下载一下即可。

4.主启动

在main的java右键新建Java Class。

 输入名称："com.ckfuture.springcloud.PaymentMain8001"。

 修改类代码：

package com.ckfuture.springcloud;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @descrption： 主启动类
 * @author： CKFuture
 * @since： 2021-10-09 21:18
 * @version： v1.0
 * @LastEditTime：
 * @LastEditors：
 * @copyright： hrbckfuture.com
 */
@SpringBootApplication
public class PaymentMain8001 {
    private static final Logger logger = LoggerFactory.getLogger(PaymentMain8001.class);
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8001.class,args);
        logger.info("------------ API Service8001 Start Running--------------");
    }
}

5.业务类

1）创建数据表

创建数据表payment。

2）entities

创建“entities”文件夹。分别创建Payment和CommonResult类。Payment为支付实体类。CommonResult为统一的返回类。

package com.ckfuture.springcloud.entities;

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

import java.io.Serializable;
/**
 * @descrption： 支付实体类
 * @author： CKFuture
 * @since： 2021-10-09 21:35
 * @version： v1.0
 * @LastEditTime：
 * @LastEditors：
 * @copyright： hrbckfuture.com
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
    private Long id;
    private String serial;
}

package com.ckfuture.springcloud.entities;

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

@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult<T>
{
    //返回代码
    private Integer code;
    //返回信息
    private String message;
    //返回数据
    private T      data;

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

3）dao

创建“dao”文件夹，并创建“PaymentDao”接口。

package com.ckfuture.springcloud.dao;

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

@Mapper
public interface PaymentDao {
    /**
     * 添加
     * @param payment
     * @return
     */
    public int create(Payment payment);

    /**
     * 通过id查询数据
     * @param id
     * @return
     */
    public Payment getPaymentById(@Param("id") Long id);
}

在resources中创建mapper文件夹，并创建“PaymentMapper.xml”文件，用于实现PaymentDao接口。

<?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.ckfuture.springcloud.dao.PaymentDao">
    <resultMap id="BaseResultMap" type="com.ckfuture.springcloud.entities.Payment">
        <id column="id" property="id" jdbcType="BIGINT"/>
        <id column="serial" property="serial" jdbcType="VARCHAR"/>
    </resultMap>

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

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

4）service

创建“service”文件夹，并创建“PaymentService”接口。

package com.ckfuture.springcloud.service;

import com.ckfuture.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Param;
/**
 * @descrption： 支付服务接口
 * @author： CKFuture
 * @since： 2021-10-09 22:26
 * @version： v1.0
 * @LastEditTime：
 * @LastEditors：
 * @copyright： hrbckfuture.com
 */
public interface PaymentService {
    /**
     * 添加
     * @param payment
     * @return
     */
    public int create(Payment payment);

    /**
     * 通过id查询数据
     * @param id
     * @return
     */
    public Payment getPaymentById(@Param("id") Long id);
}

创建“impl”文件夹，并创建“PaymentServiceImpl”实现类。

package com.ckfuture.springcloud.service.impl;

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

import javax.annotation.Resource;
/**
 * @descrption： 支付服务接口实现类
 * @author： CKFuture
 * @since： 2021-10-09 22:26
 * @version： v1.0
 * @LastEditTime：
 * @LastEditors：
 * @copyright： hrbckfuture.com
 */
@Service
public class PaymentServiceImpl implements PaymentService {
    @Resource
    private PaymentDao paymentDao;

    public int create(Payment payment){
        return paymentDao.create(payment);
    }
    public Payment getPaymentById(Long id){
        return paymentDao.getPaymentById(id);
    }
}

5）controller

新建“controller”文件夹，并创建“PaymentController”类。

package com.ckfuture.springcloud.controller;

import com.ckfuture.springcloud.entities.CommonResult;
import com.ckfuture.springcloud.entities.Payment;
import com.ckfuture.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,"插入数据库成功",result);
        }else {
            return new CommonResult(301,"插入数据库失败",null);
        }
    }

    @GetMapping(value = "/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") Long id){
        Payment payment = paymentService.getPaymentById(id);
        log.info("*****查询结果："+payment);
        if(payment != null){
            return new CommonResult(200,"查询成功",payment);
        }else {
            return new CommonResult(301,"没有对应记录，查询Id:"+id,null);
        }
    }
}

6.测试

启动8001服务

浏览器数据测试接口，得到查询数据。

 利用postman测试插入